CN104923001B - Dedusting composition, desulfurization compositions and purposes - Google Patents

Dedusting composition, desulfurization compositions and purposes Download PDF

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CN104923001B
CN104923001B CN201510303583.XA CN201510303583A CN104923001B CN 104923001 B CN104923001 B CN 104923001B CN 201510303583 A CN201510303583 A CN 201510303583A CN 104923001 B CN104923001 B CN 104923001B
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dedusting
dedusting composition
surfactant
composition
fatty
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CN104923001A (en
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童裳慧
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Zhongjing New Materials Co.,Ltd.
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Beijing Zhongjing Environment Technology Co Ltd
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Abstract

The invention discloses a kind of dedusting composition, desulfurization compositions and purposes.The dedusting composition of the present invention includes sulfonate surfactant;Carboxylate surfactant;Sulfuric ester salt form surfactant;Non-ionic antistatic agent;And PAMA.The dedusting composition dust removing effects of the present invention is excellent.

Description

Dedusting composition, desulfurization compositions and purposes
Technical field
The present invention relates to a kind of dedusting composition, desulfurization compositions and purposes, in particular for flue gas wet desulphurization process Dedusting composition, desulfurization compositions and application thereof.
Background technology
China is the energy resource consumption big country based on coal, simultaneously Ye Shi iron and steel big producing country.In the end of the year 2006, China's fire coal is sent out Electricity installed capacity reaches 4.84 hundred million kilowatts, coal-fired 1,200,000,000 tons, smoke discharge amount about 3,000,000 tons, and the most about 2,700,000 tons The ultra tiny dust of PM10 is the most floating in atmosphere, and particularly PM2.5 is present in air with aerosol form, has a strong impact on Atmospheric visibility and air quality.Steel industry dust discharge amount accounts for the 25% of China's industrial dust discharged total amount, sintering industry Soot emissions account for the 40% more than of steel manufacture process total release.
Owing to recognizing the harm of flue dust, China has made the strictest discharge standard, opens on July 1st, 2014 Begin " fossil-fuel power plant atmospheric pollutant emission standard (the GB 13223-2011) " performed, it is stipulated that existing thermal power generation coal-burning boiler Chimney breast soot emissions limit value, the whole nation is 30mg/m3, the special emission limit in key area is 20mg/m3;" steel sintering, ball Group's industrial air pollution thing discharge standard (GB 28662-2012) " specify existing sintering machine ball, group's roasting apparatus is granular material discharged Limit value is 50mg/m3, rear of sintering machine emission limit is 30mg/m3
The flue gas that coal-burning boiler and sintering machine are got rid of, it usually needs just can enter after dedusting, desulfurization etc. process Air.In the smoke processing system of a kind of wide variety of coal-burning boiler or sintering machine, flue gas first passes around cleaner, main If sack cleaner or electrostatic precipitator complete dedusting;Desulfurization process is carried out subsequently into desulphurization plant.
Sack cleaner utilizes solid or liquid particle in porous filter medium separation and collection gas, and its dust removal process is to depend on The dust bonding layer formed after running a period of time by filter medium is main filtration layer, and filter material layer own plays the bone of dust bonding layer Frame effect.Its principle includes: sieving, inertial collision, intercepts, diffusion, electrostatic and gravitational settling.Sack cleaner dust removing effects Good, no matter but how high its efficiency is, and the particulate matter major part of discharge is both less than 2.5 μm.
Electrostatic precipitator operation principle is to utilize high voltage electric field to make particulate matter charged, Coulomb force act under make particulate matter with Air-flow separates sedimentation.Electrostatic precipitation drag losses is little, it is allowed to operation temperature is high, and it is big to process air range amount, but has dust Certain selectivity, to the particulate matter more than 10 μm, ESP Efficiency is the highest, but when particulate matter diameter is less than 2 μ During m, efficiency of dust collection will be remarkably decreased, and efficiency of dust collection can be less than 90%, in extreme circumstances, efficiency even can drop to 50% with Under, from electric cleaner emit quantity most be exactly the subparticle of 0.2~2 μm.
Owing to conventional high-effective dust-removing equipment, such as sack cleaner or electrostatic precipitator are less than the micro-of 2.5 μm for particle diameter Fine particle can not effectively trap, and therefore in the flue gas after bag-type dusting or electrostatic precipitation, the content of particulate matter is still 100 ~200mg/m3, do not meet discharge standard.
Being currently used for making up the two can not one of the new technology of qualified discharge be wet static dedusting, and its operation principle is: Ambient gas, under high direct voltage effect, is ionized by metal discharge line, and dust is charged in power plant, to collection under electric field force effect Dirt polar motion, when reaching dust collecting electrode surface, flows down with liquid film and is removed.Wet electrical dust precipitator to acid mist, toxic heavy metal with And the fine dust of PM10, especially PM2.5 has good removal effect.Therefore, when being applied to coal-burning power plant, sintering machine, wet Formula electric cleaner is for removing SO after wet desulphurization3, water droplet and flue dust effect clearly.
But, after wet cottrell must be placed in desulphurization plant, the flue gas that i.e. coal-burning boiler or sintering machine are got rid of Need to first pass around desulphurization plant and carry out desulfurization, then could enter wet cottrell and carry out dedusting, thus can increase de- The running resistance of sulphur equipment.Further, it uses closing circulation irrigating water, need to constantly fill into former water, discharges waste water, increases desulfurization Systematic water balance difficulty.Additionally, the technical costs of wet electrical dust precipitator single product is high, equipment investment expense is higher than common electrostatic In deduster, and running in addition to the power consumption of deduster own, the water circulating pump of auxiliary etc. also can consume part electricity, rinses In water, additive also increases a part of operating cost, and therefore it puts into and operating cost is the most prohibitively expensive.
CN104014210A discloses and a kind of uses liquid membrane emulsion technology to remove the method for dust in flue gas, but emulsion Film preparation complex process, and be not suitable for using with other slurry combination, range of application is narrower.
CN104355386A discloses a kind of composite flocculation agent being made up of polyacrylamide and polyacrylamide sodium, but its Can not effectively remove particle diameter fine particulates below 2.5 μm.
CN103721550A discloses a kind of flue gas and desulfurizing and denitrifying and takes off VOCs absorbent, including ammonium salt (ammonium chloride, carbon Acid ammonium, triethanolamine and urea) 5~10%, surfactant (castor oil sodium sulfonate, aliphatic alcohol polyethenoxy polypropylene ether, tells Temperature-20 and Span-20) 0.01~0.50%, complexing agent (ethylenediamine tetra-acetic acid ferrous complex, aminotriacetic acid ferrous iron be complexed Thing and six cobaltammines) 1 ‰~2% and excess water.The while that this absorbent can be implemented in a set of equipment in high-efficient purification flue gas SO2、NOXWith VOCs etc., but dust removing effects still await improve.
Summary of the invention
The first object of the present invention is to provide a kind of dedusting composition, is used for removing in flue gas by this dedusting composition Particulate matter, dust removing effects is excellent.If currently preferred dedusting composition to be blended in the desulfurization slurry of wet desulphurization equipment In, while wet type desulfurizing operates, can effectively remove particle diameter less than 10 μm, the fine particulates of particularly 2.5 μm, it is achieved Flue dust qualified discharge.
The second object of the present invention is to provide a kind of desulfurization compositions, and said composition has desulfurization simultaneously and dedusting is made With.
The third object of the present invention is to provide the purposes of a kind of dedusting composition, uses this to remove during fume treatment Dirt composition, can be capable of flue dust qualified discharge without using wet cottrell simultaneously.
The present invention provides a kind of dedusting composition, including following components:
Sulfonate surfactant;
Carboxylate surfactant;
Sulfuric ester salt form surfactant;
Non-ionic antistatic agent;With
PAMA.
According to dedusting composition of the present invention, it is preferable that in terms of 100 weight portion dedusting compositions, including following heavy The component of amount part:
Sulfonate surfactant 30~70 weight portion;
Carboxylate surfactant 3~25 weight portion;
Sulfuric ester salt form surfactant 3~20 weight portion;
Non-ionic antistatic agent 3~18 weight portion;
PAMA 10~30 weight portion.
According to dedusting composition of the present invention, it is preferable that described sulfonate surfactant is selected from following thing One or more in matter: alkylsulfonate, alkylbenzenesulfonate, alkylnaphthalene sulfonate, alpha-alkene sulfonate, alpha-sulfo list carboxylic Hydrochlorate, the sulfoalkyl ester of aliphatic acid, sulphosuccinates, lignosulfonates, alkyl glyceryl ether sulfonate, alkyl diphenyl ether Disulfonate.
According to dedusting composition of the present invention, it is preferable that described carboxylate surfactant includes amino acid Type surfactant or soap.
According to dedusting composition of the present invention, it is preferable that described amino acid type surfactant is selected from following thing One or more in matter: fatty acyl group NaAsp, fatty acyl group-N-beta-hydroxyethyl-Sodium Glycinate, N-fatty acyl group flesh Propylhomoserin sodium, N-fatty acyl group polypeptide.
According to dedusting composition of the present invention, it is preferable that described sulfuric ester salt form surfactant is selected from following One or more in material: saturated fatty alcohol sulfuric acid, unsaturated fatty alcohol sulfuric ester, secondary alkyl sulphate salt.
According to dedusting composition of the present invention, it is preferable that described non-ionic antistatic agent is selected from aliphatic acid Ethylene oxide adduct, the ethylene oxide adduct of fatty alcohol, the ethylene oxide adduct of alkyl phenol, ethoxylated fatty amine, Ethoxylated fatty amides, monoethanolamine-glycidol ether.
According to dedusting composition of the present invention, it is preferable that described ethoxylated fatty amine is selected from ethoxylation fat Fat kiber alkyl amine, ethoxylated fat alkyl secondary amine, ethoxylation N-fatty alkyl-1,3-trimethylene diamines.
The present invention also provides for a kind of desulfurization compositions, and described desulfurization compositions comprises following components:
Desulfurization slurry;With
Dedusting composition as above;
Wherein, this dedusting composition accounts for 0.01wt%~0.1wt% of desulfurization slurry.
The present invention also provides for the purposes of above-mentioned dedusting composition, and it is for removing in the flue gas entering wet desulphurization equipment Particulate matter
The dedusting composition of the present invention is used for the particulate matter removing in flue gas, and its dust removing effects is good.According to the present invention Preferably technical scheme, adds dedusting composition of the present invention in the desulfurization slurry of desulphurization plant, flue gas is carried out desulfurization process While can effectively remove the sack cleaner of early stage or the inexpungible particle diameter of the electrostatic precipitator particulate matter less than 10 μm, Particularly particle diameter is less than the fine particulates of 2.5 μm, thus realizes flue dust qualified discharge, and therefore can to substitute wet type quiet for the present invention Electric cleaner, saves due to the equipment investment needed for using this equipment, supporting flushing water system, has saved water power energy consumption. And the dedusting composition of the present invention is cheap, easy to use.
Detailed description of the invention
Below the detailed description of the invention of the present invention is described in further details, but protection scope of the present invention is the most therefore Any way limited.
The dedusting composition of the present invention, including following components: sulfonate surfactant;Carboxylate surfactants Agent;Sulfuric ester salt form surfactant;Non-ionic antistatic agent;And PAMA.
As preferably, the dedusting composition of the present invention is composed of the following components: sulfonate surfactant;Carboxylic acid type Surfactant;Sulfuric ester salt form surfactant;Non-ionic antistatic agent;And PAMA.
Dedusting composition according to the present invention, in terms of 100 weight portion dedusting compositions, it is preferable that can include following heavy The component of amount part: sulfonate surfactant 30~70 weight portion;Carboxylate surfactant 3~25 weight portion;Sulfuric acid Ester salt form surfactant 3~20 weight portion;Non-ionic antistatic agent 3~18 weight portion;PAMA 10~ 30 weight portions.In the dedusting composition of the present invention, sulfonate surfactant consumption is preferably 35~65 weight portions, more excellent Elect 40~60 weight portions as.In the dedusting composition of the present invention, carboxylate surfactant's consumption is preferably 5~23 weight Part, more preferably 6~20 weight portions.In the dedusting composition of the present invention, sulfuric ester salt form dosage of surfactant is preferably 3.1~18 weight portions, more preferably 3.3~15 weight portions.In the dedusting composition of the present invention, non-ionic antistatic agent is used Amount is preferably 5~16 weight portions, more preferably 8~15 weight portions.In the dedusting composition of the present invention, anion pp acyl Amine consumption is preferably 12~28 weight portions, more preferably 13~25 weight portions.
At dedusting composition of the present invention, it is preferable that described sulfonate surfactant is selected from following material In one or more: alkylsulfonate, alkylbenzenesulfonate, alkylnaphthalene sulfonate, alpha-alkene sulfonate, alpha-sulfo monocarboxylic acid Salt, the sulfoalkyl ester of aliphatic acid, sulphosuccinates, lignosulfonates, alkyl glyceryl ether sulfonate, alkyl diphenyl ether two Sulfonate." alkyl " in above-mentioned surfactant is known in the art those.Such as, " alkyl " in above-mentioned substance Carbon number can be C9~C25, preferably C12~C20, more preferably C13~C17.It is highly preferred that the sulfonate type table of the present invention One or more in following material of face activating agent: alkylsulfonate, alkylbenzenesulfonate, alkylnaphthalene sulfonate, amber Acid ester sulfonates.It is highly preferred that the sulfonate surfactant of the present invention is selected from alkylsulfonate and/or alkyl benzene sulphonate Salt.The example of alkylsulfonate include but not limited to dodecyl sodium sulfate, myristyl sodium sulfonate, sodium cetanesulfonate, Sodium stearyl sulfonate.The example of alkylbenzenesulfonate includes but not limited to neopelex, myristyl benzene sulfonic acid Sodium, cetyl benzenesulfonic acid sodium, octadecyl benzenesulfonic acid sodium.The sulfonate surfactant of the present invention is preferably dodecyl Benzene sulfonic acid sodium salt or sodium cetanesulfonate.
At dedusting composition of the present invention, it is preferable that described carboxylate surfactant includes amino acid pattern Surfactant or soap.The soap of the present invention includes fatty acid metal salts or fatty acid ammonium salt.The fat of aliphatic acid Fat chain is known in the art those.Such as, the carbon number of " aliphatic chain " in above-mentioned aliphatic acid can be C9~C25, excellent Elect C as12~C20, more preferably C13~C17.The soap example of the present invention includes but not limited to sodium laurate, tetradecanoic acid Sodium, hexadecanoic acid sodium, odium stearate.
Amino acid type surfactant of the present invention can be selected from one or more in following material: fatty acyl group NaAsp, fatty acyl group-N-beta-hydroxyethyl-Sodium Glycinate, N-fatty acyl group sodium sarcosinate, N-fatty acyl group polypeptide.On " fatty acyl group " of stating amino acid type surfactant is known in the art those, including saturated fat acyl group (such as alkane Acyl group), unsaturated fatty acyl group (such as enoyl-).Such as, the carbon of " fatty acyl group " of above-mentioned amino acid type surfactant Atomicity can be C10~C26, preferably C13~C21, more preferably C14~C19.Preferably, amino acid pattern of the present invention Surfactant can be selected from alkanoyl NaAsp, N-fatty acyl group polypeptide, more preferably N-fatty acyl group polypeptide.N-fat The example of fat sarcosinate includes Mei Dilan (Medialan);N-fatty acyl group polypeptide includes Lei meter Bang (Lamepon).N- The structural formula of fatty acyl group polypeptide is RCONHR ' (CONHR ')xCOOM, in formula, R represents C9~C25Fat-based, preferably C12~C20 Fat-based, more preferably C13~C17Fat-based;R ' is for determining the substituent of amino kind, such as H, methyl etc.;M be metal from Son, such as Na.The example of N-fatty acyl group polypeptide includes Lamepon A, is also called oleoyl amino acid sodium or oleoyl many contractings ammonia Base acid sodium.
According to dedusting composition of the present invention, it is preferable that described sulfuric ester salt form surfactant is selected from following One or more in material: saturated fatty alcohol sulfuric acid, unsaturated fatty alcohol sulfuric ester, secondary alkyl sulphate salt.Saturated Fatty alcohol contains saturated aliphatic chain (such as alkyl), and unsaturated fatty alcohol is the aliphatic chain (example containing unsaturated groups such as double bonds Such as thiazolinyl).The aliphatic chain of above-mentioned saturated fatty alcohol sulfuric acid, the aliphatic chain of unsaturated fatty alcohol sulfuric ester and secondary alkyl sulfide The secondary alkyl of acid esters salt is known in the art those, and such as, the carbon number of above-mentioned " aliphatic chain " and " secondary alkyl " is permissible For C9~C25, preferably C12~C20, more preferably C13~C17.The example of the saturated fatty alcohol sulfuric acid of the present invention include but It is not limited to laruyl alcohol sodium sulfovinate, tetradecanol sodium sulphate, sodium cetyl alcohol sulfate, stearyl alcohol sodium sulfovinate.The present invention is not The example of saturated fatty alcohol sulfuric acid include but not limited to lanolin alcohol sodium sulfovinate, tetradecene alcohol sodium sulphate, 16 Carbene alcohol sodium sulphate, oleyl sulfate sodium.The secondary alkyl sulphate salt of the present invention is alpha-olefin sulfating product, such as ladder ripple (Teepol).Preferably, sulfuric ester salt form surfactant of the present invention is selected from saturated fatty alcohol sulfuric acid, unsaturation Fatty alcohol sulfate;More preferably saturated fatty alcohol sulfuric acid.
The sulfonate surfactant of the present invention, carboxylate surfactant, sulfuric ester salt form surfactant etc. Anion surfactant acts synergistically, and the solids suspended by absorption make to build bridge between particle or made by charging neutrality Particle coacervation forms big flocculate, accelerates the sedimentation of particle in suspension, thus adsorbs PM10, PM2.5 in desulphurization plant Deng fine particulates.The polycyclic aromatic hydrocarbon that above-mentioned anion surfactant can also be carried secretly in adsorption particle thing simultaneously, two English Deng organic matter.
At dedusting composition of the present invention, it is preferable that described non-ionic antistatic agent is selected from the ring of aliphatic acid Oxidative ethane adduct, the ethylene oxide adduct of fatty alcohol, the ethylene oxide adduct of alkyl phenol, ethoxylated fatty amine, second Epoxide fatty acid amide, monoethanolamine-glycidol ether.Wherein, the aliphatic chain in aliphatic acid, fatty alcohol, fatty amine, fatty acid amide Carbon number can be C9~C25, preferably C12~C20, more preferably C13~C17;The carbon number of the alkyl chain of alkyl phenol Can be C9~C25, preferably C12~C20, more preferably C13~C17.Above-mentioned ethylene oxide adduct or the oxygen of ethoxylate The quantity of ethylene repeating unit can be 1~8, preferably 2~6, more preferably 3~5.Combine according to dedusting of the present invention Thing, it is preferable that described non-ionic antistatic agent is selected from ethylene oxide adduct (the fatty acid ester polyethylene glycol oxide of aliphatic acid Ether), the ethylene oxide adduct (poly alkyl alcohol ethylene oxide ether) of fatty alcohol, the ethylene oxide adduct (alkyl phenol of alkyl phenol Polyethylene glycol oxide ether), ethoxylated fatty amine (fatty amine polyethylene glycol oxide ether), ethoxylated fatty amides (fatty acid amide gather Ethylene oxide ether);More preferably ethoxylated fatty amine.The quantity of the oxygen ethylene repeating unit of above-mentioned ethoxylated fatty amine can Think 1~5, preferably 1~3.According to dedusting composition of the present invention, it is preferable that described ethoxylated fatty amine choosing From ethoxylated fat kiber alkyl amine, ethoxylated fat alkyl secondary amine, ethoxylation N-fatty alkyl-1,3-trimethylene diamines. The carbon number of above-mentioned fatty alkyl can be C9~C25, preferably C12~C20, more preferably C13~C17.Of the present invention The example of ethoxylated fatty amine includes but not limited to polyoxyethylene dodecyl amine, polyoxyethylene tetradecylamine, polyoxy second Alkene hexadecylamine, polyoxyethylene octadecyl amine, polyoxyethylene tallow base amine, polyethylene glycol hydrogenated tallow base amine, polyoxy second Alkene cocoalkyl amines, polyoxyethylene oil base amine, polyoxyethylene soya oil base amine, polyoxyethylene N-tallow base-1,3-trimethylene diamines. The polyethylene glycol hydrogenated tallow base amine of the present invention includes but not limited to polyoxyethylene (2) hydrogenated-tallow group amine, polyoxyethylene (5) hydrogen Change tallow base amine, polyoxyethylene (10) hydrogenated-tallow group amine, polyoxyethylene (15) hydrogenated-tallow group amine, polyoxyethylene (50) hydrogenation Tallow base amine.
Non-ionic antistatic agent is added, for neutralizing the finely ground particles in flue gas in the dedusting composition of the present invention Institute is electrically charged, beneficially the gathering further of particulate matter, increase, thus effectively removes these finely ground particles.
At dedusting composition of the present invention, it is preferable that described PAMA can be PAA With the copolymer of acrylamide, manufacturing enterprise includes Daqing oil field chemical assistant factory, chemical experimental factory of University Of Tianjin.Described the moon The example of cationic polyacrylamide such as APAA8701.The dedusting composition of the present invention adds PAMA and can improve Slurries toughness, improves dust removing effects.
At dedusting composition of the present invention, it is also possible to include other anionic surfactant, other anion Type surfactant includes but not limited to alkyl phosphate monoester salt, alkyl phosphoric acid dibasic acid esters salt etc..
Above-mentioned each component can be mixed by conventional method and obtain by the dedusting composition of the present invention, the most superfluous State.
The present invention also provides for a kind of desulfurization compositions, and described desulfurization compositions comprises desulfurization slurry and dedusting as above Composition.Wherein, this dedusting composition account for 0.01wt%~0.1wt% of desulfurization slurry, preferably 0.011wt%~ 0.03wt%, more preferably 0.012wt%~0.019wt%.Now, the dust removing effects of this dedusting composition is outstanding.The present invention Desulfurization slurry be preferably magnesium hydroxide slurry, it is also possible to be other kinds of desulfurization slurry, repeat no more here.
The present invention also provides for the purposes of above-mentioned dedusting composition, and it is for removing in the flue gas entering wet desulphurization equipment Particulate matter.The dedusting composition of the present invention remains fine solid particle after being particularly suited for bag-type dusting or electrostatic precipitation, and (particle diameter is less than 10 μm, particularly particle diameter are less than the fine particulates of 2.5 μm) further removing.The described dedusting composition of the present invention is preferred (i.e. dedusting liquid) uses in fluid form, uses step as follows:
Dedusting composition preparation process: mix three kinds of anionic surfactant, antistatic additive and anion pp Acid amides, prepares dedusting composition;
Dedusting composition storing step: this dedusting composition is stored in special dedusting composition storage tank or is stored in wet method In desulphurization circulating pond (groove);
Dedusting delivery of composition step: this dedusting composition is sent into special dedusting delivery of composition pump or water circulating pump In desulfurizing tower;
Dedusting composition and desulfurization slurry blend step: agitated with desulfurization slurry in dedusting composition is delivered to desulfurizing tower Mix;
Dust removal step: run wet desulphurization equipment, removing boiler of power plant, sintering machine or the cigarette of pelletizing equipment exiting flue gas Dirt.
In the present invention, the top in described desulphurization plant is provided with absorption spray district, sprays out the desulfurization containing dedusting composition Slurries, thus absorb the sulfur dioxide in flue gas and fine particulates.In order to reach good dust removing effects, it is preferable that enter The smoke content in flue gas in described desulphurization plant is 35~500mg/Nm3, preferably 50~400mg/Nm3, preferably 100 ~350mg/Nm3
In order to make smoke content within the above range, flue gas can first pass through cleaner before entering desulphurization plant, Such as sack cleaner or electrostatic precipitator, thus remove the overwhelming majority bigger particulate matter of particle diameter, such as more than PM10 Grain thing.
In the present invention, described flue gas is that coal-burning boiler, sintering machine and pelletizing equipment produce, and through cleaner such as Flue gas after sack cleaner or electrostatic precipitator dedusting.The described dedusting composition of the present invention can be by with delivery pump or circulation Water pump is sent in desulphurization plant, is uniformly mixed with desulfurization slurry.
At dedusting composition and the slurries blend step of the present invention, the temperature of desulfurization compositions is maintained at 35~65 DEG C, It is preferably 40~55 DEG C.
The concrete operations of the dedusting composition of the employing present invention are: first flue gas removes through sack cleaner or electrostatic precipitator Remove the particulate matter that particle diameter is bigger, be greater than the particulate matter of 10 μm;Flue gas after dust removal process enters desulphurization plant, uses desulfurization Slurries carry out desulfurization process, due in desulfurization slurry possibly together with dedusting composition component, it is thus possible to effectively remove particle diameter and be less than 10 μm, particularly particle diameter are less than the fine particulates of 2.5 μm.Flue gas after being processed by the method for the invention, it is possible to realize Flue dust qualified discharge.The exiting flue gas soot emissions content of the desulphurization plants such as coal-burning boiler, sintering machine and pelletizing equipment all can drop As little as 30mg/Nm3, reach dust emission standard.
Embodiment 1
The dedusting composite formula that the present embodiment uses is as shown in table 1.
Table 1 dedusting composite formula
Sequence number Title Consumption (kg)
1 Sodium n-alkylbenzenesulfonate (neopelex) 20
2 Lamepon A (Wuhan milky way Chemical Co., Ltd.) 5
3 Tetradecanol sodium sulphate 2
4 Polyoxyethylene dodecyl amine 5
5 PAMA 8
Dedusting composition is applied in 1,500,000 tons of pelletizing desulphurization denitration dust arresters by the present embodiment.This project operation is joined Number is as shown in table 2.
2 150 ten thousand tons of pelletizing desulphurization denitration dust arrester operational factor tables of table
Sequence number Parameter Unit Numerical value
1 Exhaust gas volumn (operating mode) m3/h 780000
2 Entrance sulfur dioxide concentration mg/Nm3 1600
3 Outlet sulfur dioxide concentration mg/Nm3 60
4 Inlet nitrogen oxides concentration mg/Nm3 650
5 Outlet nitrous oxides concentration mg/Nm3 65
6 Inlet dust mg/Nm3 115
7 Outlet dust mg/Nm3 12
8 Flue-gas temperature 110-160
9 Operating cost Yuan/ton pellet 4.4
Containing 250m3This dedusting composition 40kg, inlet flue gas before putting into is put in the desulfurizing tower of magnesium hydroxide slurries liquid measure Dust content is 115mg/Nm3, putting into this dedusting composition after 8 minutes, exiting flue gas dust content is down to 12mg/Nm3, and Stably keeping 10 hours, average dust removal efficiency is up to 89.6%, higher than design load, less than emission limit.This project desulphurization denitration The technical indicators such as efficiency of dust collection are as shown in table 3.
3 150 ten thousand tons of pelletizing desulphurization denitration dust arrester running technology indexs of table
Sequence number Project Unit Mean value Design load
1 Desulfuration efficiency % 98.2 97.3
2 Denitration efficiency % 75.6 60
3 Efficiency of dust collection % 89.6 80
4 Power consumption kW˙h 420 ≤620
5 Water consumption t/h 26 30
6 Desulphurization denitration intermixture t/h 0.95 1.2
7 SR Pa 600 ≤800
Conclusion: dedusting composition and desulfurization slurry weight ratio are 0.016wt%, under this addition, this dedusting composition Dust removing effects is notable, stable, and exhaust gas dust content is less than discharge standard.
Embodiment 2
The dedusting composite formula that the present embodiment uses is as shown in table 4.
Table 4 dedusting composite formula
Sequence number Title Consumption (kg)
1 Neopelex 90
2 Lamepon A (Wuhan milky way Chemical Co., Ltd.) 20
3 Tetradecanol sodium sulphate 8
4 Polyoxyethylene octadecyl amine 12
5 PAMA 20
This dedusting composition is applied in 3 × 380t/h boiler desulfurization denitration dust collecting project, its project operation parameter such as table 5 Shown in.
Table 53 × 380t/h boiler desulfurization denitration dust collecting operational factor table
Sequence number Parameter Unit Numerical value
1 Exhaust gas volumn (operating mode) m3/h 1780000
2 Entrance sulfur dioxide concentration mg/Nm3 2600
3 Outlet sulfur dioxide concentration mg/Nm3 60
4 Inlet nitrogen oxides concentration mg/Nm3 450
5 Outlet nitrous oxides concentration mg/Nm3 70
6 Inlet dust mg/Nm3 175
7 Outlet dust mg/Nm3 12.6
8 Flue-gas temperature 110-160
9 Operating cost Yuan/ton pellet 4.2
It is 800m in magnesium hydroxide slurries liquid measure3Absorption tower in add this dedusting composition 150kg, put into before inlet flue gas Dust content is 175mg/Nm3, putting into this dedusting composition after 12 minutes, exiting flue gas dust content is down to 12.6mg/Nm3, and And stably keep 12 hours, efficiency of dust collection is up to 92.8%, and higher than design load, exhaust gas dust content is less than discharge standard.This The technical indicators such as mesh desulphurization denitration efficiency of dust collection are as shown in table 6.
Table 63 × 380t/h boiler desulfurization denitration dust collecting plant running technical indicator
Sequence number Project Unit Mean value Design load
1 Desulfuration efficiency % 98.9 97.3
2 Denitration efficiency % 80.2 70
3 Efficiency of dust collection % 92.8 90
4 Power consumption kW˙h 3280 ≤3500
5 Water consumption t/h 68 85
6 Desulphurization denitration intermixture t/h 5.87 6.9
7 SR Pa 850 ≤1000
Conclusion: dedusting composition and desulfurization slurry weight ratio are 0.019wt%, under this dedusting composition addition, should Dedusting composition dust removing effects is stable, and exhaust gas dust content is less than discharge standard.
Embodiment 3
The dedusting composite formula that the present embodiment uses is as shown in table 7.
Table 7 dedusting composite formula
Sequence number Title Consumption (kg)
1 Neopelex 55
2 Lamepon A 6
3 Tetradecanol sodium sulphate 15
4 Polyoxyethylene octadecyl amine 10
5 PAMA 14
This dedusting composition is applied to 265m2In sintering machine desulfuration project, this project operation parameter is as shown in table 8.
Table 8 265m2Sintering machine desulfuration operational factor table
Sequence number Parameter Unit Numerical value
1 Exhaust gas volumn (operating mode) m3/h 1620000
2 Entrance sulfur dioxide concentration mg/Nm3 2500
3 Outlet sulfur dioxide concentration mg/Nm3 45
4 Inlet dust mg/Nm3 105
5 Outlet dust mg/Nm3 11.4
6 Flue-gas temperature 120-160
7 Sintering deposit annual production Ten thousand tons 265
8 Ton sintering deposit running cost (agreement) Yuan/ton 4.5
9 System footprint area m3 1000
In the present embodiment, before putting into, inlet flue gas dust content is 105mg/Nm3, magnesium hydroxide slurries liquid measure in absorption tower For 600m3, adding this dedusting composition 100kg, put into this dedusting composition after 15 minutes, exiting flue gas dust content is down to 11.4mg/Nm3, and stably keep 17 hours, average dust removal efficiency is up to 93.6%, higher than design load, exhaust gas dust content Less than emission limit.The technical indicators such as this project desulphurization denitration efficiency of dust collection are as shown in table 9.
Table 9 265m2Sintering machine desulfuration plant running technical indicator
Sequence number Project Unit Mean value Design load
1 Desulfuration efficiency % 98.2 97.5
2 Magnesia utilization rate % 99.2 98
3 Efficiency of dust collection % 93.6 85
4 Power consumption kW˙h 529 ≤667
5 Water consumption t/h 42 55
6 Magnesia consumption t/h 1.98 2
7 SR Pa 600 ≤800
Conclusion: dedusting composition and desulfurization slurry weight ratio are 0.017wt%, and under this ratio, this dedusting composition removes Dirt effect stability, exhaust gas dust content is less than discharge standard.
Embodiment 4
The dedusting composite formula that the present embodiment uses is as shown in table 10.
Table 10 dedusting composite formula
Sequence number Title Consumption (kg)
1 Neopelex 12
2 Lamepon A 6
3 Tetradecanol sodium sulphate 1
4 Polyoxyethylene (5) hydrogenated-tallow group amine 4
5 PAMA 7
This dedusting composition is applied to 132m2In sintering machine desulfuration project, this project operation parameter is as shown in table 11.
Table 11 132m2Sintering machine desulfuration island suction parameter table
Sequence number Parameter Unit Numerical value
1 Exhaust gas volumn (operating mode) m3/h 810000
2 Entrance sulfur dioxide concentration mg/Nm3 1600
3 Outlet sulfur dioxide concentration mg/Nm3 25
5 Inlet dust mg/Nm3 180
6 Outlet dust mg/Nm3 9.5
7 Flue-gas temperature 150
8 Sintering deposit annual production Ten thousand tons 90
9 Ton sintering deposit running cost (agreement) Yuan/ton 4.23
10 System footprint area m3 600
In the present embodiment, before adding this dedusting composition, inlet flue gas dust content is 180mg/Nm3, 30kg should be removed It is 250m that dirt composition adds magnesium hydroxide slurries liquid measure to3Absorption tower in, after 5 minutes, exiting flue gas dust content is down to 10mg/Nm3, and stably keep 20 hours, average dust removal efficiency is up to 94.7%, higher than design load 88%, and meets discharge Limit value.The technical indicators such as this project desulfurization dust-removing efficiency are as shown in table 12.
Table 12 132m2Sintering machine desulfuration island technical indicator
Sequence number Project Unit Mean value Design load
1 Desulfuration efficiency % 98.8 98.5
2 Magnesia profit % 99.9 98
3 Efficiency of dust collection % 94.7 88
4 Power consumption kW˙h 529 ≤667
5 Water consumption t/h 42 55
6 Magnesia consumes t/h 0.64 2
7 SR Pa 600 ≤700
Conclusion: dedusting composition and desulfurization slurry weight ratio are 0.012wt%, and under this ratio, this dedusting composition removes Dirt effect stability, exhaust gas dust content is less than discharge standard.
According to four embodiments in the present invention, this dedusting composition removal effect to fine solid particle remaining after dedusting Significantly, for exhaust gas dust content 30~500mg/Nm3Coal-burning boiler, sintering machine/pelletizing flue gas has good dedusting Effect, the exhaust gas dust content after process is below state emission standard.
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the flesh and blood of the present invention, and this area skill Art personnel it is contemplated that any deformation, improve, replace and each fall within the scope of the present invention.

Claims (9)

1. a dedusting composition, it is characterised in that in terms of 100 weight portion dedusting compositions, including the component of following weight portion:
Sulfonate surfactant 30~70 weight portion;
Carboxylate surfactant 3~25 weight portion;
Sulfuric ester salt form surfactant 3~20 weight portion;
Non-ionic antistatic agent 3~18 weight portion;
PAMA 10~30 weight portion.
Dedusting composition the most according to claim 1, it is characterised in that described sulfonate surfactant selected from One or more in lower material: alkylsulfonate, alkylbenzenesulfonate, alkylnaphthalene sulfonate, alpha-alkene sulfonate, alpha-sulfo Monocarboxylate, the sulfoalkyl ester of aliphatic acid, sulphosuccinates, lignosulfonates, alkyl glyceryl ether sulfonate, alkyl two Phenylate disulfonate.
Dedusting composition the most according to claim 1, it is characterised in that described carboxylate surfactant includes ammonia Base acid type surfactant or soap.
Dedusting composition the most according to claim 3, it is characterised in that described amino acid type surfactant selected from One or more in lower material: fatty acyl group NaAsp, fatty acyl group-N-beta-hydroxyethyl-Sodium Glycinate, N-fatty acyl Base sodium sarcosinate, N-fatty acyl group polypeptide.
Dedusting composition the most according to claim 1, it is characterised in that described sulfuric ester salt form surfactant is selected from One or more in following material: saturated fatty alcohol sulfuric acid, unsaturated fatty alcohol sulfuric ester, secondary alkyl sulphate salt.
Dedusting composition the most according to claim 1, it is characterised in that described non-ionic antistatic agent is selected from fat The ethylene oxide adduct of acid, the ethylene oxide adduct of fatty alcohol, the ethylene oxide adduct of alkyl phenol, ethoxylated fat Amine, ethoxylated fatty amides, monoethanolamine-glycidol ether.
Dedusting composition the most according to claim 6, it is characterised in that described ethoxylated fatty amine is selected from ethyoxyl Change fatty alkyl primary amine, ethoxylated fat alkyl secondary amine, ethoxylation N-fatty alkyl-1,3-trimethylene diamines.
8. a desulfurization compositions, it is characterised in that described desulfurization compositions comprises following components:
Desulfurization slurry;With
Dedusting composition as described in any one of claim 1~7;
Wherein, this dedusting composition accounts for 0.01wt%~0.1wt% of desulfurization slurry.
9., according to the purposes of the dedusting composition described in any one of claim 1~7, it is used for removing entrance wet desulphurization equipment Flue gas in particulate matter.
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