CN113731160A - Preparation method of calcium-based synchronous desulfurization and denitrification agent - Google Patents
Preparation method of calcium-based synchronous desulfurization and denitrification agent Download PDFInfo
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- desulfurization
- calcium
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 74
- 230000023556 desulfurization Effects 0.000 title claims abstract description 74
- 239000011575 calcium Substances 0.000 title claims abstract description 61
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 57
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 46
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 229910052791 calcium Inorganic materials 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 21
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 18
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 15
- 239000005909 Kieselgur Substances 0.000 claims abstract description 13
- 239000001110 calcium chloride Substances 0.000 claims abstract description 13
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000012216 screening Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000002910 solid waste Substances 0.000 claims abstract description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 22
- 238000004898 kneading Methods 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- 239000007832 Na2SO4 Substances 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000011236 particulate material Substances 0.000 claims 2
- 239000003546 flue gas Substances 0.000 abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 17
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 10
- 239000008187 granular material Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- RJIWZDNTCBHXAL-UHFFFAOYSA-N nitroxoline Chemical compound C1=CN=C2C(O)=CC=C([N+]([O-])=O)C2=C1 RJIWZDNTCBHXAL-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- DEXZEPDUSNRVTN-UHFFFAOYSA-K yttrium(3+);trihydroxide Chemical compound [OH-].[OH-].[OH-].[Y+3] DEXZEPDUSNRVTN-UHFFFAOYSA-K 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/306—Alkali metal compounds of potassium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2251/606—Carbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention relates to the technical field of solid waste treatment resource utilization and flue gas desulfurization and denitration, and discloses a method for preparing a calcium-based synchronous desulfurization and denitration agent, which comprises the following steps: s1 weighing Ca (OH) with a certain mass2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2Aluminum sol raw material; s2, adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks; and S3, drying the wet blank in a dryer, cooling, crushing, screening and grinding into calcium-based synchronous desulfurization and denitrification agent ultrafine powder. The calcium-based synchronous desulfurization and denitrification agent provided by the invention effectively utilizes solid wastes, and has the advantages of low cost and wide source of raw materials and simple preparation method. The calcium-based synchronous desulfurization and denitrification agent obtained by the invention can be used for semi-dry desulfurization or dry desulfurization, the desulfurization and denitrification efficiency is respectively up to more than 98% and 80%, and the calcium-based synchronous desulfurization and denitrification agent is suitable for wide temperature window of flue gas and SO2And NOxMeet the requirement of ultra-lowAnd (5) discharging.
Description
Technical Field
The invention relates to the technical field of solid waste treatment and resource utilization and flue gas desulfurization and denitration, and discloses a preparation method of a calcium-based synchronous desulfurization and denitration agent.
Background
28 th 4 th month in 2019, the five committees of the state jointly issue the opinion on promoting the ultralow emission of the steel industry, and require the flue gas SO2、NOXThe hourly mean value of the emission mass concentration of the particulate matters respectively reaches 35mg/Nm3、50mg/Nm3、10mg/Nm3The following.
At present, the flue gas desulfurization and denitration of the coal-fired boiler of the power plant generally adopts an SCR and wet desulfurization integrated process technology. However, the property of the flue gas discharged by non-electric industries such as metallurgy, steel, coking, sintering, chemical industry and the like is greatly different from the property of the flue gas discharged by power plants, the SCR + wet desulphurization process is not suitable for the flue gas treatment of the non-electric industries, and the process has some defects. The defects of wet desulphurization are as follows: a) the power consumption of equipment such as a circulating pump, an oxidation fan and the like is high; b) the desulfurized flue gas carries more water to form white smoke, and the system water supplement amount and the wastewater discharge amount are large; c) the process flow is complex, and the operation requirement on operators is high; the SCR denitration has the defects that: a) the SCR denitration reactor is arranged behind the economizer, the catalyst adopts a medium-temperature denitration catalyst at 300-400 ℃, and dust and SO in flue gas2High mass concentration, severe erosion and abrasion of catalyst by dust, SO2Can be converted into SO under the action of catalyst3，SO3Easy to react with denitration reducing agent NH3Reaction to form NH4HSO4，NH4HSO4The smoke-free flame-retardant rubber is liquid at 150-230 ℃, is dispersed in smoke, has viscosity, and is easy to block and corrode equipment such as a rear-end air preheater; b) if the SCR denitration reactor is arranged after wet desulphurization, dust and SO2The mass concentration is low, but the flue gas temperature after desulfurization is low and is only 50-55 ℃, and the flue gas temperature after desulfurization needs to be raised to 300-400 ℃ by a matched hot blast stove, so that the requirement of medium-temperature SCR denitration on temperature can be met, and the energy consumption of the system is very high.
Chinese patent document No. 201310055375.3 discloses a semisteel desulfurizing agent and a desulfurization method using the same, which is characterized by using CaF2Mg and CaO are used as raw materials, a KR method is adopted for desulfurization, but the utilization rate of a desulfurizer is low, the desulfurization efficiency is low, and the denitration function is not realized.
Chinese patent document No. 201510561950.6 discloses a denitration agent for denitration from flue gas, and a preparation method and application thereof, which is characterized in that titanium dioxide, attapulgite clay or montmorillonite particles are used as inert carriers, calcium hydroxide and yttrium hydroxide react with a sulfur source to generate denitration agent particles, but the denitration agent particles have the disadvantages of high raw material cost, complex manufacturing process, low denitration efficiency and no desulfurization function.
The Chinese patent document No. 201910187392.X discloses a selective denitration agent and a denitration treatment process and system thereof, and the selective denitration agent is characterized in that an amido denitration active component, peroxide and an auxiliary agent are prepared into solution or powder, the solution or powder is conveyed to a high-temperature area of a boiler and dispersed into flue gas of the boiler to react with nitric oxide in the flue gas to realize denitration, but the denitration efficiency is greatly influenced by temperature, the processing raw material cost of the denitration agent is high, the denitration efficiency is low, and the denitration agent does not have a desulfurization function.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for preparing a calcium-based synchronous desulfurization and denitrification agent, which adopts Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2The aluminum sol is used as a raw material, water is added into a kneading machine to be mixed to form uniformly dispersed wet blanks, the wet blanks are dried in a dryer, and the wet blanks are crushed, screened and ground into calcium-based synchronous desulfurization and denitrification agent ultrafine powder after being cooled, so that the desulfurization and denitrification efficiency is higher.
In order to achieve the purpose, the invention adopts the following technical scheme:
the preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2Aluminum sol raw material;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into a calcium-based synchronous desulfurization and denitrification agent superfine powder finished product;
preferably, the Ca (OH) in the step S12Is powder with the granularity of about 300 meshes and the purity of about 90 percent;
preferably, in the step S1, the SDS desulfurization waste residue mainly contains NaHCO3、Na2CO3、Na2SO4、Na2SO3Industrial solid waste;
preferably, the Ca (OH) in the step S12SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2And the mass ratio of the aluminum sol to the aluminum sol is 40: 30: (0-15): 10: 5: 4: 1;
preferably, in the step S1, the mass ratio of the KMnO4 is increased, the denitration efficiency is increased, or the amount of the denitration agent is reduced;
preferably, the wet blank is dried in a dryer at a temperature of about 100 ℃ for 3 hours in the step S3;
preferably, the dried blank in step S3 is crushed by a crusher, and after sieving, the particle material with a particle size below 2mm is sent to a grinder for grinding to obtain calcium-based synchronous desulfurization and denitrification agent ultrafine powder with a particle size of about 25 μm, and the large particle material on the sieve is returned to the crusher for continuous crushing.
The calcium-based synchronous desulfurization and denitrification agent obtained by the preparation method of the calcium-based synchronous desulfurization and denitrification agent has desulfurization and denitrification efficiencies respectively higher than 98% and 80%, and is suitable for wide temperature window of flue gas and SO2And NOxMeeting the requirement of ultra-low emission.
The invention has the beneficial effects that:
1. the preparation method of the calcium-based synchronous desulfurization and denitrification agent adopts Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2Alumina sol as raw material KMnO4Oxidizing NO in the flue gas to NO2、NO3、N2O5Equal valence state NOxIn flue gasSO2And NO2With Ca (OH) in the desulfurization and denitrification agent2Na in SDS desulfurization waste residue2CO3The alkaline substances are subjected to chemical reaction to achieve the aim of synchronous desulfurization and denitrification;
2. the preparation method of the calcium-based synchronous desulfurization and denitrification agent adopts Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2The aluminum sol is taken as a raw material, and the SDS desulfurization waste residue contains NaHCO3NaHCO in the course of drying at 100 deg.C3Decomposition reaction to form CO2Gas escapes from the desulfurization and denitrification agent particles, so that the number of pores and the specific surface area of the particles are increased, the desulfurization and denitrification reaction is promoted, and the comprehensive utilization of waste is realized;
3. the calcium-based synchronous desulfurization and denitrification agent is ultrafine powder with the particle size of about 25 mu m, has large specific surface area, desulfurization efficiency of more than 98 percent and denitrification efficiency of more than 80 percent, has wider temperature window (100-240 ℃) for desulfurization and denitrification reaction, and greatly reduces investment and operation cost;
4. the invention relates to a preparation method of a calcium-based particle synchronous desulfurization and denitrification agent, which adopts Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2The aluminum sol is used as a raw material, and the PEO and the aluminum sol are used as forming aids, so that the mechanical strength and the binding power of the calcium-based synchronous desulfurization and denitrification agent are obviously enhanced.
Drawings
The embodiments of the present invention will be described in detail, for the purpose of reading and understanding by those skilled in the art, with reference to the following drawings, but the present invention is only a part of the best embodiments and the protection and scope of the present invention is not limited thereto:
FIG. 1 is a process flow chart of the method for preparing the calcium-based synchronous desulfurization and denitrification agent.
Detailed Description
As shown in fig. 1, the method for preparing the calcium-based synchronous desulfurization and denitrification agent provided by the invention is characterized in that:
the preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2Aluminum sol raw material;
Ca(OH)2is powder with granularity of about 300 meshes and purity of about 90 percent, and the main component of the SDS desulfurization waste residue is NaHCO3、Na2CO3、Na2SO4、Na2SO3Industrial solid waste;
Ca(OH)2is powder with granularity of about 300 meshes and purity of about 90 percent, and the main component of the SDS desulfurization waste residue is NaHCO3、Na2CO3、Na2SO4、Na2SO3Industrial solid waste;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into a calcium-based synchronous desulfurization and denitrification agent superfine powder finished product;
and (2) continuously drying for 3 hours at the temperature of about 100 ℃ to obtain dry materials, crushing the dry materials by using a crusher, sieving, conveying granular materials with the particle size below 2mm below a sieve to a grinder for grinding to obtain calcium-based synchronous desulfurization and denitrification agent ultrafine powder with the particle size of about 25 mu m, and returning large granular materials on the sieve to the crusher for continuous crushing.
The calcium-based synchronous desulfurization and denitrification agent prepared by the method has good performance, the desulfurization and denitrification efficiency reaches more than 98% and 80% respectively, the applicable flue gas temperature range is wide, and SO is2And NOxMeeting the requirement of ultra-low emission.
The preparation method of the calcium-based particle synchronous desulfurization and denitrification agent of the invention is further described below by combining specific examples.
Example 1
The preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2And the aluminum sol raw material is 40: 30: 5: 10: 5: 4: 1;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into a calcium-based synchronous desulfurization and denitrification agent superfine powder finished product;
and (2) continuously drying for 3 hours at the temperature of about 100 ℃ to obtain dry materials, crushing the dry materials by using a crusher, sieving, conveying granular materials with the particle size below 2mm below a sieve to a grinder for grinding to obtain calcium-based synchronous desulfurization and denitrification agent ultrafine powder with the particle size of about 25 mu m, and returning large granular materials on the sieve to the crusher for continuous crushing.
Example 2
The preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2And the aluminum sol raw material is 40: 30: 10: 10: 5: 4: 1;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into a calcium-based synchronous desulfurization and denitrification agent superfine powder finished product;
and (2) continuously drying for 3 hours at about 120 ℃ to obtain dry materials, crushing the dry materials by using a crusher, sieving, conveying granular materials with the particle size below 2mm below a sieve to a grinder for grinding to obtain calcium-based synchronous desulfurization and denitrification agent ultrafine powder with the particle size of about 25 mu m, and returning large granular materials on the sieve to the crusher for continuous crushing.
Example 3
The preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2And the aluminum sol raw material is 40: 30: 15: 10: 5: 4: 1;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into a calcium-based synchronous desulfurization and denitrification agent superfine powder finished product;
and (2) continuously drying for 3 hours at the temperature of about 150 ℃ to obtain dry materials, crushing the dry materials by using a crusher, sieving, conveying granular materials with the particle size below 2mm below a sieve to a grinder for grinding to obtain calcium-based synchronous desulfurization and denitrification agent superfine powder with the particle size of about 25 mu m, and returning large granular materials on the sieve to the crusher for continuous crushing.
Claims (7)
1. The preparation method of the calcium-based synchronous desulfurization and denitrification agent is characterized by comprising the following steps:
s1, raw material weighing line: weighing a certain mass of Ca (OH)2SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2Aluminum sol raw material;
s2, kneading line: mixing and kneading: adding water into the raw materials in a kneader and mixing to form uniformly dispersed wet blanks;
s3, drying, crushing, screening and grinding control line: and conveying the wet blank body into a dryer through a belt conveyor for drying to obtain a dry blank body, cooling, crushing, screening and grinding into calcium-based synchronous desulfurization and denitrification agent ultrafine powder.
2. The method for producing a calcium-based synchronous desulfurization and denitrification agent according to claim 1, wherein the Ca (OH) in S12Is powder with the granularity of about 300 meshes and the purity of about 90 percent.
3. The method for preparing the calcium-based synchronous desulfurization and denitrification agent according to claim 1, wherein the SDS desulfurization waste residue in S1 mainly comprises NaHCO3、Na2CO3、Na2SO4、Na2SO3Is industrial solid waste.
4. The method for preparing a calcium-based synchronous desulfurization and denitrification agent according to claim 1, wherein the Ca (OH) content in S12SDS desulfurized waste residue, KMnO4Diatomaceous earth, PEO (polyethylene oxide), CaCl2And the mass ratio of the aluminum sol to the aluminum sol is 40: 30: (0-15): 10: 5: 4: 1.
5. the method for preparing calcium-based synchronous desulfurization and denitrification agent as claimed in claim 1, wherein the KMnO is increased by the method of S14The denitration efficiency is improved or the dosage of the denitration agent is reduced.
6. The method for preparing a calcium-based synchronous desulfurization and denitrification agent as claimed in claim 1, wherein the wet billet is continuously dried in a drier at a temperature of about 100 ℃ for 3 hours in S3.
7. The method for preparing a calcium-based synchronous desulfurization and denitrification agent as claimed in claim 1, wherein the dried blank in S3 is crushed by a crusher, sieved, and the particulate material with a particle size below 2mm is ground by a grinder to obtain ultrafine calcium-based synchronous desulfurization and denitrification agent powder with a particle size of about 25 μm, and the large particulate material on the sieve is returned to the crusher for continuous crushing.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120235086A1 (en) * | 2009-10-02 | 2012-09-20 | Torsten Schlicht | Mineral, granulated desulfurizing agent on the basis of calcium hydroxide, method for the production thereof and use thereof |
| CN105727730A (en) * | 2016-03-22 | 2016-07-06 | 天津滨环化学工程技术研究院有限公司 | Efficient flue gas desulfurization and denitrification method and materials adopted by same |
| CN108176204A (en) * | 2017-12-26 | 2018-06-19 | 四川大学 | Flue gas and desulfurizing and denitrifying integrated purification system and purification method |
| CN110385025A (en) * | 2019-08-27 | 2019-10-29 | 邓金营 | A kind of calcium base flue gas desulfurization and denitrification agent and preparation method thereof |
| CN110683777A (en) * | 2019-11-14 | 2020-01-14 | 天津水泥工业设计研究院有限公司 | Powder desulfurizing agent for cement kiln and preparation method and application thereof |
| CN111068475A (en) * | 2020-03-01 | 2020-04-28 | 河北唐银钢铁有限公司 | Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device |
-
2021
- 2021-09-13 CN CN202111071156.5A patent/CN113731160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120235086A1 (en) * | 2009-10-02 | 2012-09-20 | Torsten Schlicht | Mineral, granulated desulfurizing agent on the basis of calcium hydroxide, method for the production thereof and use thereof |
| CN105727730A (en) * | 2016-03-22 | 2016-07-06 | 天津滨环化学工程技术研究院有限公司 | Efficient flue gas desulfurization and denitrification method and materials adopted by same |
| CN108176204A (en) * | 2017-12-26 | 2018-06-19 | 四川大学 | Flue gas and desulfurizing and denitrifying integrated purification system and purification method |
| CN110385025A (en) * | 2019-08-27 | 2019-10-29 | 邓金营 | A kind of calcium base flue gas desulfurization and denitrification agent and preparation method thereof |
| CN110683777A (en) * | 2019-11-14 | 2020-01-14 | 天津水泥工业设计研究院有限公司 | Powder desulfurizing agent for cement kiln and preparation method and application thereof |
| CN111068475A (en) * | 2020-03-01 | 2020-04-28 | 河北唐银钢铁有限公司 | Gas boiler SDS sodium-based dry-method desulfurized ash circulating and returning device |
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Application publication date: 20211203 |