MD320Z - Installation for the regeneration of cartridge with activated carbon or mineral sorbents used for purification of water from organic compounds - Google Patents

Installation for the regeneration of cartridge with activated carbon or mineral sorbents used for purification of water from organic compounds Download PDF

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Publication number
MD320Z
MD320Z MDS20100095A MDS20100095A MD320Z MD 320 Z MD320 Z MD 320Z MD S20100095 A MDS20100095 A MD S20100095A MD S20100095 A MDS20100095 A MD S20100095A MD 320 Z MD320 Z MD 320Z
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Moldova
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regeneration
cartridge
activated carbon
installation
organic compounds
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MDS20100095A
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Romanian (ro)
Russian (ru)
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Ольга КОВАЛЁВА
Георге ДУКА
Виктор КОВАЛЁВ
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Государственный Университет Молд0
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Priority to MDS20100095A priority Critical patent/MD320Z/en
Publication of MD320Y publication Critical patent/MD320Y/en
Publication of MD320Z publication Critical patent/MD320Z/en

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Abstract

The invention relates to installations for the regeneration of cartridge with activated carbon or mineral sorbents used for purification of water from organic compounds.According to the invention, the installation consists of a cylindrical body (1) with a semicircular bottom (2), connected to a branch pipe (17) for feeding the regenerating fluid, at the same time the body is equipped with a removable lid (6) with a branch pipe (7) for removal of air, from the inside of the lid (6) is fixed a quartz tube (8) with a source of ultraviolet radiation (9), and from the inside of the body is installed a reflector (12), the body (1) by means of a diverting branch pipe (13) is connected to a capacity (14) for regenerating solution, equipped with a dispenser (15) for Fenton reagent and connected by means of a peristaltic pump (16) to the branch pipe (17) for feeding the regenerating fluid, and to the latter is also attached an air delivery device (18), to the bottom of the body is installed an ultrasonic generator (3), at the same time between the generator (3) and the quartz tube (8) are made brackets (4) for the cartridge (5) subjected to regeneration.

Description

Invenţia se referă la instalaţiile pentru regenerarea cartuşului cu cărbune activ sau cu absorbanţi minerali, utilizat pentru epurarea apei de compuşi organici. The invention relates to installations for regenerating the cartridge with activated carbon or mineral absorbents, used for purifying water from organic compounds.

Este cunoscută instalaţia pentru regenerarea cartuşului cu cărbune activ, care include o capacitate pentru tratarea chimică a cărbunelui activ cu o soluţie încălzită de hidroxid de sodiu cu calcinarea ulterioară a cărbunelui activ la o temperatură de 700…750°C în lipsa aerului [1]. The installation for regeneration of the activated carbon cartridge is known, which includes a capacity for chemical treatment of the activated carbon with a heated solution of sodium hydroxide with subsequent calcination of the activated carbon at a temperature of 700…750°C in the absence of air [1].

Dezavantajul acestei instalaţii constă în aceea că cartuşul cu cărbune activ utilizat se consumă datorită adsorbţiei pe suprafaţa microporilor a substanţelor organice, care sunt parţial spălate în soluţie alcalină, apoi, la o temperatură ridicată, sunt supuse distrugerii termice. Procedeul realizat în instalaţia menţionată este legat de un consum mare de energie, datorită cărui fapt este ineficient. The disadvantage of this installation is that the activated carbon cartridge used is consumed due to the adsorption on the surface of the micropores of organic substances, which are partially washed in alkaline solution, then, at a high temperature, are subjected to thermal destruction. The process carried out in the mentioned installation is related to a high energy consumption, due to which it is inefficient.

În calitate de cea mai apropiată soluţie este instalaţia pentru regenerarea cartuşului cu cărbune activ utilizat pentru epurarea apei în condiţii casnice, care constă dintr-un corp cilindric cu racord de debitare şi evacuare a soluţiei apoase şi a reactivilor, capac detaşabil, de care este fixată o sursă de radiaţie ultravioletă cu reflector, amplasat în interiorul corpului, un rezervor intermediar şi o pompă cu racorduri dotate cu supape [2]. As the closest solution is the installation for regenerating the activated carbon cartridge used for water purification in domestic conditions, which consists of a cylindrical body with a connection for dispensing and discharging the aqueous solution and reagents, a removable cover, to which is attached an ultraviolet radiation source with a reflector, located inside the body, an intermediate tank and a pump with connections equipped with valves [2].

Dezavantajul acestei instalaţii constă în aceea că instalaţia menţionată nu asigură posibilitatea de regenerare a cărbunelui activat în cartuşe standard, ceea ce conduce la un consum sporit de reactivi. The disadvantage of this installation is that the mentioned installation does not provide the possibility of regenerating activated carbon in standard cartridges, which leads to increased consumption of reagents.

Problema tehnică pe care o rezolvă această invenţie constă în simplificarea construcţiei şi sporirea eficacităţii procesului de regenerare a cartuşului standard cu cărbune activ, utilizat pentru epurarea apei de compuşi organici. The technical problem solved by this invention consists in simplifying the construction and increasing the efficiency of the regeneration process of the standard activated carbon cartridge, used for purifying water from organic compounds.

Conform invenţiei, instalaţia constă dintr-un corp cilindric cu fund semisferic unit cu un racord de debitare a soluţiei de regenerare, totodată corpul este dotat cu un capac detaşabil cu un racord pentru evacuarea aerului, de partea internă a capacului este fixat un tub din cuarţ cu o sursă de radiaţie ultravioletă, iar pe peretele intern al corpului este amplasat un reflector, corpul prin intermediul unui racord de evacuare este unit cu o capacitate pentru soluţia de regenerare, dotată cu un dozator pentru reactivul Fenton şi unită prin intermediul unei pompe peristaltice cu racordul de debitare a soluţiei de regenerare, iar la ultimul este unit şi un dispozitiv de debitare a aerului, pe fundul corpului este amplasat un generator de ultrasunet, totodată între generator şi tubul de cuarţ sunt executate suporturi pentru cartuşul supus regenerării. According to the invention, the installation consists of a cylindrical body with a hemispherical bottom connected to a connection for dispensing the regeneration solution, at the same time the body is equipped with a removable cover with a connection for air evacuation, a quartz tube with an ultraviolet radiation source is fixed to the inner side of the cover, and a reflector is placed on the inner wall of the body, the body is connected by means of an evacuation connection to a capacity for the regeneration solution, equipped with a dispenser for the Fenton reagent and connected by means of a peristaltic pump to the connection for dispensing the regeneration solution, and an air evacuation device is also connected to the latter, an ultrasound generator is placed on the bottom of the body, at the same time supports for the cartridge subject to regeneration are made between the generator and the quartz tube.

În calitate de soluţie regenerantă poate fi utilizată soluţia de peroxid de hidrogen de 1…3% cu un conţinut redus de compuşi de fier, în special, de oxalat de fier în cantitate de 0,005…0,01 g/L, apă distilată sau demineralizată, care este cunoscut ca reactivul Fenton, având proprietăţi fotocatalitice. As a regenerating solution, a 1…3% hydrogen peroxide solution with a low content of iron compounds, in particular, iron oxalate in an amount of 0.005…0.01 g/L, distilled or demineralized water, which is known as Fenton's reagent, having photocatalytic properties, can be used.

Rezultatul tehnic constă în obţinerea simplificării construcţiei şi sporirea eficacităţii procesului de regenerare a cartuşului standard cu cărbune activ, epurarea apei de compuşi organici, datorită influenţei ultrasunetului asupra apei reciclate şi datorită faptului că pe suprafaţa microporilor de cărbune activ apar fluxuri hidrodinamice, însoţite de fenomene de cavitaţie viguroase cu apariţia microbulelor, spargerea cărora duce la o cădere de presiune în microvolume, care cauzează o mulţime de efecte care influenţează benefic asupra leşierii şi degradării oxidative a substanţelor organice în microporii de cărbune activ aflat în cartuş. Barbotarea aerului contribuie la fluidizarea cărbunelui activ din cartuş şi la îmbunătăţirea proceselor de transfer de masă, de asemenea este un furnizor de oxigen din aer ca oxidant al materiei organice. Ca urmare a acţiunii ultrasunetului în lichid apar, de asemenea, o serie de efecte secundare, dintre care o importanţă mare o au fluxurile acustice, presiunea radiaţiei şi cavitaţia, care în procesele de prelucrare a lichidului asigură o eficienţă sporită în distrugerea compuşilor organici, ca urmare a suprapunerii frecvenţelor oscilaţiilor naturale ale moleculelor în apă şi a vibraţiilor forţate cu ultrasunete. Este considerată optimă puterea acustică specifică cu frecvenţa de oscilaţie de 20…40 kHz, intensitatea de 1…3 W/cm3 care asigură difuzarea presiunii acustice ridicate la o distanţă de 7…8 cm de la sursa de radiaţie, în care acest proces este deosebit de intens. Odată cu creşterea frecvenţei oscilaţiilor banda de înaltă presiune se extinde la 10…15 cm, dar intensitatea scade ca urmare a unei amplitudini mai mici. Soluţia apoasă cu resturi de substanţe organice este emisă în zona de radiaţii ultraviolete, unde începe un proces fotocatalitic distructiv omogen. În aceste condiţii, în prezenţa reactivului Fenton (UV/Fe(II)/H2O2) şi a oxigenului dizolvat se formează o serie de radicali activi, printre care ·OH, care ulterior duc la generarea radicalului superoxid-anionului (·O2 -), radicalului dioxid de hidrogen, sau radicalului hidroperoxil (·HO2), radicalului ·HO2 -, precum şi la formarea de H2O2. The technical result consists in achieving simplification of the construction and increasing the effectiveness of the regeneration process of the standard activated carbon cartridge, water purification from organic compounds, due to the influence of ultrasound on the recycled water and due to the fact that hydrodynamic flows appear on the surface of the activated carbon micropores, accompanied by vigorous cavitation phenomena with the appearance of microbubbles, the bursting of which leads to a pressure drop in microvolumes, which causes a number of effects that beneficially influence the leaching and oxidative degradation of organic substances in the activated carbon micropores located in the cartridge. Air bubbling contributes to the fluidization of the activated carbon in the cartridge and to the improvement of mass transfer processes, it is also a supplier of oxygen from the air as an oxidant of organic matter. As a result of the action of ultrasound in the liquid, a number of side effects also appear, of which acoustic flows, radiation pressure and cavitation are of great importance, which in the processes of liquid processing ensure increased efficiency in the destruction of organic compounds, as a result of the overlap of the frequencies of natural oscillations of molecules in water and forced vibrations with ultrasound. The optimal specific acoustic power with an oscillation frequency of 20…40 kHz, intensity of 1…3 W/cm3 is considered optimal, which ensures the diffusion of high acoustic pressure at a distance of 7…8 cm from the radiation source, where this process is particularly intense. With increasing oscillation frequency, the high-pressure band expands to 10…15 cm, but the intensity decreases due to a smaller amplitude. The aqueous solution with residues of organic substances is emitted into the ultraviolet radiation zone, where a homogeneous destructive photocatalytic process begins. Under these conditions, in the presence of Fenton's reagent (UV/Fe(II)/H2O2) and dissolved oxygen, a series of active radicals are formed, including ·OH, which subsequently lead to the generation of the superoxide anion radical (·O2 -), the hydrogen dioxide radical, or the hydroperoxyl radical (·HO2), the ·HO2 - radical, as well as to the formation of H2O2.

În calitate de compuşi de fier în reactivul Fenton pot fi folosite diferite săruri, dar proprietatea de bază a dioxalatoferatului(II) de potasiu conform formulei K2[Fe(C2O4)2] este fotosensibilizarea sa, astfel încât sub acţiunea fotoiradierii are loc un proces redox molecular intern, care duce la oxidarea fierului(II) până la fier(III) şi oxidarea ionilor de oxalat C2O4 2- până la CO2. Ionii de Fe(III) hidrolizează rapid şi la iradierea cu raze ultrafiolete duc la oxidarea compuşilor organici în soluţie. Agentul responsabil pentru această reacţie este radicalul de hidroxil, format la fotodisocierea de Fe(OH)2+: Various salts can be used as iron compounds in Fenton's reagent, but the basic property of potassium dioxalatoferrate(II) according to the formula K2[Fe(C2O4)2] is its photosensitization, so that under the action of photoirradiation an internal molecular redox process takes place, which leads to the oxidation of iron(II) to iron(III) and the oxidation of oxalate ions C2O4 2- to CO2. Fe(III) ions hydrolyze rapidly and upon irradiation with ultraviolet rays lead to the oxidation of organic compounds in solution. The agent responsible for this reaction is the hydroxyl radical, formed upon photodissociation of Fe(OH)2+:

. .

Radicalul ·OH posedă valori mari ale energiei negative libere (263 kJ/mol), drept urmare, se manifestă termodinamic proprietăţi de oxidare faţă de substanţele organice, oxidând moleculele conform mecanismului de disociere a atomului de hidrogen cu formarea unei molecule de apă în urma reacţiei în forma generală: RH + ·OH → ·R + H2O. The ·OH radical possesses high values of negative free energy (263 kJ/mol), as a result, it thermodynamically manifests oxidation properties towards organic substances, oxidizing molecules according to the mechanism of dissociation of the hydrogen atom with the formation of a water molecule following the reaction in the general form: RH + ·OH → ·R + H2O.

Radicalul ·O2 - are o reactivitate bună ca oxidant şi ca agent de reducere, astfel încât uşor recuperează compuşii organici care au proprietăţi de acceptor. Rezultatul unor astfel de prelucrări cu ultrasunet şi fotocatalitice a soluţiei regenerante apoase ce conţine compuşi organici care pot fi spălaţi este distrugerea lor aproape totală până la compuşi anorganici neutri cu formarea dioxidului de carbon şi a apei: ·OH + O2 + CnOmH(2n-2m+2) → nCO2 + (n-m +1) H2O. The radical ·O2 - has good reactivity as an oxidant and as a reducing agent, so it easily recovers organic compounds that have acceptor properties. The result of such ultrasonic and photocatalytic treatments of the aqueous regenerating solution containing washable organic compounds is their almost complete destruction to neutral inorganic compounds with the formation of carbon dioxide and water: ·OH + O2 + CnOmH(2n-2m+2) → nCO2 + (n-m +1) H2O.

În figură este prezentată schema instalaţiei revendicate. The figure shows the diagram of the claimed installation.

Instalaţia conţine corpul cilindric 1 cu fund semisferic 2 unit cu racordul 17 de debitare a soluţiei de regenerare, totodată corpul este dotat cu capac 6 detaşabil cu racord 7 pentru evacuarea aerului, de partea internă a capacului 6 este fixat tubul 8 din cuarţ cu o sursă de radiaţie ultravioletă 9, care are în partea de jos o suprafaţă de contact 10, conectat printr-un invertor 11 la o sursă de curent, iar pe peretele intern al corpului este amplasat reflectorul 12. Corpul 1 prin intermediul racordului 13 de evacuare este unit cu capacitatea 14 pentru soluţia de regenerare. Totodată capacitatea 14 pentru soluţia de regenerare este dotată cu un dozator 15 pentru reactivul Fenton şi unită prin intermediul pompei peristaltice 16 cu racordul 17 de debitare a soluţiei de regenerare, iar la ultimul este unit şi dispozitivul 18 de debitare a aerului, pe fundul corpului este amplasat generatorul 3 de ultrasunet, totodată între generator 3 şi tubul de cuarţ 8 sunt executate suporturi 4 pentru cartuşul 5 supus regenerării. The installation contains a cylindrical body 1 with a hemispherical bottom 2 connected to the connection 17 for dispensing the regeneration solution, at the same time the body is equipped with a removable cover 6 with a connection 7 for air evacuation, on the inner side of the cover 6 is fixed the quartz tube 8 with an ultraviolet radiation source 9, which has a contact surface 10 at the bottom, connected by an inverter 11 to a current source, and on the inner wall of the body the reflector 12 is placed. The body 1 is connected by means of the discharge connection 13 to the capacity 14 for the regeneration solution. At the same time, the capacity 14 for the regeneration solution is equipped with a dispenser 15 for the Fenton reagent and connected by means of the peristaltic pump 16 to the connection 17 for dispensing the regeneration solution, and to the latter is also connected the air dispensing device 18, on the bottom of the body the ultrasound generator 3 is located, at the same time, between the generator 3 and the quartz tube 8, supports 4 for the cartridge 5 subject to regeneration are made.

Pentru regenerarea cărbunelui activ poate fi utilizat setul standard de cartuşe de la diverşi producători, de exemplu, BRITA, produse în Rusia etc., utilizate pentru epurarea apei de compuşi organici. În calitate de sursă de radiaţie ultravioletă poate fi utilizată lampa de tip DRT-240, având lungimea de undă în diapazonul 180…400 nm cu o doză de radiaţie de 10…20 mJ/cm2. În calitate de generator de ultrasunete poate fi utilizat oricare dispozitiv care generează ultrasunet. For regeneration of activated carbon, a standard set of cartridges from various manufacturers, for example, BRITA, produced in Russia, etc., used for water purification from organic compounds, can be used. As a source of ultraviolet radiation, a DRT-240 type lamp can be used, having a wavelength in the range of 180…400 nm with a radiation dose of 10…20 mJ/cm2. As an ultrasound generator, any device that generates ultrasound can be used.

Instalaţia funcţionează în modul următor. The installation operates in the following way.

Soluţia pentru regenerare se prepară în apă distilată cu conţinut redus de minerale, care include, de exemplu, 1…3% peroxid de hidrogen, 0,005…0,01 g/L de oxalat de fier (III) în cantităţi corespunzătoare volumului corpului 1 şi al capacităţii 14. Se scoate capacul 6 împreună cu sursa de radiaţie ultravioletă 9, conectată prin convertorul 11, se instalează cartuşul utilizat cu cărbune activ, se închide capacul 6 al corpului 1, după care soluţia preparată se debitează în instalaţie. Apoi se conectează pompa peristaltică 16 care barbotează aer, drept urmare, soluţia regenerativă din capacitatea 14 umple întreg volumul instalaţiei şi prin intermediul racordului de evacuare 13 trece înapoi în capacitatea 14. În acelaşi timp, este conectat generatorul de ultrasunet 3 şi tubul din cuarţ 8, ca rezultat începe procesul de regenerare a cărbunelui activ în cartuşul 5 conform mecanismului menţionat. The regeneration solution is prepared in distilled water with a low mineral content, which includes, for example, 1…3% hydrogen peroxide, 0.005…0.01 g/L of iron (III) oxalate in quantities corresponding to the volume of the body 1 and the capacity 14. The cover 6 is removed together with the ultraviolet radiation source 9, connected via the converter 11, the used cartridge with activated carbon is installed, the cover 6 of the body 1 is closed, after which the prepared solution is discharged into the installation. Then the peristaltic pump 16 is connected, which bubbles air, as a result, the regenerative solution from the capacity 14 fills the entire volume of the installation and through the outlet connection 13 passes back into the capacity 14. At the same time, the ultrasound generator 3 and the quartz tube 8 are connected, as a result, the process of regeneration of the activated carbon in the cartridge 5 begins according to the mentioned mechanism.

Tubul din cuarţ 8 asigură un flux de raze ultraviolete şi izolează sursa de radiaţie ultravioletă 9 de lichid, iar reflectorul 12 îmbunătăţeşte utilizarea energiei radiaţiei la procesul de degradare fotocatalitică a substanţelor organice spălate din cărbunele activ. Dozatorul 15, cu reactivul Fenton asigură, la necesitate, ajustarea soluţiei regenerante pe măsura epuizării acesteia. The quartz tube 8 provides a flow of ultraviolet rays and isolates the ultraviolet radiation source 9 from the liquid, and the reflector 12 improves the use of radiation energy in the process of photocatalytic degradation of organic substances washed from the activated carbon. The dispenser 15, with the Fenton reagent, ensures, if necessary, the adjustment of the regenerating solution as it is depleted.

Soluţia regenerantă poate fi eliminată, dacă este necesar, printr-un racord de evacuare (nu este indicat în figură) şi înlocuită cu una nouă. The regenerating solution can be removed, if necessary, through a drain connection (not shown in the figure) and replaced with new one.

Astfel, aplicarea invenţiei date asigură simplificarea construcţiei instalaţiei, îmbunătăţirea procesului de regenerare a cartuşului standard cu cărbune activ utilizat pentru epurarea apei de compuşi organici. Thus, the application of the present invention ensures simplification of the construction of the installation, improvement of the regeneration process of the standard activated carbon cartridge used for purifying water from organic compounds.

1. Lupaşcu T. Cărbuni activi din materii prime vegetale. Chişinău, Ştiinţa, 2004, p.189-199 1. Lupaşcu T. Activated carbons from vegetable raw materials. Chisinau, Ştiinta, 2004, p.189-199

2. MD 3726 G2 2009.06.30 2. MD 3726 G2 2009.06.30

Claims (1)

Instalaţie pentru regenerarea cartuşului cu cărbune activ sau cu absorbanţi minerali, utilizat pentru epurarea apei de compuşi organici, care constă dint-un corp cilindric cu fund semisferic unit cu un racord de debitare a soluţiei de regenerare, totodată corpul este dotat cu un capac detaşabil cu un racord pentru evacuarea aerului, de partea internă a capacului este fixat un tub din cuarţ cu o sursă de radiaţie ultravioletă, iar pe peretele intern al corpului este amplasat un reflector, corpul prin intermediul unui racord de evacuare este unit cu o capacitate pentru soluţia de regenerare, dotată cu un dozator pentru reactivul Fenton şi unită prin intermediul unei pompe peristaltice cu racordul de debitare a soluţiei de regenerare, iar la ultimul este unit şi un dispozitiv de debitare a aerului, pe fundul corpului este amplasat un generator de ultrasunet, totodată între generator şi tubul de cuarţ sunt executate suporturi pentru cartuşul supus regenerării.Installation for regenerating the cartridge with activated carbon or mineral absorbents, used for purifying water from organic compounds, which consists of a cylindrical body with a hemispherical bottom connected to a connection for discharging the regeneration solution, at the same time the body is equipped with a removable cover with a connection for exhausting air, a quartz tube with an ultraviolet radiation source is fixed to the inner side of the cover, and a reflector is placed on the inner wall of the body, the body is connected by means of an exhaust connection to a capacity for the regeneration solution, equipped with a dispenser for the Fenton reagent and connected by means of a peristaltic pump to the connection for discharging the regeneration solution, and an air discharge device is also connected to the latter, an ultrasound generator is placed on the bottom of the body, at the same time supports for the cartridge subject to regeneration are made between the generator and the quartz tube.
MDS20100095A 2010-05-24 2010-05-24 Installation for the regeneration of cartridge with activated carbon or mineral sorbents used for purification of water from organic compounds MD320Z (en)

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