CN104722165B - A kind of environment-protective process purifying amino acids production tail gas - Google Patents
A kind of environment-protective process purifying amino acids production tail gas Download PDFInfo
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- CN104722165B CN104722165B CN201510094139.1A CN201510094139A CN104722165B CN 104722165 B CN104722165 B CN 104722165B CN 201510094139 A CN201510094139 A CN 201510094139A CN 104722165 B CN104722165 B CN 104722165B
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Abstract
The invention belongs to environmental technology field, disclose a kind of environment-protective process purifying amino acids production tail gas, comprise dedusting and demist, desulfurization is out of stock, and prepares fertilizer.Operation is simple and feasible for present invention process, low in input cost, and treatment effect is good, and fertilizer has been prepared in utilization simultaneously, achieves and turns waste into wealth, kill two birds with one stone.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of environment-protective process purifying amino acids production tail gas.
Background technology
In the process of fermentative preparation of amino acids, can produce a large amount of tail gas, it is boiler exhaust gas mainly.The mixture of boiler exhaust gas mainly gas and flue dust is the main cause polluting residential block air.The composition of flue gas is very complicated, and gas comprises water vapour, sulfur dioxide, hydrocarbon and oxynitrides etc., and flue dust comprises the ash content of fuel, coal grain, oil droplet and high-temperature split product etc.Therefore the pollution of flue gas to environment is the combined pollution of multiple poisonous substance.Flue dust is relevant with the size of particle to the harmfulness of human body, and mostly that endangers human body generation is that diameter is less than the floating dust of 10 microns, especially maximum with the floating dust harmfulness of 1-2.5 micron.
With nitrogen oxide NO
xfor example, denitrating flue gas processing method conventional at present mainly comprises oxidizing process and reducing process, and object is by the NO in flue gas by denitration
xremoving, to reach standard-required.Oxidizing process adds in flue gas by oxidant, makes NO
xbe converted into water-soluble higher nitrogen oxides, then add antalkali and make chemical fertilizer; Its shortcoming is that operating cost is high, and the quality of chemical fertilizer is bad.Reducing process common are SCR and SNCR, and its principle is under the effect of catalyst, by spraying into reducing agent (such as: ammoniacal liquor, urea) by the NO in flue gas
xbe reduced into the N of nontoxic pollution-free
2and H
2o.Its shortcoming is the escape having ammonia when adopting ammoniacal liquor, causes secondary pollution; CO can be increased when using urea
2discharge; These two kinds of method denitration efficiencies are lower, and operating cost is higher.
The wet process of FGD that flue gas desulfurization technique main is at present is desulfurizing agent with lime stone or lime, belongs to chemical method desulfurization, and its operation principle is adopt the SO in the emulsion absorption flue gas of lime stone or lime
2, generate calcium sulfate or gypsum, this technical development is ripe, and desulfuration efficiency is high, can reach 90%, and external desulfurizing industrial fume mainly adopts wet flue gas desulfurization method at present.But the value of the desulfurization existence of wet process of FGD method and calcium sulfate is not high, the difficulty causing recycling or remarket, complex process, the more high defect of maintenance cost.
Along with the enforcement of new environmental law, country is increasing to the concern of field of Environment Protection, and amino acids production enterprise can produce a large amount of tail gas, and direct discharge can cause environmental pollution, how cleaning of off-gas, then qualified discharge, is enterprise's technical problem anxious to be resolved.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of environment-protective process purifying amino acids production tail gas, this technological operation simple possible, low in input cost, treatment effect is good, and fertilizer has been prepared in utilization simultaneously, achieves and turns waste into wealth, kill two birds with one stone.
The present invention is realized by following scheme:
Purify an environment-protective process for amino acids production tail gas, described technique comprises the steps:
1) dedusting and demist: tail gas, first through spraying cooling dedusting, makes exhaust temperature be reduced to less than 35 DEG C, then carries out demist by electrostatic precipitator;
2) desulphurization denitration: the tail gas after demist and chemicals contact pairs, time of contact is 20min, enters microbial reaction room subsequently, and spray composite bacteria agent capable, fountain height is 200mL/NM
3tail gas, the reaction time is 24h, removes residual microorganism, Exhaust Gas finally by microfiltration membranes;
3) fertilizer is prepared: the chemicals after recycling tail gas, with wheat stalk powder, MAP, urea, potassium chloride and water mixing and stirring, join in double-screw extruding pelletizing machine, granulator granulation, be cooled to room temperature, finally spray azotobacter chroococcum, stir, low temperature drying and get final product; Wherein, the mass ratio processing chemicals, wheat stalk powder, MAP, urea, potassium chloride, water and the azotobacter chroococcum after tail gas is 20:10:10:8:5:15:1.
Described chemicals is prepared as follows and forms: get active carbon 4 parts according to weight portion, humic acid potassium 2 parts, 1 part, diatomite, turfy soil 1 part, and ammoniacal liquor 8 parts is for subsequent use; By active carbon, humic acid potassium, diatomite, and turfy soil, mix, and grinding to form particle diameter is 200 object powder, then adds ammoniacal liquor, and 100 turns/min centrifugal mixer 30min, to obtain final product.
Described composite bacteria agent capable is prepared as follows and forms: nitrococcus, Paracoccus denitrificans and Bacillus foecalis alkaligenes are mixed according to the volume ratio of 2:1:1 and be get final product.
The particle diameter of described wheat stalk powder is 200 orders.
Described microfiltration membranes is ceramic micro filter film, and molecular cut off is 5000Da.
Note, in above-mentioned steps, the training method of bacterial classification is not innovative point of the present invention, does not describe in detail herein, and those skilled in the art can to it is documented or the general knowledge of this area is selected conventional culture medium and expands cultural method by root, make viable count reach 10
8individual/ml; Above-mentioned bacterial strains can be bought from commercial sources such as CCTCC and ATCC and obtain.
The beneficial effect that the present invention obtains mainly comprises:
Chemicals and microbial technique combine by the present invention pioneeringly, have effectively purified amino acids production tail gas, and have achieved refuse reclamation, energy-conserving and environment-protective; Chemicals prepared by the present invention possesses absorption and desulfurization off sulfide effect preferably, prepares simply with low cost; The present invention adopts microbiological technique, carries out desulphurization denitration advanced treating, greatly reduce industrial energy consumption to tail gas, and decrease the waste of waste water resource, and cost of investment is low, operating process is simple; The present invention has carried out de-dirt process effectively, and eliminates the residual microorganism in flue gas, avoids secondary pollution; Composite bacteria agent capable prepared by the present invention, compatibility is reasonable, mutually works in coordination with, can reach preferably desulfurization off sulfide effect; The present invention utilizes discarded chemicals to prepare fertilizer, and fertilizer efficiency is better, brings good income, substantially increase the added value of industry of amino acids production enterprise to enterprise.
Detailed description of the invention
Technical scheme in the application is understood better in order to make those skilled in the art person, below in conjunction with the application's specific embodiment, carry out clearly, intactly describing to the present invention, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiment 1
Purify an environment-protective process for amino acids production tail gas, this technique comprises the steps:
1) dedusting and demist: tail gas, first through spraying cooling dedusting, makes exhaust temperature be reduced to less than 35 DEG C, then carries out demist by electrostatic precipitator;
2) desulphurization denitration: chemicals is laid on inner-walls of duct bottom, thickness is 10cm, is contacted by the tail gas after demist with chemicals, and time of contact is 15min, enters microbial reaction room subsequently, and spray composite bacteria agent capable, fountain height is 100mL/NM
3, the reaction time is 24h, and last tail gas removes residual microorganism by microfiltration membranes, Exhaust Gas; Described microorganism formulation can be reused; Described microfiltration membranes is ceramic micro filter film, and molecular cut off is 5000Da;
3) fertilizer is prepared: after chemicals uses 1 month, chemicals after recycling tail gas, with wheat stalk powder, MAP, urea, potassium chloride and water mixing and stirring, join in double-screw extruding pelletizing machine, granulator granulation, is cooled to room temperature, finally sprays azotobacter chroococcum, stir, low temperature drying and get final product; Wherein, the mass ratio processing chemicals, wheat stalk powder, MAP, urea, potassium chloride, water and the azotobacter chroococcum after tail gas is 20:10:10:8:5:15:1;
Described azotobacter chroococcum is (Azotobacterchroococcum) ATCC4412(ProductionofexocellularpolysaccharidebyAzotobac terchroococcum.ApplBiochemBiotechnol.1991Sep; 30 (3): 273-84.); The concentration of this bacterium is 1 × 10
8individual/ml;
The particle diameter of described wheat stalk powder is 100 orders.
Above-mentioned chemicals is prepared as follows and forms: get active carbon 4 parts according to weight portion, humic acid potassium 2 parts, 1 part, diatomite, turfy soil 1 part, and ammoniacal liquor 8 parts is for subsequent use; By active carbon, humic acid potassium, diatomite, and turfy soil, mix, and grinding to form particle diameter is 100 object powder, then adds ammoniacal liquor, and 100 turns/min centrifugal mixer 30min, to obtain final product;
Above-mentioned composite bacteria agent capable is prepared as follows and forms: nitrococcus, Paracoccus denitrificans and Bacillus foecalis alkaligenes are mixed according to the volume ratio of 2:1:1 and be get final product; The original concentration of above-mentioned three kinds of bacterium is 1 × 10
8individual/ml;
Described nitrococcus be specially nitrococcus (
nitrosomonaseuropaea) CCTCCNo:M2010002 (as see CN101955885); Described Paracoccus denitrificans specifically can be Paracoccus denitrificans (Paracoccusdenitrificans) ATCC13543(as see document Genescodingforrespiratorycomplexesmaponallthreechromosom esoftheParacoccusdenitrificansgenome, ArchivesofMicrobiology, 1998); Described Bacillus foecalis alkaligenes (Alcaligenesfaecalis) is for Bacillus foecalis alkaligenes ATCC31555 is (as see document Structuralstudiesofanextracellularpolysaccharide (S-130) elaboratedby
alcaligenesaTCC31555, CarbohydrateResearch, 1986).
Embodiment 2
Purify an environment-protective process for amino acids production tail gas, this technique comprises the steps:
1) dedusting and demist: tail gas, first through spraying cooling dedusting, makes exhaust temperature be reduced to less than 35 DEG C, then carries out demist by electrostatic precipitator;
2) desulphurization denitration: the tail gas after demist contacts with chemicals, time of contact is 20min, enters microbial reaction room subsequently, and spray composite bacteria agent capable, fountain height is 200mL/NM
3tail gas, the reaction time is 24h, and last tail gas removes residual microorganism by microfiltration membranes, Exhaust Gas; Described microorganism formulation can be reused; Described microfiltration membranes is ceramic micro filter film, and molecular cut off is 5000Da;
3) fertilizer is prepared: after chemicals uses two weeks, chemicals after recycling tail gas, with wheat stalk powder, MAP, urea, potassium chloride and water mixing and stirring, join in double-screw extruding pelletizing machine, granulator granulation, is cooled to room temperature, finally sprays azotobacter chroococcum, stir, low temperature drying and get final product; Wherein, the mass ratio processing chemicals, wheat stalk powder, MAP, urea, potassium chloride, water and the azotobacter chroococcum after tail gas is 20:10:10:8:5:15:1;
The concentration of described azotobacter chroococcum is 1 × 10
8individual/ml;
The particle diameter of described wheat stalk powder is 200 orders.
Above-mentioned chemicals is prepared as follows and forms: get active carbon 4 parts according to weight portion, humic acid potassium 2 parts, 1 part, diatomite, turfy soil 1 part, and ammoniacal liquor 8 parts is for subsequent use; By active carbon, humic acid potassium, diatomite, and turfy soil, mix, and grinding to form particle diameter is 200 object powder, then adds ammoniacal liquor, and 100 turns/min centrifugal mixer 30min, to obtain final product;
Above-mentioned composite bacteria agent capable is prepared as follows and forms: nitrococcus, Paracoccus denitrificans and Bacillus foecalis alkaligenes are mixed according to the volume ratio of 2:1:1 and be get final product; The original concentration of above-mentioned three kinds of bacterium is 1 × 10
8individual/ml.
Embodiment 3
Tail gas clean-up effect test: the boiler exhaust gas selecting our company's Preparation of amino acid, adopt the technique of embodiment 1 to process, the unit of each pollutant is mg/Nm
3, concrete outcome is in table 1:
Table 1
| Pollutant type | NOx | SO 2 | Flue dust |
| Before process | 511 | 1209 | 177 |
| After process | 17 | 44 | 5 |
Conclusion: after purified treatment, the concentration of each pollutant reduces greatly, meets discharge standard completely.
Embodiment 4
The manure trial of fertilizer prepared by the present invention: take winter wheat as test crops.Control group: NPK (N16-P16-K16); Test group: fertilizer prepared by embodiment 1;
Test method: the experimental plot area that two groups of fertilizer processes respectively is 10 mu, and control group use amount is 50kg/ mu, and experimental group is 50kg/ mu, and planting conditions is identical, possesses comparativity.Gather in the crops wheat simultaneously, measure wheat per mu yield and rate of growth; Detect wheat grains per spike, mass of 1000 kernel and per mu yield simultaneously.Concrete result of the test: with reference to table 2.
Table 2
| Group | Grain number per spike | Mass of 1000 kernel (g) | Per mu yield (kg) |
| Control group | 33.5 | 45.3 | 439 |
| Test group | 34.7 | 47.8 | 467 |
Conclusion: found by wheat planting test, the fertilizer of test group is good, and the index such as grain number per spike and mass of 1000 kernel is all better than control group.
Although above done detailed explanation with general explanation and detailed description of the invention to this case, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, amendment done without departing from theon the basis of the spirit of the present invention or improvement, all belong to the scope of protection of present invention.
Claims (3)
1. purify an environment-protective process for amino acids production tail gas, it is characterized in that, described technique comprises the steps:
1) dedusting and demist: tail gas, first through spraying cooling dedusting, makes exhaust temperature be reduced to less than 35 DEG C, then carries out demist by electrostatic precipitator;
2) desulphurization denitration: the tail gas after demist and chemicals contact pairs, time of contact is 20min, enters microbial reaction room subsequently, and spray composite bacteria agent capable, fountain height is 200mL/NM
3tail gas, the reaction time is 24h, removes residual microorganism, Exhaust Gas finally by microfiltration membranes;
3) fertilizer is prepared: the chemicals after recycling tail gas, with wheat stalk powder, MAP, urea, potassium chloride and water mixing and stirring, join in double-screw extruding pelletizing machine, granulator granulation, be cooled to room temperature, finally spray azotobacter chroococcum, stir, low temperature drying and get final product; Wherein, the mass ratio processing chemicals, wheat stalk powder, MAP, urea, potassium chloride, water and the azotobacter chroococcum after tail gas is 20:10:10:8:5:15:1;
Described chemicals is prepared as follows and forms: get active carbon 4 parts according to weight portion, humic acid potassium 2 parts, 1 part, diatomite, turfy soil 1 part, and ammoniacal liquor 8 parts is for subsequent use; By active carbon, humic acid potassium, diatomite, and turfy soil, mix, and grinding to form particle diameter is 200 object powder, then adds ammoniacal liquor, and 100 turns/min centrifugal mixer 30min, to obtain final product;
Described composite bacteria agent capable is prepared as follows and forms: nitrococcus, Paracoccus denitrificans and Bacillus foecalis alkaligenes are mixed according to the volume ratio of 2:1:1 and be get final product.
2. technique according to claim 1, is characterized in that, the particle diameter of described wheat stalk powder is 200 orders.
3. technique according to claim 1, is characterized in that, described microfiltration membranes is ceramic micro filter film, and molecular cut off is 5000Da.
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| CN105854505A (en) * | 2016-06-14 | 2016-08-17 | 内蒙古阜丰生物科技有限公司 | Flue gas desulfurization and denitrification method in amino acid production process |
| CN105879568B (en) * | 2016-06-15 | 2018-07-17 | 内蒙古阜丰生物科技有限公司 | A kind of preparation and preparation method thereof for flue gas desulfurization denitration dust-removing |
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| CN109985512A (en) * | 2017-12-31 | 2019-07-09 | 许传高 | Flue gas treating process during amino acids production |
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| CN109985513A (en) * | 2017-12-31 | 2019-07-09 | 许传高 | It is a kind of for purifying the biochemical method of amino acids production flue gas |
| CN108786406A (en) * | 2018-07-03 | 2018-11-13 | 山东寿光巨能金玉米开发有限公司 | A kind of purification method of amino acids production tail gas |
| CN109621695A (en) * | 2018-10-16 | 2019-04-16 | 许传高 | Tail gas treatment process during production of corn starch |
| CN109621694A (en) * | 2018-10-16 | 2019-04-16 | 许传高 | The treatment process of amino acid fermentation generation tail gas |
| CN111569640A (en) * | 2020-05-21 | 2020-08-25 | 赵兰坤 | Threonine fermentation tail gas environment-friendly treatment process |
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