CN107899388A - A kind of waste gas containing fluoride treatment process - Google Patents
A kind of waste gas containing fluoride treatment process Download PDFInfo
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- CN107899388A CN107899388A CN201711185179.2A CN201711185179A CN107899388A CN 107899388 A CN107899388 A CN 107899388A CN 201711185179 A CN201711185179 A CN 201711185179A CN 107899388 A CN107899388 A CN 107899388A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/02—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 adsorption, e.g. preparative gas chromatography
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B01D53/68—Halogens or halogen compounds
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract
The invention belongs to technical field of waste gas treatment.The invention discloses a kind of waste gas containing fluoride treatment process, it includes exhaust gas filtering, the reaction of mixed aerosol solution, secondary filter, hydrodynamic seepage pressure and post-treating and other steps, for Modified Micron zero-valent iron particle, it is made the filled media that wherein hydrodynamic seepage pressure reaction uses by micron zero-valent iron particle, diatomite and melamine resin solution.Waste gas containing fluoride treatment process treatment effect in the present invention is more preferable, and has more preferable treatment effeciency；Processing cost is cheap, mitigates production economy burden.
Description
Technical field
The present invention relates to technical field of waste gas treatment, more particularly, to a kind of waste gas containing fluoride treatment process.
Background technology
Waste gas containing fluoride typically refers to the industrial waste gas containing gaseous hydrogen fluoride HF, ocratation SiF4.It is mainly derived from aluminium
Smelting, rock phosphate in powder processing, production of phosphate fertilizer, the emission of smelting iron and steel and coal burning process.Although waste gas containing fluoride quantity is not
As sulfur and nitrogen oxides are big, but its toxicity is larger, 20 times big to the hazard ratio SO2 of human body, and fluorine is accumulation property poisonous substance, is planted
Thing leaf, herbage can absorb fluorine, after cattle and sheep eat the forage of this pollution, arthrocele, osteoporosis, or even paralysis can be caused to crouch
Do not rise.
The activity of people's excess intake fluorine meeting interferases, destroys calcium, the metabolic balance of phosphorus, tooth life spot, dysarthrasis occurs
Etc. the fluorosis of bone of symptom.Region fluorosis of bone is due to the main of endemic fluorosis caused by natural water fluoride pollution and fluorosis of bone
Reason.Waste gas containing fluoride and the washings with washing method processing waste gas containing fluoride, after being discharged into environment, can cause the dirt of water body and soil
Dye.Fluorine-containing flue dust sedimentation or water wash of accepting a surrender, can make soil and groundwater contaminated.Therefore industrial production discharge gas must control
The discharge capacity of fluorochemical.
Processing to the dust of fluoro-gas, mainly there is two kinds of wet method and dry method.Wet method fluorine removal:Using liquid-absorbant from
Hydrogen fluoride, ocratation etc. are absorbed in flue gas, the fluorine-containing solution separated is pocessed that fluoride is made, and can recycle profit
With.Since fluoride water solubility is very strong, absorbs quickly, very good effect can be received.It is costly but wet method fluoride-removing equipment is complicated,
Seriously corroded, there is secondary pollution problem.Dry method fluorine removal:Dry method fluorine removal purification process is simple, and processing exhaust gas volumn is big, fluorine removing rate
Height, the problems such as not arranging fluoride waste, non-secondary pollution and equipment corrosion, capital cost and operating cost are all relatively low.But dry
The selection of cleanser has a great influence for defluorination effect and process costs during method fluorine removal.
The content of the invention
To solve the above problems, improve several times and with good processing the present invention provides a kind of waste gas pollution control and treatment technical efficiency
The waste gas containing fluoride treatment process of effect.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.1~0.3；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Whole waste gas containing fluoride treatment process includes five parts, i.e. filtering, mixed aerosol solution, secondary filter, permeable reactive
Grid reacts and post processing.The first step removes the solid particle in exhaust gas using sack cleaner, and one being in order to clean two
Also for ensureing being normally carried out and mitigating the processing pressure in subsequent technique for subsequent treatment.Second step mixed aerosol solution,
It is that sodium carbonate is added into exhaust gas, sodium carbonate and hydrogen fluoride in waste gas containing fluoride etc. can react in advance, generate the fluorine-containing of solid
The reason for compound, mitigates the pressure in subsequent treatment, and additional mixing is atomized sodium carbonate liquor rather than mixture of sodium carbonate powder
It is to add the water needed in subsequent reactions, water can participate in the subsequent reactions in hydrodynamic seepage pressure, be exactly specifically
The zero-valent iron particle by water soluble polymer Melamino-formaldehyde resin encapsulated is set to work.3rd step secondary filter be in order to
The solid-state fluorochemical produced after filtering mixture of sodium carbonate in exhaust gas, while the filter medium of this step is emergy, corundum
Sand also has good absorption aggtegation to the harmful substance in waste gas containing fluoride, can play the fluorine-containing nuisance of certain removal
Effect.4th step, hydrodynamic seepage pressure react the fluoride waste in exhaust gas of further degrading using the strong reducing property of Zero-valent Iron.
5th step, four subsequent treatment, four eliminate as far as possible for the harmful substance ensured in exhaust gas, utilize the solid in water filtration exhaust gas
Particle, while also ensure that harmful fluoride waste in exhaust gas can be completely absorbed.
Preferably, in step b, sodium carbonate liquor is the saturated sodium carbonate solution at 25~30 DEG C.
Since handled waste is gas, when adding water and sodium carbonate thereto, it is necessary to first by sodium carbonate
Solution carries out atomization process, then the solution after atomization process is passed into exhaust gas, and sodium carbonate is water-soluble after so-called atomization here
The volume of liquid refers to, the volume similar to gas form and non-atomized preceding sodium carbonate that aqueous sodium carbonate obtains after atomization
The volume of solution.
Preferably, the emergy in step c is particle diameter is 0.5~1.2mm, the emergy that nonuniformity coefficient is 2.
Preferably, the flow velocity of gaseous mixture is 1/4~1/3 of waste gas containing fluoride flow velocity in step b in step c.
Preferably, in step d, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle.
Preferably, Modified Micron zero-valent iron particle is made by following steps, by micron zero-valent iron particle weight 0.2~
0.6 times of melamine resin, which is dissolved in the deionized water of 2~6 times of micron zero-valent iron particle weight, is made melamine
Micron zero-valent iron particle, is added in melamine resin thing solution and is uniformly mixed, so by formaldehyde resin solution after dissolving
The diatomite for adding 1~2 times of micron zero-valent iron particle weight afterwards is uniformly mixed and Modified Micron zeroth order is made after drying and crushing
Iron particle.
Zero-valent Iron is a kind of typical hydrodynamic seepage pressure active material, it has very high reduction potential, up to-
440mV, reducing agent is served as in the hydrodynamic seepage pressure of the present invention, and the organic pollution in deoxidization, degradation exhaust gas, makes macromolecular
Organic pollution be decomposed into the organic matter of small molecule.Since Zero-valent Iron is a kind of material with high reproducibility, it is being made
Easily aoxidized, and then failed when being contacted with the external world after the completion of standby, it is therefore desirable to Zero-valent Iron is first coated, obstruct its with
The contact of extraneous particularly air；Also need to participate in reacting in time in exhaust-gas treatment at the same time, using water soluble polymer
Melamino-formaldehyde resin encapsulated zero-valent iron particle, does not contact with the external world after enabling it when that need not use, does not lose
Effect, when needing it to play a role, i.e., can participate in reacting, in order to which the Zero-valent Iron after coated can in time when handling exhaust gas
Work when handling exhaust gas, be mixed into a certain amount of aqueous solution through atomization process in the offgas.In addition, also by diatomite and zeroth order
Iron is for composite, and one being that can preferably fix zero-valent iron particle, and two being after being also used as organic pollutant degradation reduction
Adsorbent, the organic pollution after absorption degradation.
Preferably, the particle diameter of micron zero-valent iron particle is 50~75 μm.
Preferably, the spherical filter tank in step a is by spherical filter, air inlet pipe, net gas air outlet pipe and visceral-qi air outlet pipe
Composition；Spherical filter is made of episphere filter and lower semisphere filter, and episphere filter and lower semisphere filter lead to
Removable fixation means are crossed to be fixed together；Episphere filter top is equipped with tracheae connector, and episphere filter interior is set
There are circular filter plate, filter plate bracket and filter plate cleaner, filter plate is placed in filter plate bracket, and the height of filter plate bracket is more than filter plate
Thickness, filter plate cleaner are made of stent, filter plate brush, blade and rotation axis, and rotation axis is fixed on stent, and blade, which is arranged on, to be rotated
The middle part of axis, the quantity of blade are at least 3 and are uniformly distributed, and filter plate brush is horizontally disposed with and one section of top for being fixed on rotation axis
End；Lower semisphere filter interior structure is identical with episphere filter, and the internal structure of lower semisphere filter connects along level
Conjunction face and episphere filter interior symmetrical configuration；Air inlet pipe is arranged on is arranged on ball in the top of spherical filter, net gas air outlet pipe
The middle part of shape filter, visceral-qi air outlet pipe are arranged under spherical filter；Air inlet pipe and visceral-qi air outlet pipe are slided with spherical filter
Dynamic connection, net gas air outlet pipe are rotatablely connected with spherical filter.
In common filter/filtration apparatus, it is necessary to replace filter medium after the use of some time, or it is right
Filter medium is cleaned, to ensure that the particulate matter obstruction filter medium that filter media surface is deposited on after filtering reduces filtering
Efficiency, but filter medium is frequently replaced, efficiency inconvenient and that filtering can be largely effected on.It is spherical in the present invention
Filter has the function of automatically cleaning filter medium；The present invention is mainly made of spherical filter, and spherical filter is divided into two
Hemisphere filter, i.e. episphere filter and lower semisphere filter, the two hemisphere filters are identical（Episphere filter
With lower semisphere filter name difference simply according to the different titles described for convenience in position when using）, two hemisphere
After filter fits together, internal structure is on faying face mirror symmetry；The filter plate of filtering is included in episphere filter,
The filter plate bracket of fixed filter plate, Clean- filter plate cleaner, filter plate bracket is made of upper and lower two parts and upper and lower two parts
Spacing be slightly larger than the thickness of filter plate, i.e., filter plate be placed in after filter plate bracket can carried out on filter plate direction it is small-scale
Mobile, filter plate cleaner is connected by the stent for filter plate cleaner to be fixed on to episphere filter inner wall, with holder pivots
If rotation axis, be fixed in the middle part of rotation axis dry plate blade, for cleaning filter plate and being fixed on the filter plate brush on rotation axis top
Composition, air-flow can drive rotation axis to rotate after flowing through blade, and then drive filter plate brush to be rotated.During operating, one section is handled
Spherical filter is rotated into 180 degree along trunnion axis after time, that is, the upper and lower hemispheres filter replacement position before rotating is, it is necessary to handle
Exhaust gas enter episphere filter from air inlet pipe, most of gas exits into subsequent processing from net gas air outlet pipe after filtering,
Gas after fraction filtering enters lower semisphere filter, since lower semisphere filter was carrying out filtration treatment before, its
Filter plate surface deposited particulate matter, and spherical filter is by rotation, and the surface of filter plate deposited particles is changed into lower surface, due to filter plate
The height of bracket is more than the thickness of filter plate, due to gravity, filter plate in lower semisphere filter from filter plate brush closer to（Even
Since both particle deposit thickness problems are close to）, flow into the blade on the net gas impact filter plate cleaner of lower semisphere filter, band
Turn moving axis rotates, and then drives blade filter plate brush to rotate, the particulate matter of cleaning filter plate deposition, after deposit is reduced, net gas
Also the particle of filter plate lower surface can be taken away when flowing through filter plate, and then is played to the self-cleaning effect of filter plate.In the spherical filter
Filter plate it is possible thereby to accomplish to reduce the effect for replacing filter plate, increase the continuous efficiency of filtering.It is air inlet pipe, net gas air outlet pipe, dirty
Gas air outlet pipe is all fixed relative to place.
It to be clip or method that the removable fixation means used are connected between episphere filter and lower semisphere filter
The removable fixation means such as orchid.Net gas air outlet pipe is arranged on the middle part of spherical filter, the axis and spherical filter of net gas air outlet pipe
The horizontal axis of device is same straight line, and spherical filter axis direction is provided with the perforate of net gas outlet.
Pair with the present invention in it is unmentioned realize spherical filter rotate device, air inlet pipe, visceral-qi air outlet pipe with it is spherical
The specific implementation being slidably connected between filter, the specific implementation being rotatablely connected between net gas air outlet pipe and spherical filter
Mode, those of ordinary skill in the art have the ability to utilize this area or the association area common sense/prior art hand of its grasp
The suitable devices of Duan Xuanyong and mode.
Therefore, the invention has the advantages that：
（1）Waste gas containing fluoride treatment process treatment effect in the present invention is more preferable, and has more preferable treatment effeciency；
（2）Waste gas containing fluoride treatment process process in the present invention is of low cost, mitigates production economy burden.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram in the spherical filter tank in the present invention；
Fig. 2 is a kind of schematic diagram of filter plate cleaner in spherical filter tank in the present invention；
In figure：Spherical filter 1, air inlet pipe 2, net gas air outlet pipe 3, visceral-qi air outlet pipe 4, episphere filter 5, lower semisphere filtering
Device 6, tracheae connector 51, filter plate 52, filter plate bracket 53, filter plate cleaner 54, stent 55, filter plate brush 56, blade 57, rotation axis
58。
Embodiment
Technical scheme is further described with reference to embodiment.
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, all other reality that those of ordinary skill in the art are obtained without making creative work
Example is applied, belongs to the scope of protection of the invention.
In the present invention, if not refering in particular to, all equipment and raw material is commercially available or the industry is common,
Method in following embodiments, is this area conventional method unless otherwise instructed.
Embodiment 1
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.1；Sodium carbonate liquor is the saturated sodium carbonate solution at 25 DEG C；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；Emergy is that particle diameter is 0.5
~1.2mm, the emergy that nonuniformity coefficient is 2；The flow velocity of gaseous mixture is 1/4 of waste gas containing fluoride flow velocity in step b；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Wherein, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle；Modified Micron zero-valent iron particle
It is made by following steps, 0.2 times of melamine resin of micron zero-valent iron particle weight is dissolved in a micron Zero-valent Iron
Melamine resin solution is made in the deionized water of 2 times of weight of grain, micron zero-valent iron particle is added to three after dissolving
It is uniformly mixed in melamine-formaldehyde resin object solution, the diatomite mixing for then adding 1 times of micron zero-valent iron particle weight is equal
Modified Micron zero-valent iron particle is made after even and drying and crushing；The particle diameter of micron zero-valent iron particle is 50 μm.
In addition, as shown in Fig. 1~2, spherical filter tank is by spherical filter 1, air inlet pipe 2, net gas air outlet pipe 3 and visceral-qi outlet
Pipe 4 forms；Spherical filter is made of episphere filter 5 and lower semisphere filter 6, episphere filter and lower semisphere filtering
Device is fixed together by removable fixation means；Episphere filter top is equipped with tracheae connector 51, episphere filter
Circular filter plate 52, filter plate bracket 53 and filter plate cleaner 54 are internally provided with, filter plate is placed in filter plate bracket, the height of filter plate bracket
Degree is more than the thickness of filter plate, and filter plate cleaner is made of stent 55, filter plate brush 56, blade 57 and rotation axis 58, and rotation axis is fixed
On stent, blade is arranged on the middle part of rotation axis, and filter plate brush is horizontally disposed with and one section of top for being fixed on rotation axis；Lower semisphere mistake
Filter internal structure is identical with episphere filter, and the internal structure of lower semisphere filter is along the horizontal joint and episphere
Filter interior symmetrical configuration；Air inlet pipe is arranged on to be arranged in spherical filter in the top of spherical filter, net gas air outlet pipe
Portion, visceral-qi air outlet pipe are arranged on the lower part of spherical filter；Air inlet pipe and visceral-qi air outlet pipe are slidably connected with spherical filter, net gas
Outlet pipe is rotatablely connected with spherical filter.
Embodiment 2
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.15；Sodium carbonate liquor is that the saturated sodium carbonate at 26 DEG C is molten
Liquid；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；Emergy is that particle diameter is 0.5
~1.2mm, the emergy that nonuniformity coefficient is 2；The flow velocity of gaseous mixture is 1/4 of waste gas containing fluoride flow velocity in step b；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Wherein, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle；Modified Micron zero-valent iron particle
It is made by following steps, 0.3 times of melamine resin of micron zero-valent iron particle weight is dissolved in a micron Zero-valent Iron
Melamine resin solution is made in the deionized water of 3 times of weight of grain, micron zero-valent iron particle is added to three after dissolving
It is uniformly mixed in melamine-formaldehyde resin object solution, then adds the diatomite mixing of 1.2 times of micron zero-valent iron particle weight
Modified Micron zero-valent iron particle uniformly and after drying and crushing is made；The particle diameter of micron zero-valent iron particle is 60 μm.
In addition, the concrete structure in spherical filter tank is the same as embodiment 1.
Embodiment 3
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.2；Sodium carbonate liquor is the saturated sodium carbonate solution at 27 DEG C；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；Emergy is that particle diameter is 0.5
~1.2mm, the emergy that nonuniformity coefficient is 2；The flow velocity of gaseous mixture is 3/10 of waste gas containing fluoride flow velocity in step b；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Wherein, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle；Modified Micron zero-valent iron particle
It is made by following steps, 0.4 times of melamine resin of micron zero-valent iron particle weight is dissolved in a micron Zero-valent Iron
Melamine resin solution is made in the deionized water of 4 times of weight of grain, micron zero-valent iron particle is added to three after dissolving
It is uniformly mixed in melamine-formaldehyde resin object solution, then adds the diatomite mixing of 1.5 times of micron zero-valent iron particle weight
Modified Micron zero-valent iron particle uniformly and after drying and crushing is made；The particle diameter of micron zero-valent iron particle is 65 μm.
In addition, the concrete structure in spherical filter tank is the same as embodiment 1.
Embodiment 4
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.25；Sodium carbonate liquor is that the saturated sodium carbonate at 28 DEG C is molten
Liquid；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；Emergy is that particle diameter is 0.5
~1.2mm, the emergy that nonuniformity coefficient is 2；The flow velocity of gaseous mixture is 1/3 of waste gas containing fluoride flow velocity in step b；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Wherein, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle；Modified Micron zero-valent iron particle
It is made by following steps, 0.5 times of melamine resin of micron zero-valent iron particle weight is dissolved in a micron Zero-valent Iron
Melamine resin solution is made in the deionized water of 5 times of weight of grain, micron zero-valent iron particle is added to three after dissolving
It is uniformly mixed in melamine-formaldehyde resin object solution, then adds the diatomite mixing of 1.7 times of micron zero-valent iron particle weight
Modified Micron zero-valent iron particle uniformly and after drying and crushing is made；The particle diameter of micron zero-valent iron particle is 70 μm.
In addition, the concrete structure in spherical filter tank is the same as embodiment 1.
Embodiment 5
A kind of waste gas containing fluoride treatment process, comprises the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.3；Sodium carbonate liquor is the saturated sodium carbonate solution at 30 DEG C；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；Emergy is that particle diameter is 0.5
~1.2mm, the emergy that nonuniformity coefficient is 2；The flow velocity of gaseous mixture is 1/3 of waste gas containing fluoride flow velocity in step b；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
Wherein, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle；Modified Micron zero-valent iron particle
It is made by following steps, 0.6 times of melamine resin of micron zero-valent iron particle weight is dissolved in a micron Zero-valent Iron
Melamine resin solution is made in the deionized water of 6 times of weight of grain, micron zero-valent iron particle is added to three after dissolving
It is uniformly mixed in melamine-formaldehyde resin object solution, the diatomite mixing for then adding 2 times of micron zero-valent iron particle weight is equal
Modified Micron zero-valent iron particle is made after even and drying and crushing；The particle diameter of micron zero-valent iron particle is 5 μm.
In addition, the concrete structure in spherical filter tank is the same as embodiment 1.
Technical indicator：
Using relevant detection method and standard in approximate industry cement industry atmosphere pollutants emission standards GB 4915-2005
Exhaust gas after waste gas containing fluoride waste gas purification process of the present invention is evaluated：
1. particulate matter：≤25mg/m3；
2. fluoride（In terms of total fluorine）：≤2.5mg/m3。
It should be appreciated that to those skilled in the art, it can according to the above description be improved or be become
Change, and all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (8)
1. a kind of waste gas containing fluoride treatment process, it is characterised in that comprise the following steps：
a）Exhaust gas filters：Exhaust gas is passed through into the particle in spherical filter tank removing exhaust gas；
b）Mixed aerosol solution：The sodium carbonate liquor being passed through into waste gas containing fluoride after filtering after atomization, is made gaseous mixture；Contain
The volume ratio of fluorine exhaust gas and the sodium carbonate liquor after atomization is 1：0.1~0.3；
c）Secondary filter：Gaseous mixture is passed through by filter bed；Filter medium in filter bed is emergy；
d）Hydrodynamic seepage pressure reacts：Gaseous mixture after step c processing is passed through into hydrodynamic seepage pressure；
e）Post processing：By through step d processing after gaseous mixture by water after discharge.
A kind of 2. waste gas containing fluoride treatment process according to claim 1, it is characterised in that：
In the step b, sodium carbonate liquor is the saturated sodium carbonate solution at 25~30 DEG C.
A kind of 3. waste gas containing fluoride treatment process according to claim 1, it is characterised in that：
Emergy in the step c is the emergy that particle diameter is 0.5~1.2mm, nonuniformity coefficient is 2.
A kind of 4. waste gas containing fluoride treatment process according to claim 1, it is characterised in that：
The flow velocity of gaseous mixture is 1/4~1/3 of waste gas containing fluoride flow velocity in step b in the step c.
A kind of 5. waste gas containing fluoride treatment process according to claim 1, it is characterised in that：
In the step d, the filled media in hydrodynamic seepage pressure is Modified Micron zero-valent iron particle.
A kind of 6. waste gas containing fluoride treatment process according to claim 5, it is characterised in that：
The Modified Micron zero-valent iron particle is made by following steps, by the three of 0.2~0.6 times of micron zero-valent iron particle weight
Melamine-formaldehyde resin, which is dissolved in the deionized water of 2~6 times of micron zero-valent iron particle weight, is made melamine resin
Micron zero-valent iron particle, is added in melamine resin thing solution and is uniformly mixed, then add by solution after dissolving
The diatomite of 1~2 times of micron zero-valent iron particle weight is uniformly mixed and Modified Micron zero-valent iron particle is made after drying and crushing.
A kind of 7. waste gas containing fluoride treatment process according to claim 6, it is characterised in that：
The particle diameter of the micron zero-valent iron particle is 50~75 μm.
A kind of 8. waste gas containing fluoride treatment process according to claim 1, it is characterised in that：
Spherical filter tank in the step a is made of spherical filter, air inlet pipe, net gas air outlet pipe and visceral-qi air outlet pipe；
The spherical filter is made of episphere filter and lower semisphere filter, episphere filter and lower semisphere filtering
Device is fixed together by removable fixation means；
The episphere filter top is equipped with tracheae connector, and the episphere filter interior is equipped with circular filter
Plate, filter plate bracket and filter plate cleaner, filter plate are placed in filter plate bracket, and the height of filter plate bracket is more than the thickness of filter plate, described
Filter plate cleaner be made of stent, filter plate brush, blade and rotation axis, the rotation axis is fixed on stent, the paddle
Leaf is arranged on the middle part of rotation axis, and the filter plate brush gas puts down setting and is fixed on the top of rotation axis；
The lower semisphere filter interior structure is identical with episphere filter, and the internal structure edge of lower semisphere filter
The horizontal joint and episphere filter interior symmetrical configuration；
The air inlet pipe is arranged on is arranged on the middle part of spherical filter in the top of spherical filter, the net gas air outlet pipe,
The visceral-qi air outlet pipe is arranged under spherical filter；The air inlet pipe and visceral-qi air outlet pipe are slided with spherical filter to be connected
Connect, the net gas air outlet pipe is rotatablely connected with spherical filter；
The spherical filter can be rotated along trunnion axis.
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