CN113648789A - Kitchen flue gas CO2Catch and absorb liquid medium/ball and have its smoke ventilator - Google Patents

Kitchen flue gas CO2Catch and absorb liquid medium/ball and have its smoke ventilator Download PDF

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CN113648789A
CN113648789A CN202110938214.3A CN202110938214A CN113648789A CN 113648789 A CN113648789 A CN 113648789A CN 202110938214 A CN202110938214 A CN 202110938214A CN 113648789 A CN113648789 A CN 113648789A
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organic amine
amine
coupling agent
flue gas
kitchen
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苏文雯
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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
    • B01D53/14—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 absorption
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • B01D53/14—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 absorption
    • B01D53/1456—Removing acid components
    • B01D53/1475—Removing carbon dioxide
    • 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
    • B01D53/14—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 absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2057—Removing cooking fumes using a cleaning liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/20—Organic absorbents
    • B01D2252/204—Amines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • 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
    • B01D2258/0275—Other waste gases from food processing plants or kitchens
    • 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
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to kitchen flue gas CO2The trapping and absorbing liquid medium is composite organic amine which is formed by compounding a straight-chain organic amine solution and a cyclic organic amine solution, wherein the mass ratio of m (the straight-chain organic amine solution) to m (the cyclic organic amine solution) is 6-8:1-3, and the mass volume concentration of the mixed organic amine is 40-50%. The invention selects the linear organic amine and the cyclic organic amine in a specific proportion range to aim at the kitchen smoke CO2Has the effects of high absorption rate, large absorption capacity, low regeneration energy consumption and convenient recycling.

Description

Kitchen flue gas CO2Catch and absorb liquid medium/ball and have its smoke ventilator
Technical Field
The invention relates to a liquid medium for capturing and absorbing kitchen flue gas CO2, in particular to a liquid medium for capturing and absorbing kitchen flue gas CO2, a capturing and absorbing ball, a preparation method and a range hood with the same, and belongs to kitchen flue gas CO22Capture and absorption field.
Background
Global warming has become an international hotspot problem, seriously harms the balance of a natural ecosystem, threatens the food supply and living environment of human beings, and brings great change and influence to the global environment; the United nations climate Change framework convention and the Kyoto protocol require industrialized nations to fulfill control of CO2And the responsibility of waiting for the emission of greenhouse gases, how to reduce the emission of carbon dioxide and the concentration of carbon dioxide in the atmosphere is a common problem faced by human beings.
The 'carbon emission' of the family is closely related to the kitchen and is in developmentThe average carbon emission per household in china of (2.7) tons/year; the average carbon emission of every family in the United kingdom is 10 tons/year, the average carbon emission of every family in the United states is 20 tons/year, although energy in a kitchen is saved as much as possible, the method can be practically realized by every family by adopting a low-carbon cooking method, however, the total carbon emission is large because China has a large population, and one family can cook 2 hours per day on average according to the consumption of 0.5 cubic meter of natural gas, and about 1000g of CO is generated by 0.5 cubic meter of natural gas2Since 500L/22.4L/mol is 22.32mol and 22.32mol × 44g/mol is 1000g, CO is generated in the kitchen2The absorption and the capture are particularly important, and the research is suitable for the kitchen smoke channel CO in the smoke exhaust ventilator2Absorption and capture of CO for reducing household emission2Has very important value and significance, and no CO emission aiming at family emission is found at present2The related reports of (1).
Disclosure of Invention
The invention aims to solve the technical problem of providing kitchen flue gas CO2Preparation method of liquid capturing and absorbing medium and range hood with same, and aims to solve problem of kitchen smoke CO2The problem of discharge, and can provide domestic plant nutrition.
The technical scheme for solving the technical problems is as follows: kitchen flue gas CO2The trapping and absorbing liquid medium is composite organic amine which is formed by compounding a straight-chain organic amine solution and a cyclic organic amine solution, wherein the mass ratio of m (the straight-chain organic amine solution) to m (the cyclic organic amine solution) is 6-8:1-3, and the mass volume concentration of the mixed organic amine is 40-50%.
The linear organic amine solution and the cyclic organic amine solution may be prepared from a conventionally used solvent such as water.
The invention has the beneficial effects that: the invention selects the linear chain organic amine solution and the cyclic organic amine solution to obtain the mixed organic amine with specific concentration in a specific proportion range, and can aim at the kitchen flue gas CO2Has the effects of high absorption rate, large absorption capacity, low regeneration energy consumption and convenient recycling, and is beneficial to the CO in the kitchen flue gas2Absorption of (2).
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the linear-chain organic amine consists of primary amine, secondary amine and tertiary amine, wherein the mass ratio of the primary amine to the secondary amine to the tertiary amine is m (the primary amine organic amine), m (the secondary amine organic amine) and m (the tertiary amine) is 5-7: 2-3: 1-2.
Further, the primary amine is: diethylenetriamine (DETA) H2NCH2CH2NH CH2CH2NH2Triethylene tetramine (TETA) H2N(C2H4)2C2H4NH2Tetraethylenepentamine (TEPA) H2N(CH2CH2NH)3CH2CH2NH2Pentaethylenehexamine (PEHA) H2N(CH2CH2NH)4CH2CH2NH2Methylamine CH3NH2Ethylene diamine H2NCH2CH2NH2Ethanolamine (MEA) H2NCH2CH2One or more of OH;
the secondary amine is diisopropylamine [ (CH)3)2CH]2NH, Diethanolamine (DEA) HO (CH)2)2NH(CH2)2OH, N-methylethanolamine CH3NHCH2CH2OH, N-ethylethanolamine CH3CH2NHCH2CH2One or more of OH;
the secondary amine is tertiary amine and mainly comprises: triethanolamine (TEA) N (CH)2CH2OH)3N, N-Dimethylformamide (DMF) HCON (CH)3)2N, N-Diethylethanolamine (DEEA) (CH)3CH2)2NCH2CH2OH, N-DimethylEthanolamine (DEEA) (CH)3)2NCH2CH2OH, N-methyl glycol olamine (MDEA) CH3N(CH2CH2OH)2One or more of them;
the cyclic organic amine is one or more of cyclic Piperazine (PZ), 3-piperidine propylamine 3PDPA, 3-dimethylamino-1-propylamine DMAPA, 3-diethylamino-1-propylamine DEAPA, AMP 2-amino-2-methyl-1-propanolamine, 2-amino-2-ethyl-1, 3-propanediol (AEPD) and 2-amino (methyl) -1, 3-propanediol (AHMPD). More preferred are sterically hindered amines.
Wherein the linear organic amine is classified into a primary amine (such as MEA (ethanolamine)), a secondary amine (such as DEA (diethanolamine)) and a tertiary amine (such as MDEA (N-methyldiethanolamine)) according to the number of hydrogen atoms bonded to an amino nitrogen atom; the primary amine and secondary amine absorbents are capable of reacting with CO2The carbamate group is formed by combining the tertiary amine and CO only as a weak base without hydrogen atoms on the amino nitrogen atom2React with CO but cannot react with CO2Formation of carbamate groups in combination, which results in the reaction rate of the tertiary amine being significantly slower than that of the primary and secondary amines; in CO2In the absorption capacity of (1), typically the CO of the primary and secondary amines2Has a theoretical absorption capacity of not less than 0.5molCO2Per mol of absorbent, and tertiary amines can reach more than or equal to 1mol of CO2Per mol of absorbent;
piperazine and its derivatives have a very fast interaction with CO due to their special cyclic structure2The reaction rate is high, and simultaneously, the reaction has higher CO2Capacity of absorption. The most commonly used sterically hindered amine is AMP (e.g. AMP 2-amino-2-methyl-1-propanolamine) in which at least one amino group is bonded to a secondary or tertiary carbon atom, resulting in a very significant steric hindrance effect, which is similar to MEA in structure, but two methyl groups are bonded to the alpha-carbon atom, which results in instability of the resulting carbamate, which is easily hydrolyzed to HCO－3CO of sterically hindered amines2The absorption capacity is greater than that of non-hindered and secondary amine solvents, but the problem is that it is low in CO2CO under load2The mass transfer efficiency is low; sterically hindered amines promote their CO by reducing their stability to carbamates2Absorb capacity, thereby causing it to generate more HCO－3Thus being beneficial to reducing the energy consumption in the solvent regeneration process and absorbing CO by the sterically hindered amine2Later easier desorption and for CO2The theoretical absorption capacity of the catalyst is more than or equal to 1mol of CO2Mol absorptionAnd (4) collecting the agent.
CO absorption based on mixed organic amine2The organic amine with high absorption rate and the organic amine with high desorption rate are combined and act synergistically to obtain the absorbent with better comprehensive absorption effect, and the requirements of high absorption rate, high absorption capacity, low reaction heat and the like are difficult to simultaneously meet by using a single absorbent.
According to the invention, organic amines with different characteristics are mixed through experiments, so that CO suitable for kitchen flue gas with high absorption rate and absorption capacity, low regeneration energy consumption and low loss is obtained2The absorbent is prepared by mixing two to three single organic amine solutions according to different proportions to obtain new CO2Capture solvents, with relatively complementary and synergistic effects.
The first principle of the invention is that primary amine or secondary amine with higher absorption rate is taken as a main body, other amines (such as MDEA) are added to reduce regeneration energy consumption and improve the overall performance of the absorbent, and after the MDEA is added into the aqueous solution of MEA, the effect of obviously reducing CO2The trapped regeneration energy consumption is characterized in that the mixed amine absorbent composed of MEA, tertiary amine (DMEA, DEEA) and hindered Amine (AMP) has the characteristics that the circulating capacity of the composed mixed amine absorbent is higher than that of the MEA absorbent under the same concentration, wherein the mixed amine absorbent composed of MEA and AMP has the best absorption capacity, and after a PZ solvent is added into an AMP solution, the mass transfer efficiency is greatly improved, so that CO can be effectively reduced2Capture investment costs in the industry; converting MEA into additive to be added into tertiary amine solution to increase CO of tertiary amine solution2Capture efficiency; built solutions obtained by mixing two or more single amine solvents, their CO2The absorption capacity is reduced compared with that of a single tertiary amine solution, but the vapor pressure of the solvent in the regeneration process is changed, the vapor pressure is lower than that of two single amine solvents, and for the performance screening of a mixed system of three single amine solvents, not only the CO needs to be considered2The capture performance, especially considering the complex thermodynamic performance, the thermal degradation performance, the corrosivity and the like, the invention reasonably matches the primary amine, the secondary amine, the tertiary amine and the cyclic organic amine, and the maximum adsorption efficiency in the kitchen smoke adsorption is cooperatively exerted.
The invention also provides another kitchen flue gas CO2The preparation method of the catching absorption ball comprises the steps of (1) carrying out acid and alkali cleaning and impurity removal on an inorganic porous material and carrying out surface modification, wherein a surface modification agent used for the surface modification is a composite coupling agent, the composite coupling agent comprises 85-91% of a silane coupling agent, 7.2-12.2% of an aluminate coupling agent and 0.18-5.18% of a titanate coupling agent in mass ratio,
the inorganic porous material is subjected to acid and alkali washing for impurity removal, specifically, the inorganic porous material is placed in a diluted acid solution with a certain concentration, stirred for 1.5 hours at the temperature of 60 ℃, washed to be neutral by deionized water and tested by a pH test paper; in the pretreatment process of the inorganic porous material, the dilute acid is selected from one of dilute sulfuric acid, dilute hydrochloric acid and dilute nitric acid; the pretreatment is carried out by removing impurities with weak corrosive dilute acid, the surface condition of the inorganic carrier material is not damaged, and the method is mainly used for removing impurities in the inorganic porous carrier. Placing the pretreated inorganic porous material in a dilute alkali solution with a certain concentration, wherein the mass concentration can be 2-8%, stirring for 2 hours at the temperature of 80 ℃, then washing the inorganic porous material filtered from the alkali leaching solution to be neutral by using deionized water, testing by using a pH test paper, and finally filtering and drying; further washing the inorganic porous material with alkali liquor, thus removing impurities in the inorganic porous material to the maximum extent. The alkali liquor is selected from one of potassium hydroxide, ammonia water and organic amine, and the subsequent modification and loading capacity of the inorganic porous material can be ensured by the treatment in the process.
Adding the compound organic amine into methanol to obtain a compound organic amine ethanol solution, wherein the mass volume concentration of the compound organic amine and the methanol is 20g/L-40g/L, and stirring and mixing to obtain a mixed solution; adding the inorganic porous material into the mixed solution according to the mass volume concentration of 50g/L-150g/L of the inorganic porous material and methanol, continuously stirring at room temperature, removing the solvent by a rotary evaporator, and drying to obtain the carbon dioxide capturing and absorbing ball.
The surface modification of the inorganic porous material is specifically as follows: and (3) placing the three-neck flask in a constant-temperature water bath, installing a reflux device, and placing the constant-temperature water bath on a magnetic stirrer. Adding anhydrous ethanol into a three-neck flask according to the mass volume concentration of the porous material and the anhydrous ethanol of 150mg/mL-180mg/mL, adding the porous material, adding a certain amount of modified surface modifier according to the mass volume concentration of the porous material and the modified surface modifier of 2.5g/mL-5.0g/mL, uniformly stirring, adjusting the temperature to 70 ℃, reacting for 2h, refluxing for 40min at 80 ℃, cooling, performing centrifugal separation, washing the precipitate with the anhydrous ethanol for 2-3 times, and drying in an oven at 110 ℃ for 2h to obtain the surface modified porous material, wherein the adopted modified surface modifier is the composite coupling agent.
The kitchen flue gas CO is2The preparation method of the trapping absorption ball further comprises the following steps of: pouring the composite coupling agent into a stirrer, stirring and mixing uniformly, adding distilled water and absolute ethyl alcohol, and putting the mixture into a microwave chemical device for hydrolysis at 70-85 ℃ to obtain a hydrolyzed composite coupling agent; introducing the hydrolysis composite coupling agent into a three-neck flask in a water bath to heat, heating to 60-80 ℃, adding a modifier accounting for 1-4% of the amount of the composite coupling agent in several times, and stirring for reaction to obtain the hydrolysis composite coupling agent.
The specific preparation method of the modified composite coupling agent comprises the following steps: the preparation method comprises the following steps: pouring 85-91% of silane, 7.2-12.2% of aluminate and 0.18-5.18% of titanate coupling agent into a stirrer, uniformly stirring and mixing, adding distilled water according to the ratio of (V composite coupling agent: V distilled water is 1: 1), adding absolute ethyl alcohol according to the ratio of (V composite coupling agent: V ethyl alcohol is 5: 1), and hydrolyzing in a microwave chemical device at 80 ℃ for 10min to obtain the composite coupling agent; introducing the composite coupling agent into a three-neck flask with water bath heating, heating to 60-80 ℃, adding 1-4% (based on the mass of the composite coupling agent) of modifier for three times, and stirring for reacting for 2 hours to obtain the product.
Further, the modifier is one or more of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid.
The modifier and the composite coupling agent are adopted to treat the inorganic porous material to improve the CO content in the kitchen flue gas2The affinity between the liquid medium and the inorganic porous material is captured, and the inorganic porous material without modification hasThe modified inorganic porous material has a hydrophilic surface, but the affinity with polar organic amine is poor, the modification is carried out on the surface of the inorganic porous material, the modifier can be adopted to combine the advantages of the modifier and the composite coupling agent, the modification effect is improved, the activation degree of the surface of the inorganic porous material can be improved, the reaction of organic amine and the surface of the inorganic porous material is accelerated, and the adsorption, loading and mechanical properties of the organic amine are greatly improved; the type of the surface functional group of the inorganic porous material influences the strength of the surface acting force of the organic surface modifier and the inorganic porous material.
If the organic modifier molecules can perform chemical action (i.e. chemical adsorption) with the surface of the inorganic porous material, the modifier molecules are firmly coated on the surface of the inorganic porous material; if the modifier molecule only acts on the surface of the inorganic porous material by physical adsorption, the acting force is weaker, and the modifier molecule can be desorbed under certain conditions (such as shearing, stirring and motor suction) of the kitchen range hood under the condition that the surface of the inorganic porous material is not firmly coated; therefore, the surface modifier is also selected in consideration of the type of the surface functional group of the inorganic porous material. The acidity and alkalinity of the inorganic porous material also have certain influence on the surface of the inorganic porous material and the action of modifier molecules.
The modifier can improve the activation degree of the surface of the inorganic porous material, accelerate the reaction of organic amine and the surface of the inorganic porous material and greatly improve the adsorption load adsorption and mechanical properties of the organic amine; after the surface of the inorganic porous material is modified by the method, the physical and chemical properties of the surface of the obtained surface-modified inorganic porous material are changed, and the dispersibility and the compatibility of the surface-modified inorganic porous material in organic amine are improved. The invention adopts the composite coupling agent to modify the inorganic porous material to the maximum extent, and more organic amine molecules can be adsorbed and combined.
Further, the inorganic porous material can be one or more than two of diatomite, natural zeolite, medical stone, volcanic rock, corallite, montmorillonite, attapulgite, silicon carbide, molecular sieve and the like, and the particle size is 3-4 mm.
The invention also provides a range hood, which comprises an air duct shell, an air collecting cover and a fan, wherein the air collecting cover is connected to the lower end of the air duct shell, the upper part of the air duct shell is provided with an exhaust fan, the lower part of the air duct shell is provided with a carbon dioxide capturing and absorbing filter box, the carbon dioxide capturing and absorbing filter box is internally provided with a liquid medium for capturing and absorbing the kitchen flue gas CO2 prepared by the method, the air inlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the air collecting cover, and the air outlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the fan.
Further, the carbon dioxide capturing and absorbing filter box comprises a liquid containing groove and a cylindrical baffle plate with one closed end, wherein an air inlet channel and an air outlet channel are formed in the liquid containing groove, the air inlet channel is connected with the air inlet port, the air outlet channel is connected with the air outlet port, and a kitchen flue gas CO2 capturing and absorbing liquid medium prepared by the method is contained in the liquid containing groove.
Further, the carbon dioxide capturing and absorbing filter box comprises a hollow galvanized metal net frame, and kitchen flue gas CO2 capturing and absorbing liquid media with preset thickness prepared by the method are distributed in the hollow galvanized metal net frame. The carbon dioxide capturing and absorbing filter box is placed into a liquid storage tank with a heating device after being absorbed for a certain time, the liquid storage tank is filled with saturated KOH solution, the liquid level is higher than that of the filter box, and CO in the filter box is absorbed under the action of water pressure2Will be removed and react with KOH solution in the liquid storage tank to produce Keokay K2CO3Can be repeatedly put in and adsorb saturated CO2The filter cartridge is then rinsed with clean water and dried for use, and the absorbed CO can be utilized2Formation of K in the above solution2CO3Solution of, K2CO3The solution is an excellent potassium fertilizer and can be used as a fertilizer for green planting of household flowers and green planting of plot parks; can also obtain K industrially2CO3。
Drawings
FIG. 1 is a schematic structural view of the construction of a carbon dioxide capture absorption cartridge filter element of the present invention;
FIG. 2 is a schematic structural view of a range hood of the present invention;
FIG. 3 is a schematic view of another filter cartridge for capturing and absorbing carbon dioxide in accordance with the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a hollow galvanized metal net frame, 2 carbon dioxide capturing and absorbing balls, 3 an air duct, 4a fan, 5 a fan impeller, 6 a carbon dioxide capturing and absorbing filter box, 7 a filter box drawing piece, 8 a filter box mounting opening, 9 a fan impeller, 10 an air inlet channel, 11 and a liquid containing groove. 12. The gas outlet channel 13, the kitchen flue gas CO2 captures the absorption liquid medium 14, the cylindrical baffle.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
Kitchen flue gas CO2The catching absorption liquid medium is composite organic amine compounded by linear organic amine, annular organic amine and steric hindrance amine, wherein 270Ml of Ethanolamine (MEA), 135ml of Diethanolamine (DEA), 45ml of N-methyl glycol amine (MDEA) and 50ml of cyclic amine Piperazine (PZ) are stirred and mixed uniformly to obtain a solution with the concentration of the composite organic amine being 50%. The kitchen flue gas CO2 captures the absorption liquid medium.
Example 2
Kitchen flue gas CO2The preparation method of the liquid capturing and absorbing medium comprises the steps of 1) pretreating an inorganic porous material, placing zeolite with the particle size of 2-3mm in a dilute sulfuric acid solution with the concentration of 2%, stirring for 1.5h at the temperature of 60 ℃, washing with deionized water to be neutral, and testing with a PH test paper; placing the pretreated zeolite in 5% potassium hydroxide solution, stirring at 80 deg.C for 2 hr, washing the zeolite filtered from 5% potassium hydroxide immersion liquid with deionized water to neutrality, testing with pH test paper, filtering, and drying;
step 2) preparing a surface function modifier, namely a composite coupling agent, pouring 100g of silane coupling agent kh-570, 80g of aluminate coupling agent 411-A and 20g of titanate coupling agent JN-9 into a beaker, adding 1000mL of distilled water and 200mL of absolute ethyl alcohol, and placing the beaker in a microwave device for hydrolysis at 80 ℃ for 10min to obtain a compound coupling agent; introducing the composite coupling agent into a three-neck flask with water bath heating, heating to 70 ℃, adding 1% (based on the amount of the composite coupling agent) of stearic acid for three times, and stirring for reacting for 2 hours to obtain a stearic acid modified surface modifier;
step 3) surface modification of the inorganic porous material, namely placing the three-neck flask in a constant-temperature water bath, installing a reflux device, and placing the constant-temperature water bath on a magnetic stirrer; adding 600mL of absolute ethyl alcohol into a three-neck flask, adding 100g of natural zeolite, adding 20mL of the modified surface function modifier prepared in the step 2), uniformly stirring, adjusting the temperature to 70 ℃ for reaction for 2h, refluxing at 80 ℃ for 40min, cooling, performing centrifugal separation, washing the precipitate with absolute ethyl alcohol for 2-3 times, and drying in an oven at 110 ℃ for 2h to obtain surface modified natural zeolite;
step 4) preparation of the compound organic amine modified natural zeolite: 30g of the compound organic amine prepared in example 1 is added into 1000mL of methanol, stirred for 15min, then 100g of the surface modified natural zeolite is added, the mixture is continuously stirred for 30min at room temperature, finally the solvent is removed by a rotary evaporator at 70 ℃, and the natural zeolite carbon dioxide trapping sphere is obtained after drying.
Example 3
Kitchen flue gas CO2The catching and absorbing liquid medium is composite organic amine compounded by linear organic amine, cyclic organic amine and steric hindrance amine, wherein 216ml of triethylene tetramine (TETA), 108ml of Diethanolamine (DEA), 36ml of 3-dimethylamino-1-propylamine DMAPA and 40ml of 3-piperidinepropylamine 3PDPA are stirred and mixed uniformly. The kitchen flue gas CO2 captures and absorbs the liquid medium, and the compound organic amine is prepared into a solution with the compound organic amine concentration of 40%.
Example 4
Kitchen flue gas CO2The preparation method of the capturing and absorbing liquid medium comprises the steps of 1) pretreating an inorganic porous material, placing volcanic rock with the particle size of 3-4mm in a dilute hydrochloric acid solution with the concentration of 5%, stirring for 1.5h at the temperature of 60 ℃, washing with deionized water to be neutral, and testing with a PH test paper; placing pretreated volcanic rock in 20% ammonia water solution, stirring at 80 deg.C for 2 hr, washing volcanic rock filtered from 20% ammonia water immersion liquid with deionized water to neutrality, testing with pH test paper, filtering, and dryingDrying;
step 2) preparing a surface function modifier, namely a composite coupling agent, pouring 85g of silane coupling agent kh-560, 12.2g of aluminate coupling agent L-1A and 2.18g of titanate coupling agent Y8-203 into a beaker, adding 1000mL of distilled water and 200mL of absolute ethyl alcohol, placing the beaker in a microwave device, and hydrolyzing the beaker at 80 ℃ for 10min to obtain a compound coupling agent; introducing the composite coupling agent into a three-neck flask with water bath heating, heating to 75 ℃, adding 3% (based on the amount of the composite coupling agent) of lauric acid for three times, and stirring for reacting for 2 hours to obtain a lauric acid modified surface modifier;
and 3) surface modification of the inorganic porous material, namely placing the three-neck flask in a constant-temperature water bath, installing a reflux device, and placing the constant-temperature water bath on a magnetic stirrer. Adding 1000mL of absolute ethyl alcohol into a three-neck flask, adding 170g of volcanic particles, adding 72mL of the modified surface function modifier prepared in the step (2), uniformly stirring, adjusting the temperature to 70 ℃, reacting for 2h, refluxing at 80 ℃ for 40min, cooling, performing centrifugal separation, washing the precipitate with absolute ethyl alcohol for 2-3 times, and drying in an oven at 110 ℃ for 2h to obtain surface modified volcanic;
step 4) preparation of the compound organic amine modified natural zeolite: 20g of the compound organic amine prepared in example 3 was added to 1000mL of methanol, stirred for 15min, 50g of the surface-modified volcanic rock was added thereto, the mixture was stirred at room temperature for 30min, and finally the solvent was removed by a rotary evaporator at 70 ℃, and the volcanic carbon dioxide capture absorption spheres were obtained after drying.
Example 5
Kitchen flue gas CO2The catching absorption liquid medium is compound organic amine compounded by linear chain organic amine, cyclic organic amine and steric hindrance amine, wherein, 248.4ml of ethylenediamine, 85.6ml of N-methylethanolamine, 80ml of N, N-Dimethylethanolamine (DEEA) and 36ml of AMP 2-amino-2-methyl-1-propanolamine are stirred and mixed evenly. The kitchen flue gas CO2 captures and absorbs the liquid medium, and the compound organic amine is prepared into a solution with the compound organic amine concentration of 45%.
Example 6
Kitchen flue gas CO2The preparation method of the liquid capturing and absorbing medium comprises the step 1) of preparing the inorganic porous materialThe pretreatment of (1), putting the 4A molecular sieve into a dilute nitric acid solution with the concentration of 4%, stirring for 1.5h at the temperature of 60 ℃, washing to be neutral by using deionized water, and testing by using a PH test paper; placing the pretreated 4A molecular sieve in 25% ethylenediamine solution, stirring at 80 deg.C for 2h, washing the 4A molecular sieve filtered from 25% ethylenediamine immersion liquid with deionized water to neutrality, testing with pH test paper, filtering, and drying;
step 2) preparing a surface function modifier, namely a composite coupling agent, pouring 87g of silane coupling agent kh-550, 8.0g of aluminate coupling agent L-1B and 5.0g of titanate coupling agent T1-1 into a beaker, adding 1000mL of distilled water and 200mL of absolute ethyl alcohol, and placing the beaker in a microwave device for hydrolysis at 80 ℃ for 10min to obtain a compound coupling agent; introducing the composite coupling agent into a three-neck flask with water bath heating, heating to 75 ℃, adding 4% (based on the amount of the composite coupling agent) of decanoic acid for three times, and stirring for reacting for 2 hours to obtain a decanoic acid modified surface modifier;
and 3) surface modification of the inorganic porous material, namely placing the three-neck flask in a constant-temperature water bath, installing a reflux device, and placing the constant-temperature water bath on a magnetic stirrer. Adding 1000mL of absolute ethyl alcohol into a three-neck flask, adding 160g of 4A molecular sieve, adding 50mL of the modified surface function modifier prepared in the step (2), uniformly stirring, adjusting the temperature to 70 ℃, reacting for 2h, refluxing at 80 ℃ for 40min, cooling, performing centrifugal separation, washing the precipitate with absolute ethyl alcohol for 2-3 times, and drying in an oven at 110 ℃ for 2h to obtain the surface modified 4A molecular sieve;
step 4) preparation of the compound organic amine modified natural zeolite: 40g of the composite organic amine of the embodiment 5 is added into 1000mL of methanol, stirred for 15min, then 120g of the decanoic acid modified surface modified 4A molecular sieve is added, the mixture is continuously stirred for 30min at room temperature, finally a rotary evaporator is used for removing the solvent at 70 ℃, and the carbon dioxide capture absorption ball of the 4A molecular sieve is obtained after drying.
Example 7
Kitchen flue gas CO2Catching and absorbing liquid medium, compound organic amine compounded by straight-chain organic amine, cyclic organic amine and steric hindrance amine, wherein, Diethylenetriamine (DETA)259.2ml, Diethanolamine (DEA)86.4ml, N,86.4ml of N-Dimethylethanolamine (DEEA) and 48ml of AMP 2-amino-2-methyl-1-propanolamine were mixed well with stirring. The kitchen flue gas CO2 captures and absorbs the liquid medium, and the compound organic amine is prepared into a solution with the compound organic amine concentration of 48 percent.
Example 8
Kitchen flue gas CO2The preparation method of the catching and absorbing liquid medium comprises the steps of 1) pretreating the inorganic porous material, placing a corallite sieve with the diameter of 3-4mm into a dilute hydrochloric acid solution with the concentration of 3%, stirring for 1.5h at the temperature of 60 ℃, washing with deionized water to be neutral, and testing with a pH test paper; placing the pretreated corallite sieve in 4% potassium hydroxide solution, stirring at 80 deg.C for 2 hr, washing the corallite filtered from the potassium hydroxide extract with deionized water to neutrality, testing with pH test paper, filtering, and drying;
step 2) preparing a surface function modifier, namely a composite coupling agent, pouring 88g of silane coupling agent kh-590, 9.5g of aluminate coupling agent H2-2 and 2.5g of titanate coupling agent T1-2 into a beaker, adding 1000mL of distilled water and 200mL of absolute ethyl alcohol, placing the beaker in a microwave device, and hydrolyzing the beaker at 80 ℃ for 10min to obtain a compound coupling agent; introducing the composite coupling agent into a three-neck flask with water bath heating, heating to 75 ℃, adding 4 percent (based on the amount of the composite coupling agent) of stearic acid for three times, and stirring for reacting for 2 hours to obtain a stearic acid modified surface modifier;
and 3) surface modification of the inorganic porous material, namely placing the three-neck flask in a constant-temperature water bath, installing a reflux device, and placing the constant-temperature water bath on a magnetic stirrer. Adding 1000mL of absolute ethyl alcohol into a three-neck flask, adding 180g of corallite, adding 60mL of the modified surface function modifier prepared in the step (2), uniformly stirring, adjusting the temperature to 70 ℃ for reaction for 2h, refluxing at 80 ℃ for 40min, cooling, performing centrifugal separation, washing the precipitate with absolute ethyl alcohol for 2-3 times, and drying in an oven at 110 ℃ for 2h to obtain surface-modified corallite;
step 4) preparation of the compound organic amine modified natural zeolite: adding 25g of the compound organic amine of example 7 into 1000mL of methanol, stirring for 15min, adding 90g of the corallite with the modified surface, stirring the mixture at room temperature for 30min, removing the solvent by using a rotary evaporator at 70 ℃, and drying to obtain the corallite carbon dioxide capturing absorption ball.
As shown in the figures, according to the range hood of the embodiment of the invention, an air duct shell 5, an air collecting cover and a fan 4 are arranged, an air duct 3 is arranged in the air duct shell 5, the air collecting cover is connected to the lower end of the air duct shell 5, the fan 5 is arranged at the upper part of the air duct shell 5, a carbon dioxide capturing and absorbing filter box 6 is arranged at the lower part of the air duct shell 5, kitchen flue gas CO2 capturing and absorbing liquid medium 13 is contained in the carbon dioxide capturing and absorbing filter box, an air inlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the air collecting cover, and an air outlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the fan.
The carbon dioxide capturing and absorbing filter cartridge prepared by using the carbon dioxide capturing and absorbing liquid medium prepared in the embodiments 1, 3, 5 and 7 comprises a liquid containing tank 11 and a cylindrical baffle plate 14 which is formed in the liquid containing tank and has a closed end and an air inlet channel 10 and an air outlet channel 12, wherein the air inlet channel 10 is connected with an air inlet port, the air outlet channel 12 is connected with the air outlet port, and the liquid containing tank contains the solution with the concentration of 50% of the compound organic amine prepared in the embodiment 1.
In another embodiment, a carbon dioxide capturing and absorbing filter box 6 is provided, a filter box drawer 7 can be arranged at the outer end of the filter box, a filter box mounting opening 8 is arranged at the lower part of the air duct shell 5, and the filter box mounting opening comprises a hollow galvanized metal net frame 1, and kitchen flue gas CO2 capturing and absorbing balls 2 of embodiments 2, 4, 6 and 8 with preset thickness are distributed in the hollow galvanized metal net frame.
The carbon dioxide capturing and absorbing filter box is arranged in the air duct shell below the fan of the traditional range hood, the power of the traditional motor only needs to be increased, the factors of energy conservation and noise are fully considered, the power of the traditional motor is increased, the obstruction to smoke and the reduction of smoke exhaust efficiency caused by the arrangement of the carbon dioxide capturing filter box (a capturing ball and a liquid capturing agent) are considered, and the power of the traditional motor is increased through calculation, so that the smoke exhaust efficiency and the smoke exhaust effect can be completely ensured.
The carbon dioxide capturing and absorbing filter cartridge made of the carbon dioxide capturing and absorbing liquid medium or the balls according to the embodiments 1 to 8 is installed in the air duct housing below the fan of the conventional range hood to perform the performance of capturing and absorbing carbon dioxide.
TABLE 1 CO Capture of carbon dioxide absorbing pellets2Trapping Performance
Figure BDA0003214033910000131
Figure BDA0003214033910000141
TABLE 2 CO Capture of absorption liquid Medium for carbon dioxide2Trapping Performance
Figure BDA0003214033910000142
TABLE 3 carbon dioxide Capture absorption sphere CO2Trapping Performance
Figure BDA0003214033910000143
[ remarks for]1、CO2The size of the filter box is 20.7cm multiplied by 18.5cm multiplied by 40cm
2.1 cubic meter of natural gas produces 1964.28g of CO2
1000L÷22.4L/mol＝44.64mol,44.64mol×44g/mol＝1964.28g
TABLE 4 carbon dioxide capture absorption liquid medium CO2Trapping Performance
Figure BDA0003214033910000151
[ remarks for]1、CO2The size of the filter box is 20.7cm multiplied by 18.5cm multiplied by 40cm
2.1 cubic meter of natural gas produces 1964.28g of CO2
1000L÷22.4L/mol＝44.64mol，44.64mol×44g/mol＝1964.28g
The carbon dioxide capturing and absorbing filter box which is saturated in capturing and adsorbing is arrangedIn a liquid storage tank with a heating device, saturated KOH solution is filled in the liquid storage tank, the liquid level is higher than that of the filter cartridge, and CO in the filter cartridge is filtered under the action of water pressure2Will be removed and react with KOH solution in the liquid storage tank to produce Keokay K2CO3Can be repeatedly put in and adsorb saturated CO2The filter cartridge is then rinsed with clear water and dried for use, K2CO3The solution is an excellent potassium fertilizer and can be used as a fertilizer for green planting of household flowers and green planting of plot parks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. Kitchen flue gas CO2The trapping and absorbing liquid medium is composite organic amine which is formed by compounding a straight-chain organic amine solution and a cyclic organic amine solution, wherein the mass ratio of m (the straight-chain organic amine solution) to m (the cyclic organic amine solution) is 6-8:1-3, and the mass volume concentration of the mixed organic amine is 40-50%.
2. Kitchen fumes CO according to claim 12The catching and absorbing liquid medium is characterized in that the linear-chain organic amine consists of primary amine, secondary amine and tertiary amine, wherein the mass ratio of the primary amine to the secondary amine to the tertiary amine is m (the primary amine organic amine) to m (the secondary amine organic amine) to m (the tertiary amine) is 5-7: 2-3: 1-2.
3. Kitchen fumes CO according to claim 22A trapping and absorbing liquid medium, characterized in that the primary amine is: one or more of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine, methylamine, ethylenediamine and ethanolamine;
the secondary amine is one or more of diisopropylamine, diethanolamine, N-methylethanolamine and N-ethylethanolamine;
the secondary amine is tertiary amine and mainly comprises: one or more of triethanolamine, N-dimethylformamide, N-diethylethanolamine, N-dimethylethanolamine and N-methylethanediol amine;
the cyclic organic amine is one or more of cyclic piperazine, 3-piperidine propylamine, 3-dimethylamino-1-propylamine, 3-diethylamino-1-propylamine, AMP 2-amino-2-methyl-1-propanolamine, 2-amino-2-ethyl-1, 3-propanediol and 2-amino (methyl) -1, 3-propanediol (AHMPD).
4. Kitchen flue gas CO2The capture absorption ball is characterized in that the kitchen flue gas CO of claim 1 is used2The capture and absorption liquid medium is loaded on the inorganic porous material.
5. Kitchen flue gas CO2The preparation method of the catching absorption ball comprises the steps of (1) carrying out acid and alkali cleaning and impurity removal on an inorganic porous material and carrying out surface modification, wherein a surface modification agent used for the surface modification is a composite coupling agent, the composite coupling agent comprises 85-91% of a silane coupling agent, 7.2-12.2% of an aluminate coupling agent and 0.18-5.18% of a titanate coupling agent in mass ratio,
step (2) adding the compound organic amine of claims 1 to 3 into methanol to obtain a compound organic amine ethanol solution, wherein the mass volume concentration of the compound organic amine and the methanol is 20g/L-40g/L, and stirring and mixing to obtain a mixed solution; adding the inorganic porous material into the mixed solution according to the mass volume concentration of 50g/L-150g/L of the inorganic porous material and methanol, continuously stirring at room temperature, removing the solvent by a rotary evaporator, and drying to obtain the carbon dioxide capturing and absorbing ball.
6. Kitchen fumes CO according to claim 52The preparation method of the trapping absorption ball is characterized in that the composite coupling agent is a modified composite coupling agent, and the preparation method specifically comprises the following steps: pouring the composite coupling agent into a stirrer, stirring and mixing uniformly, adding distilled water and absolute ethyl alcohol, and putting the mixture into a microwave chemical device for hydrolysis at 70-85 ℃ to obtain a hydrolyzed composite coupling agent; compounding the hydrolysisIntroducing the coupling agent into a three-neck flask in a water bath, heating to 60-80 ℃, adding the modifier with the total amount of 1-4% of the amount of the composite coupling agent in several times, and stirring for reaction.
7. Kitchen fumes CO according to claim 62The preparation method of the catching absorption ball is characterized in that the modifier is one or more of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid and stearic acid; the inorganic porous material can be one or more of diatomite, natural zeolite, medical stone, volcanic rock, corallite, montmorillonite, attapulgite, silicon carbide, molecular sieve, etc., and has a particle size of 3-4 mm.
8. The utility model provides a smoke ventilator, wind channel shell, air-collecting cover and fan, the air-collecting cover is connected wind channel shell lower extreme, wind channel shell upper portion is equipped with the air exhauster. Characterized in that a carbon dioxide capturing and absorbing filter box is arranged at the lower part of the air duct shell, and the kitchen flue gas CO according to any one of claims 1 to 3 is contained in the carbon dioxide capturing and absorbing filter box2Catching and absorbing liquid medium, or preparing kitchen fume CO by the method of claim 4 and claims 5-72And the air inlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the air collecting cover, and the air outlet port of the carbon dioxide capturing and absorbing filter box corresponds to one side of the fan.
9. The range hood of claim 8, wherein the carbon dioxide capturing and absorbing filter box comprises a liquid containing tank and a cylindrical baffle plate with a closed end, wherein an air inlet channel and an air outlet channel are formed in the liquid containing tank, the air inlet channel is connected with the air inlet port, the air outlet channel is connected with the air outlet port, and the liquid containing tank contains the kitchen flue gas CO according to claims 1 to 32Capturing the absorbing liquid medium.
10. The range hood of claim 8, wherein the carbon dioxide capture absorption filter cartridge comprises a hollow galvanized metal frame, and the carbon dioxide capture absorption filter cartridge comprises a hollow galvanized metal frameThe kitchen flue gas CO of any one of claims 4 to 7 with a predetermined thickness is arranged in the hollow galvanized metal mesh frame2Capturing the absorption balls.
CN202110938214.3A 2021-08-16 2021-08-16 Kitchen flue gas CO2Catch and absorb liquid medium/ball and have its smoke ventilator Pending CN113648789A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115069232A (en) * 2022-07-06 2022-09-20 湘潭大学 Desorption of CO in organic amine catalyzed by metal modified attapulgite catalyst 2 In (1)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115069232A (en) * 2022-07-06 2022-09-20 湘潭大学 Desorption of CO in organic amine catalyzed by metal modified attapulgite catalyst 2 In (1)

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