CN110102177A - A kind of technique purifying slurry-spraying pelletizing flue gas - Google Patents
A kind of technique purifying slurry-spraying pelletizing flue gas Download PDFInfo
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- CN110102177A CN110102177A CN201910279827.3A CN201910279827A CN110102177A CN 110102177 A CN110102177 A CN 110102177A CN 201910279827 A CN201910279827 A CN 201910279827A CN 110102177 A CN110102177 A CN 110102177A
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Abstract
The invention belongs to a kind of techniques for purifying slurry-spraying pelletizing flue gas, it uses microorganism formulations, the microorganism formulation is prepared in accordance with the following steps: absorption carrier and composite bacteria liquid are stirred according to the mass ratio of 3-4:2-3, it is placed in 30 DEG C of culture 6-18h, then it is dried, drying temperature is 15-20 DEG C, and water content is 6-10wt% after drying, packaging to get.Absorption carrier of the present invention is good to the adsorption effect of bacterium, and synergy is good between each bacterial strain, and the effect of purification slurry-spraying pelletizing flue gas is mutually due for promotion.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of technique for purifying slurry-spraying pelletizing flue gas.
Background technique
Slurry-spraying pelletizing is the method that fine particle is directly produced from solution or slurry by means of evaporation, including spraying and dry
Dry two processes.Slurry is sprayed the microlayer model that nebulizes first, and after moisture is taken away by hot-air evaporation, the solid formation in drop is poly-
It is integrated into dry particle.To being some tens of pm to hundreds of microns with micron or Submicro particles preparation average grain diameter
For fine particle, slurry-spraying pelletizing is almost unique effective ways.Prepared particle almost spherical has certain granularity point
Cloth.Entire granulation process all carries out in closed system, and no dust and impurity pollution, therefore, this method is mostly by food, doctor
The industries such as medicine, dyestuff, nonmetallic ore processing, catalyst and washing powder use.The disadvantage is that water evaporation quantity is big, nozzle wear is tight
Weight, and generate more tail gas.
Compound fertilizer workshop is during producing compound fertilizer using amino acid waste liquid, using spray granulation, tail
Composition is more complex in gas, mainly there is floating dust, dust and tiny compound fertilizer granules, and gas main ingredient is brought by fire coal
The gas of a large amount of toxic, irritant smells.Predominant gas composition has hydrogen sulfide, sulfur dioxide, ammonia nitrogen, ketone, aldehydes, ester
Class, benzene class dust, vapor etc..Especially in rainy days or lower air pressure, plant area and neighbouring resident living area smog are often resulted in
Boundless and indistinct, the harm of acid mist and acid rain is quite serious, the rule of the concentration of emission of flue dust and exhaust gas considerably beyond national emission standard
It is fixed, biggish negative effect is generated to environment and human body, so compound fertilizer workshop treating tail gas is very urgent, it is necessary to carry out
It administers.How to reduce slurry-spraying pelletizing flue gas is our very urgent technical issues that need to address.
Research for slurry-spraying pelletizing flue gas, applicant have carried out more elaboration in patented technology before, for example,
Patented technology " CN201610508054, a kind of processing method of slurry-spraying pelletizing tail gas cooling and deodorizing desulphurization denitration " discloses one kind
The processing method of slurry-spraying pelletizing tail gas cooling and deodorizing desulphurization denitration, includes the following steps: slurry-spraying pelletizing tail gas first through venturi
Spray column and electrostatic precipitator cooling dedusting, then by plasma reactor taste removal, then by ozone generator, finally enter
Desulphurization denitration processing is carried out in reactor equipped with adsorbent, after being disposed, discharge；Wherein adsorbent uses multiple material system
It is standby and obtain, have preferable adsorption effect；But the adsorbent reactivation ability can generate a large amount of discarded with regard to poor after use
Object causes the wasting of resources.Before applicant patented technology " CN201410586080, it is harmful in a kind of removal boiler smoke
The method of gas " discloses the method using chemicals and bacteria agent Combined Treatment flue gas pernicious gas, and this method needs
Using two kinds of preparations, and four kinds of microorganisms is used to carry out compatibility in bacteria agent, has be easy to cause pollution, and technological parameter
It is complex, it is difficult to grasp for general enterprises.In view of the studies above achievement, applicant has found still in the actual operation process
So have the defects that certain, such as bacterial strain is more, and culture processes are cumbersome, once pollution, which occurs, for a certain bacterium will result in entire work
Skill can not be implemented, and adhesion amount of the bacterial strain on carrier is still to be improved.
Research achievement " a method of reduce slurry-spraying pelletizing tail gas peculiar smell " before applicant, is purified using biological agent
Slurry-spraying pelletizing flue gas is absorbed, which is prepared by carrier and composite bacteria liquid.On the basis of the technology, applicant after
It is continuous that bacterial strain compatibility is studied and improved.
Summary of the invention
In order to overcome the drawbacks of the prior art, the purpose of the present invention is to provide a kind of works for purifying slurry-spraying pelletizing flue gas
Skill has used microorganism formulation in the technique, and said preparation includes absorption carrier and compound bacteria, and carrier is good to the adsorption effect of bacterium,
Synergy is good between each bacterial strain, and the effect of purification slurry-spraying pelletizing flue gas is mutually due for promotion.
To achieve the above object, the invention provides the following technical scheme:
A kind of technique purifying slurry-spraying pelletizing flue gas, which is characterized in that the technique has used microorganism formulation.
Further,
The microorganism formulation is prepared in accordance with the following steps: by absorption carrier and composite bacteria liquid according to the quality of 3-4:2-3
Than being stirred, 30 DEG C of culture 6-18h are placed in, are then dried, drying temperature is 15-20 DEG C, and water content is 6- after drying
10wt%, packaging to get.
Further,
The preparation method of the absorption carrier includes the following steps: to put into stalk in pulverizer, smashes it through 100 meshes,
Obtain straw powder；Clinker is put into pulverizer, 50 meshes is smashed it through, obtains pulverized slag；By straw powder, pulverized slag, recessed
Convex stick soil and phosphoric acid solution are added in reaction kettle according to the mass ratio of 5:10:1:12, and 300rpm stirs 10min, then makes
Grain, then be placed under the conditions of 100 DEG C, 30min is dried, absorption carrier is made.
Further, the preparation method of the composite bacteria liquid includes the following steps: micrococcus luteus seed liquor, oxidation wood
Sugared achromobacter seed liquor and Acidithiobacillus ferrooxidans strain GF seed liquor are mixed according to the volume ratio of 3:2:5 to get compound bacteria
Liquid.
Further, the concentration of the phosphoric acid solution is 0.1mol/L；The partial size of the attapulgite is 200 mesh.
Preferably, the preparation method of the micrococcus luteus seed liquor includes the following steps: for micrococcus luteus to be inoculated into
Seed culture medium, 30 DEG C of culture viable counts into product reach 2.0 × 108Cfu/ml is to get micrococcus luteus seed liquor；It is described
The component of seed culture medium are as follows: yeast extract 5g/L, (NH4) 2SO42g/L g, glucose 3g/L, K2HPO40.5g/L, KH2PO4
0.5g/L。
Preferably, the preparation method of the Achromobacter xylosoxidans seed liquor include the following steps: will to aoxidize xylose without
Color bacillus is inoculated into seed culture medium, and 28 DEG C of culture viable counts into product reach 1.0 × 108Cfu/ml is to get oxidation xylose
Achromobacter seed liquor；The seed culture based component are as follows: urea 1.0g/L, CH3COONa 3.0g/L, MgC12 0.1g/L,
CaC120.1g/L, KH2 PO40.5g/L, K2 HPO4 0.5g/L。
Preferably, the preparation method of the Acidithiobacillus ferrooxidans strain GF seed liquor includes the following steps: to aoxidize acidophilus
Ferrous Thiobacillus is inoculated into seed culture medium, and 28 DEG C of culture viable counts into bacterium solution reach 5.0 × 108Cfu/ml is to get acidophilus
Thiobacillus ferrooxidans seed liquor；The seed culture medium component are as follows: (NH4)2SO42g/L, KCl 0.1g/L, K2HPO4
0.5g/L, KH2PO40.5g/L, Ca (NO3)20.01g/L, FeSO4·7H2O 10g/L。
Strain of the present invention belongs to known bacterial strain, can be commercially available from commercial sources such as ATCC.Of the invention
The seed liquor preparation of each strain belongs to the routine culture mode of this field, is not innovative point of the present invention, is not described in detail herein.The present invention
Raw material or reagent used is commercially available in addition to special instruction.
The beneficial effect that the present invention obtains mainly includes but is not limited to the following aspects:
The present invention adsorbs tail gas by absorption carrier, then by microbial reaction by the pollutant removal in tail gas,
So that absorption carrier can be adsorbed effectively again, without frequently replacement, cost and operating process are saved；The present invention
The more conventional adsorption effect of activated carbon in water of microorganism formulation is more preferable, and service life also greatly prolongs；In carrier preparation process, clinker category
In trade waste, absorption property is good, has a gap structure, but meta-alkalescence, has certain inhibiting effect to bacterial strain, passes through phosphorus
Acid solution is modified it, reduces basicity, improves adhesion effect；Straw powder can build the micro-loop of suitable Strain survival
Border provides certain carbon source for bacterial strain；Attapulgite has unique dispersion, high temperature resistant, corrosion-resistant good property and higher
Adsorption capacity, be also equipped with preferable adhesive effect；It is granulated, is advantageously formed many using the different substance of particle size
Gap structure.
Three kinds of bacterial strains are selected to carry out compatibility in microorganism formulation of the present invention；Wherein, Thiobacillus ferrooxidans has preferably
Desulfidation；Micrococcus luteus belongs to heterotrophism denitrifier, and Achromobacter xylosoxidans belong to aerobic denitrifying bacteria, can slough nitrogen
Oxide；Contain a certain amount of oxygen in flue gas, but concentration is lower, and under low concentration aerobic conditions, spy is formd in carrier
The microorganism system that some heterotrophism denitrifiers, aerobic denitrifying bacteria and Thiobacillus coexist, symbiosis of mutually promoting, synergy
It is good；
The bacterial strain that the present invention uses is less, and Operating parameters are relatively easy, reduces the risk of bacterial strain pollution, and carrier is former
Expect more cheap, the opposite mitigation of business burden, application prospect is good.
Detailed description of the invention
Fig. 1: the gas cleaning index of different disposal group；
Fig. 2: different strains combine the influence to gas cleaning effect.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, having below in conjunction with the application
Body embodiment more clearly and completely describes the present invention, it is clear that described embodiment is only the application one
Divide embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making
Every other embodiment obtained, should fall within the scope of the present invention under the premise of creative work.
Embodiment 1
A kind of technique purifying slurry-spraying pelletizing flue gas, includes the following steps:
It first passes around spray scrubber and carries out spray washing, cooling processing is to 35 DEG C, subsequently into anti-equipped with microorganism formulation
Answer progress gas cleaning processing in room, after being disposed, discharge；
The microorganism formulation is prepared according to following technique:
1) it prepares absorption carrier: stalk is put into pulverizer, smash it through 100 meshes, obtain straw powder；Clinker is put into
Into pulverizer, 50 meshes are smashed it through, pulverized slag is obtained；By straw powder, pulverized slag, attapulgite and phosphoric acid solution according to
The mass ratio of 5:10:1:12 is added in reaction kettle, and 300rpm stirs 10min, is granulated subsequently into roller pelletizer, controls grain
Diameter is 2mm, then is placed under the conditions of 100 DEG C, and 30min is dried, and absorption carrier is made；The concentration of the phosphoric acid solution is 0.1mol/
L；The partial size of the attapulgite is 200 mesh；
2) composite bacteria liquid is prepared:
Micrococcus luteus ATCC 10240 is inoculated into seed culture medium, 30 DEG C of culture viable counts into product reach 2.0 ×
108Cfu/ml is to get micrococcus luteus seed liquor；The component of the seed culture medium are as follows: yeast extract 5g/L, (NH4) 2SO4 2g/
L g, glucose 3g/L, K2HPO40.5g/L, KH2PO40.5g/L；
Achromobacter xylosoxidans ATCC 27061 is inoculated into seed culture medium, 28 DEG C of culture viable counts into product reach
1.0×108Cfu/ml is to get Achromobacter xylosoxidans seed liquor；The seed culture based component are as follows: urea 1.0g/L, CH3
COONa 3.0g/L, MgC12 0.1g/L, CaC120.1g/L, KH2 PO40.5g/L, K2 HPO40.5g/L；
Acidithiobacillus ferrooxidans strain GF ATCC 23270 is inoculated into seed culture medium, 28 DEG C of culture viable counts into bacterium solution reach
To 5.0 × 108Cfu/ml is to get Acidithiobacillus ferrooxidans strain GF seed liquor；The seed culture medium component are as follows: (NH4)2SO4
2g/L, KCl 0.1g/L, K2HPO40.5g/L, KH2PO40.5g/L, Ca (NO3)20.01g/L, FeSO4·7H2O 10g/L；
By micrococcus luteus seed liquor, Achromobacter xylosoxidans seed liquor and Acidithiobacillus ferrooxidans strain GF seed liquor according to
The volume ratio of 3:2:5 mixes to get composite bacteria liquid；
3) carrier and composite bacteria liquid are stirred according to the mass ratio of 3:2, are placed in 30 DEG C of culture 12h, are then dried, done
Dry temperature is 20 DEG C, it is dry after water content be 10wt%, packaging to get.
Embodiment 2
A kind of technique purifying slurry-spraying pelletizing flue gas, includes the following steps:
It first passes around spray scrubber and carries out spray washing, cooling processing is to 33 DEG C, subsequently into anti-equipped with microorganism formulation
Answer progress gas cleaning processing in room, after being disposed, discharge；
The microorganism formulation is prepared according to following technique:
1) it prepares absorption carrier: stalk is put into pulverizer, smash it through 100 meshes, obtain straw powder；Clinker is put into
Into pulverizer, 50 meshes are smashed it through, pulverized slag is obtained；By straw powder, pulverized slag, attapulgite and phosphoric acid solution according to
The mass ratio of 5:10:1:12 is added in reaction kettle, and 300rpm stirs 10min, is granulated subsequently into roller pelletizer, controls grain
Diameter is 2-3mm, then is placed under the conditions of 100 DEG C, and 30min is dried, and absorption carrier is made；The concentration of the phosphoric acid solution is
0.1mol/L；The partial size of the attapulgite is 200 mesh；
2) composite bacteria liquid is prepared:
Micrococcus luteus ATCC 10240 is inoculated into seed culture medium, 30 DEG C of culture viable counts into product reach 2.0 ×
108Cfu/ml is to get micrococcus luteus seed liquor；The medium component are as follows: the component of seed culture medium are as follows: yeast extract 5g/
L, (NH4) 2SO42g/L g, glucose 3g/L, K2HPO40.5g/L, KH2PO40.5g/L；
Achromobacter xylosoxidans ATCC27061 is inoculated into seed culture medium, 28 DEG C of culture viable counts into product reach 1.0
×108Cfu/ml is to get Achromobacter xylosoxidans seed liquor；The medium component are as follows: urea 1.0g/L, CH3 COONa
3.0g/L, MgC12 0.1g/L, CaC120.1g/L, KH2 PO40.5g/L, K2 HPO40.5g/L；
Acidithiobacillus ferrooxidans strain GF ATCC 23270 is inoculated into seed culture medium, 28 DEG C of culture viable counts into bacterium solution reach
To 5.0 × 108Cfu/ml is to get Acidithiobacillus ferrooxidans strain GF seed liquor；The seed culture medium component are as follows: (NH4)2SO4
2g/L, KCl 0.1g/L, K2HPO40.5g/L, KH2PO40.5g/L, Ca (NO3)20.01g/L, FeSO4·7H2O 10g/L；
By micrococcus luteus seed liquor, Achromobacter xylosoxidans seed liquor and Acidithiobacillus ferrooxidans strain GF seed liquor according to
The volume ratio of 2:1:3 mixes to get composite bacteria liquid；
3) carrier and composite bacteria liquid are stirred according to the mass ratio of 2:1, are placed in 30 DEG C of culture 12h, are then dried, done
Dry temperature is 20 DEG C, it is dry after water content be 8wt%, packaging to get.
Embodiment 3
The slurry-spraying pelletizing flue gas in the abundant rich slurry-spraying pelletizing workshop in selection Inner Mongol is handled, and the exhaust gas component after spray is as follows:
H2S is 146.7mg/Nm3, SO2For 139.4mg/Nm3, NOx 167.1mg/Nm3, temperature is 33 DEG C, air speed 5000h-1；
Comparative example 1 is arranged: comparative example 1: only with absorption carrier, not adding composite bacteria liquid, remaining is the same as embodiment 1；Comparative example 2:
Absorption carrier selects diatomite, remaining is the same as embodiment 1；Comparative example 3: absorption carrier selects clinker, remaining is the same as embodiment 1.Experiment
The group selection embodiment of the present invention 1.
The setting processing time is 60min, measures the removal rate of each pollutant, as shown in Figure 1, comparative example 1 is only with changing
Property carrier, eliminates the flue gas pollutant of part, but treatment effect is obviously poorer than comparative example 2-3 and experimental group, at pollutant
Reason is not thorough enough, illustrates that composite bacteria liquid plays important purification function；With comparative example 2-3 using conventional diatomite support or not
Modified clinker carrier is compared, and experimental group of the present invention improves the attachment of absorption property and bacterial strain by improving to clinker
Power is conducive to bacterial strain and plays biochemical reaction, the pollutant in flue gas is completely removed and purified.
Embodiment 4
The synergistic effect of each bacterial strain in composite bacteria liquid of the present invention.
Selecting the slurry-spraying pelletizing flue gas in the abundant rich slurry-spraying pelletizing workshop in Inner Mongol, (flue gas used with embodiment 3 is with a collection of
It is secondary)；Different bacterial strain combinations, combination 1: micrococcus luteus+Achromobacter xylosoxidans are set；Combination 2: micrococcus luteus+thermophilic
Acid oxidase ferrous iron Thiobacillus；Combination 3: Achromobacter xylosoxidans+Acidithiobacillus ferrooxidans strain GF；Combination 4: micrococcus luteus+
Achromobacter xylosoxidans+Acidithiobacillus ferrooxidans strain GF.As shown in Fig. 2, being compared with 1-3 is combined using two kinds of bacterial strain compatibilities
Compared with combining in 4 microorganism formulation and three kinds of bacterial strains selected to carry out compatibilities, wherein Thiobacillus ferrooxidans has preferable desulfurization
Effect；Micrococcus luteus belongs to heterotrophism denitrifier, and Achromobacter xylosoxidans belong to aerobic denitrifying bacteria, can slough nitrogen oxidation
Object；Contain a certain amount of oxygen in flue gas, but concentration is lower, forms under low concentration aerobic conditions, in carrier distinctive
The microorganism system that heterotrophism denitrifier, aerobic denitrifying bacteria and Thiobacillus coexist, symbiosis of mutually promoting, synergy is good, right
Pollutant in flue gas has carried out thorough purification, and energy-saving and emission-reduction are environment friendly and pollution-free.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Although the embodiments of the present invention has been shown and described above, Ke Yili
Solution, above-described embodiment are exemplary, are not considered as limiting the invention, and those skilled in the art are at this
It can make changes, modifications, alterations, and variations to the above described embodiments in the range of invention.
Claims (8)
1. a kind of technique for purifying slurry-spraying pelletizing flue gas, which is characterized in that the technique has used microorganism formulation.
2. technique according to claim 1, which is characterized in that the microorganism formulation is prepared in accordance with the following steps:
Absorption carrier and composite bacteria liquid are stirred according to the mass ratio of 3-4:2-3,30 DEG C of culture 6-18h is placed in, is then done
Dry, drying temperature is 15-20 DEG C, it is dry after water content be 6-10wt%, packaging to get.
3. technique according to claim 2, which is characterized in that the preparation method of the absorption carrier includes the following steps:
Stalk is put into pulverizer, 100 meshes is smashed it through, obtains straw powder；Clinker is put into pulverizer, is crushed
50 meshes are crossed afterwards, obtain pulverized slag；By straw powder, pulverized slag, attapulgite and phosphoric acid solution according to the quality of 5:10:1:12
Than being added in reaction kettle, 300rpm stirs 10min, is then granulated, then be placed under the conditions of 100 DEG C, dries 30min, is made and inhales
Appendix body.
4. technique according to claim 2, which is characterized in that the preparation method of the composite bacteria liquid includes the following steps:
By micrococcus luteus seed liquor, Achromobacter xylosoxidans seed liquor and Acidithiobacillus ferrooxidans strain GF seed liquor according to 3:2:
5 volume ratio mixes to get composite bacteria liquid.
5. technique according to claim 3, which is characterized in that the concentration of the phosphoric acid solution is 0.1mol/L；It is described recessed
The partial size of convex stick soil is 200 mesh.
6. technique according to claim 4, which is characterized in that the preparation method of the micrococcus luteus seed liquor includes such as
Lower step: micrococcus luteus is inoculated into seed culture medium, 30 DEG C of culture viable counts into product reach 2.0 × 108Cfu/ml,
Up to micrococcus luteus seed liquor；The component of the seed culture medium are as follows: yeast extract 5g/L, (NH4) 2SO42g/L g, grape
Sugared 3g/L, K2HPO40.5g/L, KH2PO4 0.5g/L。
7. technique according to claim 4, which is characterized in that the preparation method of the Achromobacter xylosoxidans seed liquor
Include the following steps: for Achromobacter xylosoxidans to be inoculated into seed culture medium, 28 DEG C of culture viable counts into product reach 1.0
×108Cfu/ml is to get Achromobacter xylosoxidans seed liquor；The seed culture based component are as follows: urea 1.0g/L, CH3
COONa 3.0g/L, MgC12 0.1g/L, CaC120.1g/L, KH2 PO40.5g/L, K2 HPO4 0.5g/L。
8. technique according to claim 4, which is characterized in that the preparation side of the Acidithiobacillus ferrooxidans strain GF seed liquor
Method includes the following steps: for Acidithiobacillus ferrooxidans strain GF to be inoculated into seed culture medium, cultivates into bacterium solution viable counts for 28 DEG C and reach
To 5.0 × 108Cfu/ml is to get Acidithiobacillus ferrooxidans strain GF seed liquor；The seed culture medium component are as follows: (NH4)2SO4
2g/L, KCl 0.1g/L, K2HPO40.5g/L, KH2PO40.5g/L, Ca (NO3)20.01g/L, FeSO4·7H2O 10g/L。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110499262A (en) * | 2018-05-17 | 2019-11-26 | 卢松 | Purification absorbs the compound of slurry-spraying pelletizing flue gas |
| CN110938571A (en) * | 2019-09-17 | 2020-03-31 | 赵兰坤 | Biological agent for treating tail gas of guniting granulation |
| CN111298636A (en) * | 2019-09-17 | 2020-06-19 | 赵兰坤 | Method for treating tail gas generated in amino acid spraying granulation |
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| CN111298636A (en) * | 2019-09-17 | 2020-06-19 | 赵兰坤 | Method for treating tail gas generated in amino acid spraying granulation |
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