CN108607315A - A kind of single solute component chemical floc and its preparation, application method for gas-particle separation - Google Patents
A kind of single solute component chemical floc and its preparation, application method for gas-particle separation Download PDFInfo
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- CN108607315A CN108607315A CN201810461882.XA CN201810461882A CN108607315A CN 108607315 A CN108607315 A CN 108607315A CN 201810461882 A CN201810461882 A CN 201810461882A CN 108607315 A CN108607315 A CN 108607315A
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- solute component
- component chemical
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- chemical floc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
- B01D51/02—Amassing the particles, e.g. by flocculation
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- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of single solute component chemical flocs and its preparation and application for gas solid separation, the flocculant by a concentration of 0.002% 0.1% pectin, gelatin, polyvinyl alcohol, xanthans, gum arabic or melon bean gum are mixed with water, it is atomized when use and is then fed into deduster and smoke contacts for 5 μm 60 μm of drop, 5 μm or less fine graineds caused by conventional fossil fuel burning can effectively be removed, it is simple with component, it is at low cost, advantages of environment protection, the component for avoiding current similar product generally existing is more, corrode flue, the shortcomings of influencing water body and environment.
Description
Technical field
The present invention relates to environmental technology fields, and in particular to a kind of single solute component chemical flocculation for gas-particle separation
Agent and its preparation, application method.
Background technology
The usual grain size of fine particle in air is small, active strong, and be easy to carry about with one harmful substance, atmospheric residence time
It is long, and easily in pulmonary deposition after being sucked by human body, to cause great health hazard to human body.To the row of airborne fine particulate matter
It is the inevitable requirement for realizing sustainable development to put row into and effectively administer.
In China, cement industry is one of maximum emission source of fine particle.According to existing cement industry atmosphere pollution
Object discharge standard (GB 4915-2013), cement kiln and the granular material discharged limit value of kiln tail afterheat utilizing system are 30mg/cm3, weight
Granular material discharged in particular time range of the regional enterprise of point is limited to 30mg/cm3.Increasingly harsh granular material discharged standard
New challenge is proposed to cement industry.
Traditional electric dust-removing process running resistance is low, applied widely and integrated operation is at low cost, in cement industry
To being widely applied.Currently, the kiln hood and kiln tail gas of most new type nonaqueous cement production lines are handled using electricity
Dedusting technology.Grain diameter in the efficiency of dust collection and flue gas of typical electric dust-removing process is closely related.During electric precipitation,
Grain size is extremely low less than the speed that 2 μm of particle is moved to receiving electrode in flue dust, and electric precipitation process is caused to be difficult to effectively remove flue dust
In fine particle.
The electric dust-removing process of existing cement kiln head and kiln tail is transformed, to realize the effective clear of efficient fine particle
Except be the key that reduce cement industry it is granular material discharged.It is a kind of that fine grained flocculation process is combined with traditional electric dust-removing process
The new method of simple and practicable, high efficiency, low cost improvement cement industry soot emissions quality.Someone has carried out correlative study,
As Chinese patent CN105771531A discloses the flocculation solution that a kind of ingredient is polyethyleneimine, Tween 80 and water, and by its
Processing for coal-burning power plant's fine particle；It is poly dimethyl allyl that Chinese patent CN 104474830A, which disclose ingredient,
The flocculation solution of ammonium chloride, sorbitan fatty acid ester and water, and use it for removing coal-fired fine particle.In addition, Chinese
Patent CN107096350A discloses one kind and is configured by bi-component water soluble polymer, surfactant and inorganic salts and water
Flocculation solution, and use it for removal coal-fired flue-gas in fine grained pollutant；Chinese patent CN 101513583B are disclosed
A kind of coal-fired ultrafine grain chemical agglomeration agent, the agglomerator is by surfactant, water-soluble high-molecular compound, inorganic salts and phosphorus
Acid composition can make ultra-fine grain discharge in coal-burning power plant's reduce by 30% or more.Chinese patent CN104087250A disclose it is a kind of by
The agglomerator of acrylamide or xanthans, surfactant, ammonium phosphate composition, the solution being configured to by the agglomerator can make flue gas
Middle ultrafine dust discharge reduces by 30%.Chinese patent CN105797532A discloses one kind by aluminium polychloride, carboxymethyl cellulose
The agglomerator of plain sodium, polyacrylamide, activated carbon, rubber powder composition, the solution being formulated by the agglomerator can be to agglomeration for iron mine
The fine particle that process generates generates emission reduction effect.(experimental study [D] that Chen Jun coal-fired superfine particulate matters are reunited such as Chen Jun
The Central China University of Science and Technology, 2005.) it has studied by the polymeric sorbents such as polyacrylamide, aluminium polychloride, xanthans, dodecane
Base sodium sulfonate, phosphoric acid composition solution to the flocculating effect of artificial flue, and point out the surfactant in reunion system and phosphorus
Acid has the agglomeration efficiency of simulated flue gas particulate matter important influence.In addition, having used simulated flue gas rather than reality in also studying
The tail gas of border kiln hood, surfactant and xanthans there are interactions such as hydrophobic-hydrophobic interaction, electrostatic interactions, these
Effect changes the state-of-charge and dynamic viscosity of xanthans, so as to reduce xanthans under actual application environment to
The bridge joint effect of grain object and reunion flocculating effect.
Analysis is it is found that fine grained flocculation system disclosed in above-mentioned patent document and document is complex, flocculating effect
Depend critically upon the multi-component collaboration such as polymer substance in flocculation system, inorganic salts, surfactant and acid-base modifier
Effect.On the one hand, the use of various active component significantly improves the use cost of flocculation solution, and it is large-scale extensive to influence it
Using；On the other hand, certain active components (such as inorganic salts, acid) in above-mentioned published flocculation system may cause flue
Corrosion, the components such as surfactant it is a large amount of using also can to water body, water plant and animal generate it is potentially hazardous.
Therefore, developing one pack system, low cost and environmentally friendly fine grained cohesion solution seems extremely necessary.
Invention content
It is an object of the invention to overcome the complicated component of existing tail gas fine grained flocculant generally existing, side effect big etc.
Deficiency provides a kind of single solute component chemical floc and its preparation, application method for gas-particle separation.The flocculant group
Divide simply, without components such as inorganic salts, surfactants, production and use cost are relatively low, will not be made to flue or environment
At harm, there is significant flocculation agglomeration to the PM2.5 in cement kiln tail gas.To achieve the above object, the present invention is adopted
Technical solution is as follows：
A kind of single solute component chemical floc for gas-particle separation is made of water and soluble high-molecular, it is described can
The one kind of soluble macromolecular in pectin, gelatin, polyvinyl alcohol, xanthans, gum arabic, melon bean gum.
Further, the mass fraction of soluble high-molecular is 0.002%- in single solute component chemical floc
0.1%.
The preparation method of above-mentioned single solute component chemical floc for gas-particle separation is specific as follows：Water is added first
Then heat is added a certain amount of soluble high-molecular and stirs evenly, obtain a concentration of 0.002wt%- thereto to 50-80 DEG C
Single solute component chemical floc of 0.1wt%, the soluble high-molecular be selected from pectin, gelatin, polyvinyl alcohol, xanthans,
One kind in gum arabic, melon bean gum.
The application method of above-mentioned single solute component chemical floc for gas-particle separation is specific as follows：It will be prepared
Single solute component chemical floc is atomized into 5 μm -60 μm of drop, then sprays into electrostatic precipitator and is mixed with flue gas.
Compared with prior art, the invention has the advantages that：
(1) polar functional group of the soluble high-molecular contained by this chemical floc can interact real with fine grained
Connection between existing fine grained, to realize fine grain grow up and excellent flocculation agglomerating effect；
(2) flocculation effect main base of the chemical floc provided by the invention to 5 μm or less fine particles in flue gas
In efficient bridge joint effect of the water soluble polymer with optimization strand extended configuration to fine particle, need not additionally adjust
The parameters such as the surface tension of flocculation solution, electrical enhance its flocculating effect, therefore the flocculant system is independent of surface-active
The use of the additives such as agent, inorganic salts, equipment corrosion and environmental pollution caused by these avoidable additional active components are possible
Problem；
(3) ingredient is simple, and raw material is cheap and easy to get, it is thus possible to significantly reduce use cost；
(4) chemical floc provided by the invention has the surface polarity and dynamic viscosity of optimization, adsorbable to reunite
Heavy metal components in flue gas, to realize the simultaneous removing of flue gas heavy metal pollutant；
(5) flocculant according to the present invention is the boiomacromolecule with good biocompatibility, with polyacrylamide
Traditional flocculant obtained by industrial polymerisation such as amine, which is compared, has lower bio-toxicity.
Specific implementation mode
To make those of ordinary skill in the art fully understand technical scheme of the present invention and advantageous effect, below in conjunction with specific
Embodiment is further described.
A kind of single solute component chemical floc for gas-particle separation is made of water and soluble high-molecular, wherein can
The one kind of soluble macromolecular in pectin, gelatin, polyvinyl alcohol, xanthans, gum arabic, melon bean gum, it is a concentration of
0.002wt%-0.1wt%.
Embodiment 1
Tap water is added in a reservoir, is heated to 60 DEG C, pectin is added in the case of stirring, is configured to quality point
Number is 0.05% homogeneous solution, as single solute component chemical floc.
Metering pump and atomizer are arranged before deduster, which, which is atomized into average diameter, is
Then 10 μm of drop is sprayed into deduster and is met with flue gas, the fine particle in flue gas gradually grow up by flocculation, and then quilt
Subsequent electrostatic precipitator capture.Sampled result at flue outlet shows particle concentration by the flocculant is not used
52g/m3It is reduced to 17g/m3。
Embodiment 2
Tap water is added in a reservoir, is heated to 80 DEG C, xanthans is added in the case of stirring, be configured to quality
The homogeneous solution that score is 0.1%, as single solute component chemical floc.
Metering pump and atomizer are arranged before deduster, which, which is atomized into average diameter, is
Then 15 μm of drop is sprayed into deduster and is met with flue gas, the fine particle in flue gas gradually grow up by flocculation, and then quilt
Subsequent electrostatic precipitator capture.Sampled result at flue outlet shows particle concentration by the flocculant is not used
50g/m3It is reduced to 21g/m3。
Embodiment 3
Tap water is added in a reservoir, is heated to 65 DEG C, gum arabic is added in the case of stirring, be configured to
The homogeneous solution that mass fraction is 0.005%, as single solute component chemical floc.
Metering pump and atomizer are arranged before deduster, which, which is atomized into average diameter, is
Then 25 μm of drop is sprayed into deduster and is met with flue gas, the fine particle in flue gas gradually grow up by flocculation, and then quilt
Subsequent electrostatic precipitator capture.Sampled result at flue outlet shows particle concentration by the flocculant is not used
55g/m3It is reduced to 18g/m3.Contrast test shows the polyacrylamide flocculant handled using identical preparation method and aerosol dispersion
It is only capable of the particle concentration at flue outlet by 55g/m3It is reduced to 37g/m3。
Embodiment 4
Tap water is added in a reservoir, is heated to 50 DEG C, melon bean gum is added in the case of stirring, is configured to matter
The homogeneous solution that score is 0.003% is measured, as single solute component chemical floc.
Metering pump and atomizer are arranged before deduster, which, which is atomized into average diameter, is
Then 30 μm of drop is sprayed into deduster and is met with flue gas, the fine particle in flue gas gradually grow up by flocculation, and then quilt
Subsequent electrostatic precipitator capture.Sampled result at flue outlet shows particle concentration by the flocculant is not used
49g/m3It is reduced to 28g/m3。
Claims (4)
1. a kind of single solute component chemical floc for gas-particle separation is made of water and soluble high-molecular, described solvable
The one kind of property macromolecule in pectin, gelatin, polyvinyl alcohol, xanthans, gum arabic, melon bean gum.
2. a kind of single solute component chemical floc for gas-particle separation according to claim 1, it is characterised in that：
The mass fraction of soluble high-molecular is 0.002%-0.1% in the list solute component chemical floc.
3. a kind of preparation method of single solute component chemical floc for gas-particle separation, which is characterized in that including following step
Suddenly：50-80 DEG C is heated water to first, a certain amount of soluble high-molecular is then added thereto and is stirred evenly, and concentration is obtained
For single solute component chemical floc of 0.002wt%-0.1wt%, the soluble high-molecular is selected from pectin, gelatin, poly- second
One kind in enol, xanthans, gum arabic, melon bean gum.
4. the application method described in claim 1 for single solute component chemical floc of gas-particle separation, which is characterized in that
Include the following steps：Prepared single solute component chemical floc is atomized into 5 μm -60 μm of drop, then sprays into electrostatic
It is mixed with flue gas in deduster.
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| CN201810461882.XA CN108607315A (en) | 2018-05-15 | 2018-05-15 | A kind of single solute component chemical floc and its preparation, application method for gas-particle separation |
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| CN201810461882.XA CN108607315A (en) | 2018-05-15 | 2018-05-15 | A kind of single solute component chemical floc and its preparation, application method for gas-particle separation |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562444A (en) * | 2004-04-10 | 2005-01-12 | 华中科技大学 | Acceleration method of birdnesting ultrafine partieles of coal and equipment |
| CN101513583A (en) * | 2009-02-16 | 2009-08-26 | 华中科技大学 | Coal-fired ultrafine grain chemical agglomeration promotor |
| CN104474830A (en) * | 2014-12-12 | 2015-04-01 | 广东电网有限责任公司电力科学研究院 | Chemical agglomeration promoter for removing fire coal fine particulate matters and application method of chemical agglomeration promoter |
| CN104759347A (en) * | 2015-02-27 | 2015-07-08 | 广东电网有限责任公司电力科学研究院 | Method and device for spray of agglomerator solution by electric dust collector to promote PM2.5 removal |
-
2018
- 2018-05-15 CN CN201810461882.XA patent/CN108607315A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1562444A (en) * | 2004-04-10 | 2005-01-12 | 华中科技大学 | Acceleration method of birdnesting ultrafine partieles of coal and equipment |
| CN101513583A (en) * | 2009-02-16 | 2009-08-26 | 华中科技大学 | Coal-fired ultrafine grain chemical agglomeration promotor |
| CN104474830A (en) * | 2014-12-12 | 2015-04-01 | 广东电网有限责任公司电力科学研究院 | Chemical agglomeration promoter for removing fire coal fine particulate matters and application method of chemical agglomeration promoter |
| CN104759347A (en) * | 2015-02-27 | 2015-07-08 | 广东电网有限责任公司电力科学研究院 | Method and device for spray of agglomerator solution by electric dust collector to promote PM2.5 removal |
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Application publication date: 20181002 |