CN114247429A - Stearic acid derivative organic odor deodorization system - Google Patents
Stearic acid derivative organic odor deodorization system Download PDFInfo
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- CN114247429A CN114247429A CN202111319469.8A CN202111319469A CN114247429A CN 114247429 A CN114247429 A CN 114247429A CN 202111319469 A CN202111319469 A CN 202111319469A CN 114247429 A CN114247429 A CN 114247429A
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- stearic acid
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- acid derivative
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- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical class CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000004332 deodorization Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000000945 filler Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002912 waste gas Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 19
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910001868 water Inorganic materials 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000004696 coordination complex Chemical class 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 6
- 150000002191 fatty alcohols Chemical class 0.000 claims abstract description 6
- KMZHZAAOEWVPSE-UHFFFAOYSA-N glycerol monoacetate Natural products CC(=O)OCC(O)CO KMZHZAAOEWVPSE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011812 mixed powder Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 239000003960 organic solvent Substances 0.000 claims abstract description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-M dihydrogenphosphate Chemical compound OP(O)([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-M 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000006247 magnetic powder Substances 0.000 claims abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 4
- 230000007062 hydrolysis Effects 0.000 claims abstract 3
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract 3
- 229920002521 macromolecule Polymers 0.000 claims abstract 2
- 239000010410 layer Substances 0.000 claims description 40
- 230000003197 catalytic effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 238000006731 degradation reaction Methods 0.000 claims description 14
- 239000002250 absorbent Substances 0.000 claims description 13
- 230000002745 absorbent Effects 0.000 claims description 13
- 230000015556 catabolic process Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000005187 foaming Methods 0.000 claims description 8
- 229910044991 metal oxide Inorganic materials 0.000 claims description 8
- 150000004706 metal oxides Chemical class 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000004088 foaming agent Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- -1 bismuth-magnesium-barium-iron Chemical compound 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- 239000011229 interlayer Substances 0.000 claims description 2
- 239000003444 phase transfer catalyst Substances 0.000 claims description 2
- 239000004566 building material Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 231100000053 low toxicity Toxicity 0.000 claims 1
- 230000005415 magnetization Effects 0.000 claims 1
- 239000002905 metal composite material Substances 0.000 claims 1
- 239000002904 solvent Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 9
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 239000010815 organic waste Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
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- 230000004913 activation Effects 0.000 description 2
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- 239000003814 drug Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000010806 kitchen waste Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
-
- 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
- B01D53/04—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 with stationary adsorbents
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a stearic acid derivative organic odor deodorization system, relates to the technical field of chemical reagents, is used for the technical field of environmental protection, and comprises the following sequential process steps: the method comprises the following steps: dissolving MgO and Bi2O3 powder, MgSO 4. H2O and dihydrogen phosphate in dilute sulfuric acid, adjusting the pH value until the pH value is between 4.2 and 4.5, violently stirring under nitrogen flow until the mixture is dried, washing with deionized water, and drying in vacuum for 4 hours to obtain metal powder. Step two: taking mixed powder (4:1) of Fe2CrGe2Te2 and BaO, adding 1:1 volume ratio of absolute ethyl alcohol to deionized water, adjusting the pH value to 4-5, performing ultrasonic dispersion for 1h, adding fatty alcohol ether sodium sulfate, continuing to mechanically stir for 0.5h, heating to 220 ℃ and reacting for 8-12h to obtain magnetic powder. Step three: adding glycerol/ethyl acetate containing (BU4N) Br organic solvent with V/V of 1:1 into the powder, adding a small amount of dilute sulfuric acid for hydrolysis, simultaneously adding acetylacetone, and finally drying in vacuum to obtain the metal complex filler. The stearic acid derivative waste gas of macromolecule can be effectively degraded into micromolecular substance, and the micromolecular substance becomes nontoxic and pollution-free clean gas after being filtered and discharged.
Description
Technical Field
The invention relates to an absorbent for absorbing organic odor of stearic acid derivatives by magnetized metal oxides and a mechanical system matched with the absorbent, in particular to a preparation method of a metal complex absorbent, which is used in the technical field of environmental protection.
Background
The problem that organic waste gas with large molecular weight is difficult to degrade and secondary pollution after degradation is solved, especially the organic odor of the stearic acid derivative is generally removed by an absorption method, but in the absorption process, macromolecular organic matters easily block pores, so that the service life and the adsorption efficiency of the adsorbent are reduced; the absorption process does not degrade the high molecular organic matters, so that a large amount of organic wastewater pollution is easily caused in the washing process; and the adsorbed adsorption material contains various high molecular organic pollutants, so that the treatment and disposal problems exist.
Aiming at the problem of waste absorption generated after an absorption method, relevant search of the prior art shows that the adsorbent can be recycled by developing a novel material with high eluted capacity and eluting and adsorbing impurities through a back washing process.
Simultaneously, through spraying bubble circulation technique, can make stearic acid waste gas longer on the dwell time of reaction tower, make the liquid drop adsorb the pollutant, can promote the area of contact of gas-liquid like this, improve organic waste gas's degradation efficiency.
Disclosure of Invention
The invention provides an odor treatment system capable of solving the problems aiming at the conditions that the stearic acid derivative type odor is difficult to degrade and the odor response value after degradation is higher. The absorbent is composed of a metal oxide absorbent and corresponding mechanical equipment.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of an organic magnetized metal oxide organic odor absorbent comprises the following sequential process steps:
the method comprises the following steps: mixing MgO and BI2O3 powder in a mass ratio of 3: 1 and MgSO 4. H2O and dihydrogen phosphate were dissolved in dilute sulfuric acid and the pH was adjusted to between 4.2 and 4.5 by the addition of NaOH. Vigorously stirring to dry at 70 ℃ under nitrogen flow (40mol/min), repeatedly washing with deionized water, and vacuum drying for 4 hours to obtain the metal powder.
Step two: mixing the mixed powder (4:1) of Fe2CrGe2Te2 and BaO with the metal powder in a molar ratio (1: 3), adding 1:1 volume ratio of absolute ethyl alcohol and deionized water, adjusting the pH value to 4-5, carrying out ultrasonic dispersion for 1h, (adding fatty alcohol ether sodium sulfate (added according to the molar ratio of 100: 1 of the added metal powder)) continuously and mechanically stirring for 0.5h, heating to 220 ℃, and reacting for 8-12h to obtain the magnetic powder.
Step three: adding glycerol/ethyl acetate containing (BU4N) Br as organic solvent into the powder, hydrolyzing with small amount of dilute sulfuric acid, electrolyzing at 200mA/h under stirring at 50 deg.C while adding acetylacetone, and vacuum drying to obtain stearic acid derivative adsorbent.
And (3) deodorization process:
the method comprises the steps of turning on an ultraviolet lamp and a heating wire (an engineering project with a boiler system is provided, and high-temperature boiler gas can enter a heat-preservation interlayer of a degradation tower through a boiler gas inlet to achieve the purpose of heating a reactor), preheating the system, turning on a circulating spraying system after reaching a specified temperature, and simultaneously controlling the introduction amount of stearic acid derivative waste gas to treat odor, wherein firstly, fine complex distribution in a packing layer filters particulate matters in the packing layer. Macromolecular organic matters in odor are degraded and adsorbed after double catalysis of 3-fold ultraviolet light and a metal complex in a double-layer packing layer, finally, liquid drops and floating foam of the system are dispersed in an ultrasonic demister on the uppermost layer, the falling reaction tower is subjected to circulating treatment again to obtain further degradation, and finally clean and pollution-free clean gas is discharged from a gas outlet.
And (3) cleaning:
the cleaning system adopts full automatization operation, when the export detector detects that gas parameters do not reach standard, the gas is temporarily stopped and is admitted, elution liquid medicine is added from the medicine feeding port, the flow of the lifting system is started to spray and clean, the system cleans an ultrasonic defoaming layer and a double-layer catalytic reaction layer from top to bottom, and the circulating flushing is carried out through a circulating pump.
Waste treatment:
after repeated cyclic flushing, when the filler reaches the upper limit of use, the filler is discharged into a waste treatment pool, a foaming agent, an accelerating agent and a thickening time control agent are added into the pool, the mixture is uniformly mixed and then added into a mould for foaming and molding, and the foaming cement is prepared and transported outside for recycling. The foamed cement prepared by the process has good stability, can effectively fix metal ions and organic pollutants in a metal complex, and can meet the relevant requirements of toxicity standards by detecting the leaching toxicity of the material after being leached by a determination method for leaching harmful substances in wall materials (GB/T39804-.
According to the treatment requirements, the equipment can control the temperature, preserve heat, resist organic corrosion, and is provided with a catalytic adsorption packing layer, an ultraviolet catalytic lamp and a spraying system.
Preferably, in the first step, metal magnesium and metal bismuth with higher catalytic performance are selected as main metal catalytic ions to react under an acidic condition, so that a powdery metal complex compound with better catalytic performance and formed by compounding the two metal ions is obtained.
Preferably, in the second step, the mixed powder (4:1) of Fe2CrGe2Te2 and BaO is subjected to the compound action with the anhydrous ethanol and the fatty alcohol ether sodium sulfate to enable the metal complex to be magnetized, so that the catalytic adsorption efficiency of the reaction material is further improved.
Preferably, in the third step, under the action of a phase transfer catalyst (BU4N) Br and under the condition of an organic solvent glycerol/ethyl acetate, V/V being 1:1, the material performance is changed through electrolysis, and finally the novel material with both catalysis and absorption of the stearic acid derivative waste gas is obtained after the external stabilization of acetylacetone is compounded.
In order to be able to maximize the efficiency of the application of the material, the patent is also equipped with a corresponding exhaust gas treatment device:
preferably, the waste gas treatment device consists of a water storage layer, a reaction layer and an ultrasonic filter layer, and is provided with an automatic spraying system through a central control system. The reaction layer mainly comprises a double-layer catalyst layer, a 3-fold ultraviolet catalytic lamp and a heating pipe, and the outer layer is provided with a heat insulation layer for heating the waste heat of the boiler.
The invention has the beneficial effects that: through the preparation of the high-performance catalytic filler, the macromolecular stearic acid derivative waste gas can be effectively degraded into micromolecular substances under the auxiliary action of ultraviolet light, and the micromolecular stearic acid derivative waste gas becomes nontoxic and pollution-free clean gas after being filtered and is discharged. And through the circulating spraying system, the degradation efficiency is further improved through the adsorption effect of liquid drops, so that the organic matters are circularly degraded in the whole system, and the problem of treatment of high-concentration organic wastewater which is possibly generated is solved. And the adsorption and catalysis capability of the material is recovered through a showering regeneration system with the filler, so that high-efficiency recycling is achieved.
Description of the drawings: FIG. 1 is a schematic view of an exhaust gas treatment device used in the present invention.
In the figure: 1. the device comprises a box body, 2 an ultrasonic demister, 3 an ultrasonic emission terminal, 4 an annular ultraviolet lamp, 5 an annular heater, 6 an absorbent filtering layer, 7 an air inlet, 8 an air outlet, 9 a partition board, 10 a water storage tank, 11 a heat preservation shell layer, 12 a boiler air inlet, 13 a dosing port, 14 an air online monitoring device and 15 a circulating pump.
The specific implementation mode is as follows:
stearic acid derivative organic waste gas treatment: example one
The synthesis process of the material is completed in a scientific research laboratory at certain university in Guangzhou, and the main steps comprise the following three main processes:
the method comprises the following steps: mixing MgO and Bi2O3 powder in a mass ratio of 3: 1 and MgSO 4. H2O and dihydrogen phosphate were dissolved in dilute sulfuric acid and the pH was adjusted to between 4.2 and 4.5 by the addition of NaOH. Vigorously stirring to dry at 70 ℃ under nitrogen flow (40mol/min), repeatedly washing with deionized water, and vacuum drying for 4 hours to obtain the metal powder.
Step two: mixing a mixed powder (4:1) of Fe2CrGe2Te2 and BaO with the metal powder in a molar ratio (1: 3), adding 1:1 volume ratio of absolute ethyl alcohol and deionized water, adjusting the pH value to 4-5, carrying out ultrasonic dispersion for 1h, (adding fatty alcohol ether sodium sulfate (added according to the molar ratio of 100: 1 of the added metal powder)) continuously and mechanically stirring for 0.5h, heating to 220 ℃, and reacting for 8-12h to obtain the magnetic powder.
Step three: adding glycerol/ethyl acetate containing (BU4N) Br organic solvent into the powder, hydrolyzing with a small amount of dilute sulfuric acid, adding acetylacetone while controlling the temperature at 50 deg.C under stirring at an electrolytic current of 200mA/h, and vacuum drying to obtain complex filler containing metal catalyst.
And (4) storing the prepared filler in a low-temperature drying warehouse for later use. In order to ensure the effectiveness of the material, the material should be stored for no more than 12 months and prepared after use.
Laboratory treatment process of stearic acid derivative organic odor deodorization system:
the source of the waste gas is as follows: waste gas is collected by a certain kitchen waste transfer station in Guangzhou city, after the waste in the kitchen waste in the waste treatment station is subjected to high-temperature fermentation in summer, the generated odor contains a large amount of hydrocarbon and volatile fatty acid waste gas, according to the detection of related personnel in the emission standard of odor pollutants (DB12/059-3。
Material activation: adding complex filler containing metal catalyst into the filler area in the reaction layer to obtain a double-layer filler layer with the diameter of 1000mm and the height of 50mm, measuring the density of the filler to be 2.89g/mL, opening a circulating flushing system for flushing for about 30 minutes, and activating the reaction layer. And closing the flushing system, opening all the annular ultraviolet lamp tubes and the heater to preheat the machine for about 10 minutes, and introducing stearic acid derivative waste gas for treatment when the display temperature of the control panel surface reaches more than 50 degrees.
Introducing the waste gas of a treatment station into an activated degradation system at a flow rate of 40L/h, opening a spraying system to enable the waste gas to sequentially pass through a catalytic degradation reaction layer and an ultrasonic defoaming filtering layer, efficiently degrading the waste gas into small molecular substances under the double-layer action of ultraviolet rays and metal ions in catalytic filler when the waste gas passes through a high-temperature ultraviolet catalytic layer, intercepting the small molecular substances in the system through the filtering layer, discharging pollution-free gas from an exhaust port, and finally detecting the concentration of the obtained outlet waste gas VOC to be 16mg/m3The VOC removal efficiency was 98.8% and the dimensionless concentration of odor was reduced to 34. After a treatment of about 10 hours (with a suitably shortened interval between spray rinses as the time of use of the filler increases), the VOC concentration of the detector was found to rise to 30-40mg/m3And closing air inlet, opening a spraying system, spraying and cleaning for about 30min, mixing the mixed organic matter liquid drops to fall along with gravity in a catalytic degradation system under the spraying effect to obtain further degradation, and finally, allowing the water body with lower pollution concentration to enter a water storage layer from an opened partition plate for recycling, wherein the content is continuously reduced in the circulating process. After the cleaning wastewater in the water storage layer is cleaned for 10 times, the VOC concentration at the air outlet is detected to be 18mg/m3The filler still has strong catalytic degradation efficiency. Meanwhile, the TOC in the water body obtained by detection is about 120mg/L, the requirement of entering a municipal sewage treatment plant for treatment is met, and the cleanness of the spraying system is ensured by timely replacing the effluent of the water storage layer.
When the gas outlet monitor still monitors that the content of pollutants exceeds the standard after flushing, the filler needs to be replaced in time, the foaming agent, the accelerating agent and the coagulation regulator are added into the filler of the waste gas, the stirrer is opened, the mixture is uniformly mixed and poured into a mould for foaming and molding, the foaming cement without leached toxicity is prepared, and the foaming cement is transported outside for recycling.
Stearic acid derivative organic waste gas treatment: example two
The stearic acid material was prepared, activated in accordance with example one, but on a filler scale of 1800mm diameter by 1000mm height filler 2, and with a filler density of 2.87 g/mL.
The source of the waste gas is as follows: shenzhen a certain msw incineration factory in city, waste collecting tank waste gas. Through detection: the VOC concentration in the exhaust gas was about 803mg/m3The dimensionless concentration of odor was 230.
The system device leads partial tail gas of the incineration plant boiler at 50-100 ℃ into a heat insulation layer of a reaction tower to carry out preheating and heating of the system, and the arrangement of three layers of heating rings is cancelled.
The flow rate of this example was 20m due to the increase in the scale of the treatment3And h, in order to ensure that the ultraviolet light exposure is kept stable, a 200W high-power ultraviolet lamp is used for carrying out experiments. After one hour of stabilization, the monitored VOC concentration at the outlet was reduced to 27mg/m3The dimensionless odor concentration was reduced to 23, and about 96% or more of the VOC was effectively removed, but the removal efficiency was reduced from the original one, presumably because the increase in the flow rate in the examples resulted in an insufficient reaction compared to the laboratory mode, resulting in an increase in the VOC concentration, which still met the environmental pollutant level criteria. Accordingly, about 8 hours later (as the time of use of the packing increases, the time of the shower rinsing interval is appropriately shortened) due to the increase of the treatment flow rate, shower cleaning is performed for about 30 min. After 10 times of spraying, the filler still has the VOC removal efficiency of more than 95%, and meanwhile, the circulating waste liquid detects that the TOC content is 150mg/L, so that the relevant requirements of sewage entering a municipal pipe network are met, and the parallel pipe treatment is carried out.
Stearic acid derivative organic waste gas treatment: example three
Preparation of stearic acid material activation procedure was identical to example two, producing a filler x 2 of 3000mm diameter and 1500mm height, with a filler density of 2.86 g/mL.
The source of the waste gas is as follows: some soft magnetic manufacturing plant in Guangzhou City. Detection by a VOC detector: the VOC concentration in the industrial production waste gas of the plant is about 962mg/m3No odorThe dimensional concentration is 200.
The treatment flow rate of the exhaust gas was 30m3and/L, and heating the reaction tower through a boiler heat cycle. Meanwhile, in order to ensure that the light exposure of the ultraviolet light is kept stable, a double-layer 200W high-power ultraviolet lamp is used for carrying out an experiment, and after one hour of stabilizing treatment, the VOC monitoring concentration at an outlet is reduced to 40mg/m3The VOC degradation efficiency reaches more than 95 percent, the dimensionless concentration of the odor is reduced to 20, and the odor is obviously improved. After about 9 hours, a spray rinse of about 30min was performed. The generated circulating water is replaced once in about 10 days, the pollution of the circulating water is light, and the circulating water is directly discharged through a pipeline. After multiple back washing, the waste losing catalytic efficiency is collected and discharged into a waste treatment cylinder, a foaming agent, an accelerating agent and a coagulation regulator are added, the mixture is uniformly mixed and then added into a mould for foaming and molding, and the foamed cement is prepared and transported for recycling.
The above-described embodiments are merely preferred examples of the present invention, and not intended to limit the scope of the invention, so that equivalent changes or modifications in the structure, features and principles of the invention described in the claims should be included in the claims.
Claims (9)
1. A preparation method of an organic magnetized metal oxide organic odor absorbent is characterized by comprising the following steps: the method comprises the following process steps in sequence:
the method comprises the following steps: mixing MgO and Bi2O3 powder, MgSO 4. H2O and dihydrogen phosphate at a molar ratio of 3: 1: 1: dissolving 1 in dilute sulfuric acid, adding NaOH to adjust the pH value until the pH value is between 4.2 and 4.5, violently stirring at 70 ℃ under nitrogen flow (40mol/min) until the mixture is dried, repeatedly washing with deionized water, and then drying in vacuum for 4 hours to obtain metal powder;
step two: mixing a mixed powder (4:1) of Fe2CrGe2Te2 and BaO with the metal powder in a molar ratio (1: 3), adding 1:1 volume ratio of absolute ethyl alcohol and deionized water, adjusting the pH value to 4-5, performing ultrasonic dispersion for 1h, (adding fatty alcohol ether sodium sulfate according to the molar ratio of 100: 1 of the added metal powder), continuing to mechanically stir for 0.5h, heating to 220 ℃ and reacting for 8-12h to obtain magnetic powder;
step three: adding glycerol/ethyl acetate containing (BU4N) Br organic solvent with V/V of 1:1 into the powder, adding a small amount of dilute sulfuric acid for hydrolysis, performing electrolysis at 200mA/h under stirring at 50 ℃, adding acetylacetone, and finally performing vacuum drying to obtain the metal complex filler.
2. The method for preparing an organic magnetized metal oxide organic odor absorbent according to claim 1, wherein the method comprises the following steps: the base material of the complex is prepared by mixing MgO and Bi2O3 powder, MgSO 4. H2O and dihydrogen phosphate with the molar ratio of 3: 1: 1:1 is dissolved in dilute sulphuric acid, the PH is adjusted to between 4.2 and 4.5, and then the product is prepared by washing and drying.
3. The method for preparing an organic magnetized metal oxide organic odor absorbent according to claim 1, wherein the method comprises the following steps: adding fatty alcohol ether sodium sulfate (added according to the molar ratio of 100: 1 of the added metal powder) and mixed powder (4:1) of Fe2CrGe2Te2 and BaO, and under the common magnetization effect, leading the synthesized complex filler to be magnetic.
4. The method for preparing an organic magnetized metal oxide organic odor absorbent according to claim 1, wherein the method comprises the following steps: an organic solvent of glycerol/ethyl acetate (V/V ═ 1:1) containing phase transfer catalyst (BU4N) Br was used as a solvent to prepare a stearic acid off-gas removal packing having catalytic adsorption efficacy by a hydrolysis process of dilute sulfuric acid.
5. The method for preparing an organic magnetized metal oxide organic odor absorbent according to claim 1, wherein the method comprises the following steps: the stearic acid derivative odor treatment system comprises a main catalytic reaction tower, wherein the main catalytic reaction tower consists of a water storage layer, a reaction layer and a filter layer from bottom to top, and the reaction layer consists of a double-layer complex absorbent filler, 3 annular ultraviolet catalytic lamp tubes and 3 annular heating wires or boiler heating interlayers.
6. The stearic acid derivative odor treatment system according to claim 5, wherein: the stearic acid waste gas is adsorbed by the liquid drops generated by the spraying system, the contact area of the reaction is increased, and the liquid drops are prevented from being discharged out of the system through the ultrasonic filtering layer, so that the liquid drops and the stearic acid macromolecular substances are circularly degraded in the degradation tower.
7. The stearic acid derivative odor treatment system according to claim 5, wherein: under the combined action of the bismuth-magnesium-barium-iron metal composite complex catalyst and high-temperature ultraviolet light, a composite efficient degradation system is formed.
8. The stearic acid derivative odor treatment system according to claim 5, wherein: the metal complex filler losing effectiveness after being repeatedly utilized can be added with a foaming agent, an accelerating agent and a setting regulator, and the mixture is uniformly mixed and then added into a mould for foaming and molding to prepare the foaming cement building material with low toxicity for recycling.
9. The stearic acid derivative odor treatment system according to claim 5, wherein: the filler used is a metal complex having high performance for the absorption and removal of the odor of stearic acid derivatives prepared in the process according to claim 1.
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