CN117258758A - Acid mist adsorbent and preparation method thereof - Google Patents
Acid mist adsorbent and preparation method thereof Download PDFInfo
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- CN117258758A CN117258758A CN202311303072.9A CN202311303072A CN117258758A CN 117258758 A CN117258758 A CN 117258758A CN 202311303072 A CN202311303072 A CN 202311303072A CN 117258758 A CN117258758 A CN 117258758A
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- 239000002253 acid Substances 0.000 title claims abstract description 138
- 239000003463 adsorbent Substances 0.000 title claims abstract description 133
- 239000003595 mist Substances 0.000 title claims abstract description 125
- 238000002360 preparation method Methods 0.000 title abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 64
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002893 slag Substances 0.000 claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims abstract description 30
- 239000000440 bentonite Substances 0.000 claims abstract description 30
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 30
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000013543 active substance Substances 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims description 49
- 239000002994 raw material Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000002245 particle Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000010304 firing Methods 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 5
- 239000000395 magnesium oxide Substances 0.000 claims description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 5
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 5
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 5
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 4
- 244000060011 Cocos nucifera Species 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 4
- 229910001570 bauxite Inorganic materials 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 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 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052900 illite Inorganic materials 0.000 claims description 4
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 4
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002594 sorbent Substances 0.000 claims 2
- 239000000843 powder Substances 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003546 flue gas Substances 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 27
- 238000001179 sorption measurement Methods 0.000 description 18
- 239000007789 gas Substances 0.000 description 13
- 230000008092 positive effect Effects 0.000 description 12
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 10
- 239000000920 calcium hydroxide Substances 0.000 description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 10
- 238000006298 dechlorination reaction Methods 0.000 description 9
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- JQMFQLVAJGZSQS-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-N-(2-oxo-3H-1,3-benzoxazol-6-yl)acetamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC(=O)NC1=CC2=C(NC(O2)=O)C=C1 JQMFQLVAJGZSQS-UHFFFAOYSA-N 0.000 description 1
- 229910015189 FeOx Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 239000000654 additive Substances 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
- 238000013459 approach Methods 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4893—Residues derived from used synthetic products, e.g. rubber from used tyres
Abstract
The application relates to the technical field of flue gas purification, in particular to an acid mist adsorbent and a preparation method thereof. The acid mist adsorbent comprises the following components: steel slag micropowder, diatomite, active carbon, bentonite, pseudo-boehmite and an active agent; the slag micro powder comprises, by weight, 80-90 parts of slag micro powder, 5-10 parts of diatomite, 2-5 parts of active carbon, 1-4 parts of bentonite, 1-3 parts of pseudo-boehmite and 1-3 parts of active agent. The application content solves the technical problem that the cost of the existing acid mist adsorbent is high.
Description
Technical Field
The application relates to the technical field of flue gas purification, in particular to an acid mist adsorbent and a preparation method thereof.
Background
With the rapid development of modern industrialization, a large amount of waste slag is generated. These waste residues often contain organics, heavy metal ions and other pollutants, severely affecting the environment. In modern industrial production, a large amount of acid waste gas is generated in many processes, such as metallurgy, chemical industry, electric power industry and the like, and toxic and harmful gases contained in the waste gas pose a great threat to the environment and human health. Thus, the treatment of these acid exhaust gases with a suitable adsorbent has become a necessary approach.
At present, most of acid mist adsorbents in the market are prepared by taking active carbon, zeolite, ferric oxide and the like as raw materials, but the raw materials have high cost and complex preparation process.
Disclosure of Invention
The application provides an acid mist adsorbent and a preparation method thereof, which are used for solving the technical problem of higher cost of the existing acid mist adsorbent.
In a first aspect, the present application provides an acid mist adsorbent comprising:
steel slag micropowder, diatomite, active carbon, bentonite, pseudo-boehmite and an active agent; wherein, the weight portions of the components are calculated,
80-90 parts of steel slag micropowder, 5-10 parts of diatomite, 2-5 parts of activated carbon, 1-4 parts of bentonite, 1-3 parts of pseudo-boehmite and 1-3 parts of active agent.
Optionally, the diatomaceous earth includes at least one of: natural diatomite and artificial synthetic diatomite.
Optionally, the bentonite comprises at least one of the following: bauxite, montmorillonite, illite, talcum powder and attapulgite-like bentonite; and/or, the number of the groups,
the activated carbon comprises at least one of the following: wood activated carbon, coal activated carbon, and coconut activated carbon.
Optionally, the active agent includes at least one of: industrial grade active ferric oxide, industrial grade active zinc oxide and industrial grade active magnesium oxide; and/or, the number of the groups,
the pseudo-boehmite is industrial pseudo-boehmite.
In a second aspect, the present application provides a method for preparing an acid mist adsorbent, for preparing the acid mist adsorbent according to any one of the embodiments of the first aspect, the method comprising:
firstly mixing steel slag micropowder with a set particle size with diatomite, active carbon, bentonite, pseudo-boehmite and an active agent to obtain a raw material;
adding water into the raw materials for secondary mixing, and controlling the proportion of the water to the raw materials to obtain a mixed material;
extruding the mixed material, and then drying and roasting to obtain an acid mist adsorbent; wherein the process parameters of the drying and the temperature of the firing are controlled.
Optionally, the set particle size is less than 5 μm.
Optionally, the ratio of the water to the raw materials is 0.5-1:1.
optionally, the drying process parameters include: drying temperature and drying time; wherein the drying temperature is 60-80 ℃, and the drying time is 2-4h.
Optionally, the baking temperature is 500-800 ℃.
Optionally, extruding the mixed material, drying and roasting to obtain the acid mist adsorbent, and then further comprising:
crushing the acid mist adsorbent, and screening to obtain a granular acid mist adsorbent; wherein,
the crushing granularity of the acid mist adsorbent is 1-3mm, and the screening granularity of the acid mist adsorbent is 0.1-5mm.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the acid mist adsorbent provided by the embodiment of the application takes steel slag as a main raw material, and is added with additives such as diatomite, bentonite and the like, so that the raw material cost is low, and the acid mist adsorbent has the advantages of low cost, high adsorption efficiency and the like. And treat SO in the flue gas 2 、HCl、NO 2 Acid gas is treated, a certain amount of steel slag solid waste is also consumed, the pollution control by waste is realized, the requirements of environment protection, desulfurization and dechlorination are realized, the solid waste discharge is reduced, and the fund is saved for enterprises. In industrial production, the method can be widely applied to the fields of waste gas treatment and environmental protection, and has good application value and popularization prospect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic flow chart of a preparation method of an acid mist adsorbent according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.
Various embodiments of the present application may exist in a range format; it should be understood that the description in a range format is merely for convenience and brevity and should not be interpreted as a rigid limitation on the scope of the application. It is therefore to be understood that the range description has specifically disclosed all possible sub-ranges and individual values within that range. For example, it should be considered that a description of a range from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5, and 6, wherever applicable. In addition, whenever a numerical range is referred to herein, it is meant to include any reference number (fractional or integer) within the indicated range.
In this application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used specifically to refer to the orientation of the drawing in the figures. In addition, in the description of the present application, the terms "include", "comprise", "comprising" and the like mean "including but not limited to". Relational terms such as "first" and "second", and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Herein, "and/or" describing an association relationship of an association object means that there may be three relationships, for example, a and/or B, may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. Herein, "at least one" means one or more, and "a plurality" means two or more. "at least one", "at least one" or the like refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.
Unless specifically indicated otherwise, the various raw materials, reagents, instruments, equipment, and the like used in this application are commercially available or may be prepared by existing methods.
In a first aspect, the present application provides an acid mist adsorbent comprising:
steel slag micropowder, diatomite, active carbon, bentonite, pseudo-boehmite and an active agent; wherein, the weight portions of the components are calculated,
80-90 parts of steel slag micropowder, 5-10 parts of diatomite, 2-5 parts of activated carbon, 1-4 parts of bentonite, 1-3 parts of pseudo-boehmite and 1-3 parts of active agent.
The positive effect of controlling the content of the steel slag micro powder to be 80-90 parts is that: can fully and fully absorb SO 2 HCl and NO 2 And acid gases are treated, and the desulfurization and dechlorination effects can be fully ensured by matching with an active agent. If the content of the steel slag micro powder is too high, the specific surface area and the mechanical strength of the acid mist adsorbent can be reduced to a certain extent, and the acid mist adsorbent is easier to break while the deacidification effect is influenced; if the content of the steel slag micro powder is too low, the deacidification effect can be affected to a certain extent due to the reduction of the effective components, and the operation cost is increased. Specifically, the content of the steel slag micropowder may be 80 parts, 85 parts, 90 parts, etc.
The active effect of controlling the content of the diatomite to be 5-10 parts is that: the acid mist adsorbent can effectively agglomerate all components together, so that the acid mist adsorbent has good compression resistance and crushing resistance after being dried, crushing loss in the loading and unloading processes is avoided, and meanwhile dust is avoided. If the content of the diatomite is too high, the diatomite is in a certain rangeTo a certain extent, the pore canal structure of the acid mist adsorbent can be damaged, and SO is reduced 2 HCl and NO 2 The contact area of the acid gas and the acid mist adsorbent is equal, and the deacidification effect is affected; if the content of the diatomite is too low, the mechanical strength of the desulfurization and dechlorination agent is reduced to a certain extent, the diatomite is easy to crush, dust is easy to generate in the loading and unloading process, the pressure loss is easy to increase when the loading capacity is large, and the running cost is increased. Specifically, the content of the diatomaceous earth may be 5 parts, 8 parts, 10 parts, or the like.
The active effect of controlling the content of the active carbon to be 2-5 parts is that: not only can improve the toughness of the acid mist adsorbent, but also can improve the adsorption performance of the acid mist adsorbent on acid gas, and is beneficial to SO 2 HCl and NO 2 Is removed. The content of the activated carbon is too high, so that the mechanical strength of the acid mist adsorbent can be reduced to a certain extent, and the desulfurization and dechlorination effects of the acid mist adsorbent in a high temperature area are affected; if the content of the activated carbon is too low, the anti-pulverization performance of the acid mist adsorbent can be reduced to a certain extent, so that the acid mist adsorbent is easier to crush and pulverize under the conditions of high temperature and high humidity, the operation pressure loss is increased, and the acid mist adsorbent is unfavorable for practical application. Specifically, the content of the activated carbon may be 2 parts, 3 parts, 5 parts, or the like.
The positive effect of controlling the bentonite content to be 1-4 parts is that: so that the components of the acid mist adsorbent can be well bonded together and have certain mechanical strength. The content of the bentonite is too high, so that the desulfurization and dechlorination performances can be reduced to a certain extent; if the content of the bentonite is too low, the mechanical strength of the acid mist adsorbent can be affected to a certain extent, so that the acid mist adsorbent is easy to crush after being dried. Specifically, the bentonite may be contained in an amount of 1 part, 3 parts, 4 parts, etc.
The positive effect of controlling the content of pseudo-boehmite to be 1-3 parts is that: is favorable for the components of the acid mist adsorbent to have good dispersing effect after being mixed by adding water, improves the specific surface area of the acid mist adsorbent and promotes SO 2 HCl and NO 2 Is removed. The content of the pseudo-boehmite is too high, which can influence the deacidification effect of the acid mist adsorbent to a certain extent, especially on SO at high temperature 2 And NO 2 Is a removal effect of (a); if the content of the pseudo-boehmite is too low, the acid mist can be adsorbed to a certain extentThe components of the agent are unevenly distributed, thereby affecting the desulfurization and dechlorination effects. Specifically, the content of the pseudo-boehmite may be 1 part, 2 parts, 3 parts, or the like.
The active agent content is controlled to be 1-3 parts: can ensure that the acid mist adsorbent is used for SO at a high temperature section 2 And NO 2 l has good removal effect. The content of the active agent is too high, so that the mechanical strength of the acid mist adsorbent can be influenced to a certain extent, and the preparation cost can be increased; if the content of the active agent is too low, the deacidification effect of the acid mist adsorbent, especially SO at high temperature, can be affected to a certain extent 2 And NO 2 Is not limited, and the removal effect of the catalyst is realized. Specifically, the content of the active agent may be 1 part, 2 parts, 3 parts, or the like.
In some embodiments, the diatomaceous earth comprises at least one of: natural diatomite and artificial synthetic diatomite.
In some embodiments, the bentonite comprises at least one of: bauxite, montmorillonite, illite, talcum powder and attapulgite-like bentonite; and/or, the activated carbon comprises at least one of the following: wood activated carbon, coal activated carbon, and coconut activated carbon.
In some embodiments, the active agent comprises at least one of the following: industrial grade active ferric oxide, industrial grade active zinc oxide and industrial grade active magnesium oxide; and/or, the pseudo-boehmite is industrial pseudo-boehmite.
In the embodiment of the application, natural diatomite and artificial synthetic diatomite are selected as the active effects of the diatomite: the acid mist adsorbent can effectively agglomerate all components together, so that the acid mist adsorbent has good compression resistance and crushing resistance after being dried, crushing loss in the loading and unloading processes is avoided, and meanwhile dust is avoided.
The positive effects of selecting bauxite, montmorillonite, illite, talcum powder and attapulgite bentonite as bentonite are as follows: the components of the acid mist adsorbent can be well bonded together and have certain mechanical strength.
The active effects of the activated carbon are that the wood activated carbon, the coal activated carbon and the coconut activated carbon are selected: not only can improveThe toughness of the acid mist adsorbent can improve the adsorption performance of the acid mist adsorbent on acid gas, and is favorable for SO 2 HCl and NO 2 Is removed.
The active agent has the positive effects that the industrial grade active iron oxide, the industrial grade active zinc oxide and the industrial grade active magnesium oxide are selected as the active agent: can ensure that the acid mist adsorbent is used for SO at a high temperature section 2 HCl and NO 2 Has good removing effect.
The technical pseudo-boehmite is selected as the positive effect of the pseudo-boehmite: is favorable for the components of the acid mist adsorbent to have good dispersing effect after being mixed by adding water, improves the specific surface area of the acid mist adsorbent and promotes SO 2 HCl and NO 2 Is removed.
In a second aspect, the present application provides a method for preparing an acid mist adsorbent, for preparing the acid mist adsorbent according to any one of the embodiments of the first aspect, referring to fig. 1, the method includes:
s1, carrying out first mixing on steel slag micropowder with a set particle size, diatomite, activated carbon, bentonite, pseudo-boehmite and an active agent to obtain a raw material;
in some embodiments, the set particle size is less than 5 μm.
The set particle size refers to the particle size of the steel slag micro powder, and the positive effect of controlling the particle size of the steel slag micro powder to be less than 5 mu m is that: the acid mist adsorbent after drying has good mechanical strength. If the grain size of the steel slag micro powder is too high, physical macropores exist after the acid mist adsorbent is dried to a certain extent, and the mechanical strength is destroyed. The steel slag micropowder is ground and screened to obtain the particle size.
S2, adding water into the raw materials for secondary mixing, and controlling the proportion of the water to the raw materials to obtain a mixed material;
in some embodiments, the ratio of the water to the raw materials is 0.5-1:1.
the ratio of the control water to the raw materials is 0.5-1:1 positive effects: ensure the dispersity of each component of the acid mist adsorbent and realize good desulfurization, dechlorination and denitrification effects. If the addition amount of water is too high, the drying time of the acid mist adsorbent can be prolonged to a certain extent, the preparation cost is increased, and the performance of the acid mist adsorbent is unstable due to excessive dispersion of the acid mist adsorbent components, so that the desulfurization, dechlorination and denitrification effects are affected; if the addition amount of water is too low, the dispersibility of each component of the acid mist adsorbent can be reduced to a certain extent, and the desulfurization and dechlorination effects are affected. Specifically, the ratio of the water to the raw materials may be 0.5: 1. 0.8: 1. 1:1, etc.
The mixture may be left for 12-24 hours and then the next step S3 is performed.
S3, extruding the second mixed material, and drying and roasting to obtain an acid mist adsorbent; wherein the process parameters of the drying and the temperature of the firing are controlled.
In some embodiments, the process parameters of the drying include: drying temperature and drying time; wherein the drying temperature is 60-80 ℃, and the drying time is 2-4h.
The positive effects of controlling the drying temperature to be 60-80 ℃ and the drying time to be 2-4h are that: ensure the mechanical strength of the acid mist adsorbent. If the drying temperature is too high or the drying time is too long, the mechanical strength of the acid mist adsorbent can be reduced to a certain extent, and the surface of the acid mist adsorbent is cracked; if the drying temperature is too low or the drying time is too short, the water content of the acid mist adsorbent can be improved to a certain extent, so that the acid mist adsorbent cracks during high-temperature roasting. Specifically, the drying temperature may be 60 ℃, 70 ℃, 80 ℃ and the like, and the drying time may be 2 hours, 3 hours, 4 hours and the like.
The extrusion mode is vacuum extrusion, the shape is cylindrical, the length of the columnar acid mist adsorbent is between 5 and 30 millimeters, and the diameter is between 5 and 10 millimeters.
In some embodiments, the firing temperature is 500-800 ℃.
The positive effect of controlling the roasting temperature to be 500-800 ℃: not only can further remove residual moisture of the dried acid mist adsorbent, but also can promote the conversion of pseudo-boehmite into active alumina, improve the specific surface area of the acid mist adsorbent and is beneficial to SO 2 HCl and NO 2 Is removed. If the roasting temperature is too high, not only the mixture is added back to a certain extentLoss of the active carbon in the second stage can change FeOx in the crushed steel slag differentiation into a high valence state, which is unfavorable for SO in a high temperature section 2 And NO 2 Is removed; if the roasting temperature is too low, the decomposition degree of pseudo-boehmite and bentonite can be reduced to a certain extent, and the mechanical strength and the specific surface area of the acid mist adsorbent are affected. Specifically, the firing temperature may be 500 ℃, 600 ℃, 700 ℃, 800 ℃, or the like.
In some embodiments, the step of extruding the mixture, and then drying and roasting the mixture to obtain the acid mist adsorbent further comprises the following steps:
s4, crushing the acid mist adsorbent, and screening to obtain a granular acid mist adsorbent; wherein,
the crushing granularity of the acid mist adsorbent is 1-3mm, and the screening granularity of the acid mist adsorbent is 0.1-5mm.
The positive effect of controlling the breaking granularity of the acid mist adsorbent to be 1-3mm is that: ensure that the acid mist adsorbent and SO 2 HCl and NO 2 The contact area of the acid gas is equal, so that the acid-base reaction is facilitated, and the deacidification efficiency is improved; the control granularity range can also ensure that the operation pressure loss is not too high, and the operation components are reduced.
The positive effect of controlling the screening granularity of the acid mist adsorbent to be 0.1-5mm is that: the acid mist adsorbent crushed into particles is utilized to the maximum extent, and meanwhile, the actual operation deacidification effect and the operation pressure loss are ensured.
After step S4, the method further comprises: surface modification, modification methods include dipping, spraying, dipping, and the like.
The preparation method of the acid mist adsorbent has the advantages of simple preparation, short process flow, low cost and the like, and can greatly reduce the preparation and acid mist removal cost and improve the production efficiency.
The preparation method of the acid mist adsorbent is realized based on the acid mist adsorbent, and specific components of the acid mist adsorbent refer to the above embodiment, and because the preparation method of the acid mist adsorbent adopts part or all of the technical schemes of the above embodiment, the acid mist adsorbent has at least all the beneficial effects brought by the technical schemes of the above embodiment, and will not be described in detail herein.
The present application is further illustrated below in conjunction with specific examples. It should be understood that these examples are illustrative only of the present application and are not intended to limit the scope of the present application. The experimental procedures, which are not specified in the following examples, are generally determined according to national standards. If the corresponding national standard does not exist, the method is carried out according to the general international standard, the conventional condition or the condition recommended by the manufacturer.
Example 1
The components of the acid mist adsorbent are as follows:
80 parts of steel slag micropowder, 5 parts of diatomite, 2 parts of bentonite, 2 parts of active carbon, 1 part of pseudo-boehmite and 1 part of active ferric oxide. The preparation method of the acid mist adsorbent comprises the following steps:
grinding and sieving the steel slag micropowder, wherein the grain diameter is smaller than 5 microns. The materials are uniformly mixed according to the weight part ratio to obtain raw materials, and then a proper amount of water is added for wet mixing, wherein the weight ratio of the water to the raw materials is 0.5:1, preparing a mixture. The mixture is prepared into the granular acid mist adsorbent with the particle size of 0.1-5mm through the procedures of drying, roasting, crushing, screening and the like. The drying temperature is 60 ℃, and the drying time is 2 hours; the above calcination temperature was 500 ℃.
The experiment shows that the adsorbent has good adsorption effect on acid gas and SO 2 HCl and NO 2 The adsorption rate can reach more than 90 percent.
Example 2
The components of the acid mist adsorbent are as follows:
90 parts of steel slag micropowder, 10 parts of diatomite, 4 parts of bentonite, 5 parts of activated carbon, 3 parts of pseudo-boehmite and 3 parts of activated zinc oxide.
The preparation method of the acid mist adsorbent comprises the following steps:
grinding and sieving the steel slag micropowder, wherein the grain diameter is smaller than 5 microns. The materials are uniformly mixed according to the weight part ratio to obtain raw materials, and then a proper amount of water is added for wet mixing, wherein the weight ratio of the water to the raw materials is 1:1, preparing a mixture. The mixture is subjected to procedures of drying, roasting, crushing, screening and the like to prepare the columnar acid mist adsorbent with the length of 5-30 mm and the diameter of 5-10 mm. The drying temperature is 80 ℃, and the drying time is 3 hours; the above calcination temperature was 800 ℃.
The experiment shows that the adsorbent has good adsorption effect on acid gas and SO 2 HCl and NO 2 The adsorption rate can reach more than 95 percent.
Example 3
The components of the acid mist adsorbent are as follows:
85 parts of steel slag micropowder, 8 parts of diatomite, 3 parts of bentonite, 4 parts of active carbon, 2 parts of pseudo-boehmite and 1 part of active magnesium oxide.
The preparation method of the acid mist adsorbent comprises the following steps:
grinding and sieving the steel slag micropowder, wherein the grain diameter is smaller than 5 microns. The materials are uniformly mixed according to the weight proportion to obtain the raw materials. Adding a proper amount of water into the mixture for wet mixing, wherein the weight ratio of the water to the raw materials is 0.7:1. and then the acid mist adsorbent with the particle size of 0.5-3 mm is obtained after the procedures of drying, roasting, crushing, screening and the like. The drying temperature is 70 ℃, and the drying time is 3 hours; the above calcination temperature was 600 ℃. The experiment shows that the adsorbent has good adsorption effect on acid gas and SO 2 The HCl adsorption rate can reach more than 92 percent.
Example 4
The components of the acid mist adsorbent are as follows:
80 parts of steel slag micropowder, 7 parts of diatomite, 3 parts of bentonite, 5 parts of activated carbon, 3 parts of pseudo-boehmite and 2 parts of activated iron oxide.
The preparation method of the acid mist adsorbent comprises the following steps:
grinding and sieving the steel slag micropowder, wherein the grain diameter is smaller than 5 microns. The materials are uniformly mixed according to the weight proportion to obtain the raw materials. Adding a proper amount of water into the mixture for wet mixing, wherein the weight ratio of the water to the raw materials is 0.6:1. and then the acid mist adsorbent with the particle size of 0.5-3 mm is obtained after the procedures of drying, roasting, crushing, screening and the like. The drying temperature is 70 ℃, and the drying time is 4 hours; the above-mentioned roasting temperature is700 ℃. The experiment shows that the adsorbent has good adsorption effect on acid gas and SO 2 HCl and NO 2 The adsorption rate can reach more than 86 percent.
Example 5
The components of the acid mist adsorbent are as follows:
85 parts of steel slag micropowder, 8 parts of diatomite, 4 parts of bentonite, 4 parts of activated carbon, 2 parts of pseudo-boehmite and 1 part of active zinc oxide.
The preparation method of the acid mist adsorbent comprises the following steps:
grinding and sieving the steel slag micropowder, wherein the grain diameter is smaller than 5 microns. The materials are uniformly mixed according to the weight part ratio to obtain raw materials, and then a proper amount of water is added for wet mixing, wherein the weight ratio of the water to the raw materials is 0.8:1, preparing a mixture. The mixture is prepared into the granular acid mist adsorbent with the particle size of 0.1-5mm through the procedures of drying, roasting, crushing, screening and the like. The drying temperature is 60 ℃, and the drying time is 3 hours; the above calcination temperature was 550 ℃. The experiment shows that the adsorbent has good adsorption effect on acid gas and SO 2 The HCl adsorption rate can reach more than 95 percent.
Comparative example 1
Calcium hydroxide adsorbent, calcium hydroxide ratio: 100% by weight, the calcium hydroxide adsorbent was tested under the same conditions as the acid mist adsorbent of example 4 to adsorb SO 2 HCl and NO 2 。
Adsorption efficiency: about 70% of calcium hydroxide adsorbent and 92% or more of acid mist adsorbent.
Comparative example 2
Calcium hydroxide adsorbent, calcium hydroxide ratio: 50, the calcium hydroxide adsorbent was used to adsorb SO under the same conditions as the acid mist adsorbent of example 5 2 HCl and NO 2 。
Adsorption efficiency: about 60% of calcium hydroxide adsorbent and more than 90% of acid mist adsorbent.
From examples 4 and 1, 5 and 2, it was found that the acid mist adsorbent using the steel slag micropowder as a raw material had a remarkable advantage in adsorption efficiency over calcium hydroxide, and in particular, in comparative example 1, the adsorption efficiency of the acid mist adsorbent was as high as 90% or more, whereas calcium hydroxide was only about 70%, and it was found that the adsorption efficiency of the acid mist adsorbent was higher. Meanwhile, the preparation cost of the acid mist adsorbent is relatively low, so that the acid mist adsorbent has a better application prospect.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An acid mist adsorbent, characterized in that the components of the acid mist adsorbent comprise:
steel slag micropowder, diatomite, active carbon, bentonite, pseudo-boehmite and an active agent; wherein, the weight portions of the components are calculated,
80-90 parts of steel slag micropowder, 5-10 parts of diatomite, 2-5 parts of activated carbon, 1-4 parts of bentonite, 1-3 parts of pseudo-boehmite and 1-3 parts of active agent.
2. The acid mist sorbent of claim 1, wherein the diatomaceous earth comprises at least one of: natural diatomite and artificial synthetic diatomite.
3. The acid mist adsorbent of claim 1, wherein the bentonite comprises at least one of: bauxite, montmorillonite, illite, talcum powder and attapulgite-like bentonite; and/or, the number of the groups,
the activated carbon comprises at least one of the following: wood activated carbon, coal activated carbon, and coconut activated carbon.
4. The acid mist sorbent of claim 1, wherein the active agent comprises at least one of: industrial grade active ferric oxide, industrial grade active zinc oxide and industrial grade active magnesium oxide; and/or, the number of the groups,
the pseudo-boehmite is industrial pseudo-boehmite.
5. A method for producing the acid mist adsorbent, which is used for producing the acid mist adsorbent as claimed in any one of claims 1 to 4, characterized in that the method comprises:
firstly mixing steel slag micropowder with a set particle size with diatomite, active carbon, bentonite, pseudo-boehmite and an active agent to obtain a raw material;
adding water into the raw materials for secondary mixing, and controlling the proportion of the water to the raw materials to obtain a mixed material;
extruding the mixed material, and then drying and roasting to obtain an acid mist adsorbent; wherein the process parameters of the drying and the temperature of the firing are controlled.
6. The method of claim 5, wherein the set particle size is less than 5 μm.
7. The method of claim 5, wherein the ratio of water to the raw material is 0.5-1:1.
8. the method of claim 5, wherein the process parameters of the drying include: drying temperature and drying time; wherein,
the drying temperature is 60-80 ℃, and the drying time is 2-4h.
9. The method of claim 5, wherein the firing temperature is 500-800 ℃.
10. The method according to claim 5, wherein the step of extruding the mixture, followed by drying and calcination, to obtain the acid mist adsorbent, further comprises the steps of:
crushing the acid mist adsorbent, and screening to obtain a granular acid mist adsorbent; wherein,
the crushing granularity of the acid mist adsorbent is 1-3mm, and the screening granularity of the acid mist adsorbent is 0.1-5mm.
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