ITPR20100020A1 - PROCEDURE AND IMPLANTATION TO REDUCE SOIL AND SLUDGE IMPREGNATED WITH HEAVY HYDROCARBONS. - Google Patents
PROCEDURE AND IMPLANTATION TO REDUCE SOIL AND SLUDGE IMPREGNATED WITH HEAVY HYDROCARBONS. Download PDFInfo
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- ITPR20100020A1 ITPR20100020A1 IT000020A ITPR20100020A ITPR20100020A1 IT PR20100020 A1 ITPR20100020 A1 IT PR20100020A1 IT 000020 A IT000020 A IT 000020A IT PR20100020 A ITPR20100020 A IT PR20100020A IT PR20100020 A1 ITPR20100020 A1 IT PR20100020A1
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- Italy
- Prior art keywords
- sludge
- soils
- water
- phase
- hydrocarbons
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 36
- 150000002430 hydrocarbons Chemical class 0.000 title claims description 31
- 229930195733 hydrocarbon Natural products 0.000 title claims description 30
- 239000002689 soil Substances 0.000 title claims description 25
- 239000010802 sludge Substances 0.000 title claims description 24
- 238000002513 implantation Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 12
- 239000012071 phase Substances 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 5
- 238000006065 biodegradation reaction Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000011343 solid material Substances 0.000 claims description 5
- 238000005067 remediation Methods 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000005325 percolation Methods 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 239000011345 viscous material Substances 0.000 claims description 2
- 238000000265 homogenisation Methods 0.000 claims 2
- 238000013019 agitation Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 230000003449 preventive effect Effects 0.000 claims 1
- 239000007790 solid phase Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 238000003795 desorption Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 210000004197 pelvis Anatomy 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/06—Reclamation of contaminated soil thermally
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Thermal Sciences (AREA)
- Soil Sciences (AREA)
- Treatment Of Sludge (AREA)
- Disintegrating Or Milling (AREA)
Description
TITOLO: Procedimento e impianto per risanare terreni e fanghi impregnati di idrocarburi pesanti. TITLE: Process and plant for the rehabilitation of soils and sludge impregnated with heavy hydrocarbons.
DESCRIZIONE DESCRIPTION
Il presente trovato si inserisce nel campo dei procedimenti di risanamento dei terreni e di fanghi impregnati di idrocarburi pesanti. The present invention falls within the field of procedures for the rehabilitation of soils and sludge impregnated with heavy hydrocarbons.
Esistono a tutt’oggi innumerevoli siti contaminati da idrocarburi pesanti, riguardanti tutta la filiera degli oli minerali, sia presso i campi petroliferi ove avviene la ricerca e produzione di greggio, sia presso i luoghi di lavorazione e grande distribuzione degli stessi. La maggior parte di questi inquinamenti riguarda la parte pesante degli idrocarburi contenuti nell’olio greggio di petrolio, ad esempio greggio evaporato, gasoli ed oli combustibili più o meno invecchiati, fondami ed altri residui di lavorazione. Inoltre, proprio in conseguenza dell’elevata viscosità di detti oli, il loro grado di impregnazione del terreno/fango à ̈ elevato, raggiungendo concentrazioni di qualche decina di unità percentuali. To date, there are countless sites contaminated by heavy hydrocarbons, covering the entire mineral oil supply chain, both in the oil fields where crude oil is researched and produced, and in the places of processing and large distribution of the same. Most of these pollutions concern the heavy part of the hydrocarbons contained in crude petroleum oil, for example evaporated crude oil, more or less aged diesel and fuel oils, sludge and other processing residues. Furthermore, precisely as a consequence of the high viscosity of these oils, their soil / mud impregnation degree is high, reaching concentrations of a few tens of percentage units.
Queste situazioni di criticità sono state recuperate solo in misura limitata per mancata disponibilità di procedimenti efficaci La tecnica nota prevede infatti: These critical situations have been recovered only to a limited extent due to the lack of availability of effective procedures. The known technique in fact provides:
-procedimenti di biodegradazione, - biodegradation procedures,
-procedimenti di desorbimento termico, - thermal desorption procedures,
-procedimenti basati sull’addizione ed estrazione con solventi e/o tensioattivi. -procedures based on addition and extraction with solvents and / or surfactants.
La biodegradazione à ̈ un processo mediante il quale microrganismi quali batteri, funghi, muffe scompongono composti organici complessi in prodotti più semplici dai quali ottenere energia e nutrimento; à ̈ un processo naturale che lentamente, talvolta nell’arco di alcuni anni rimuove la presenza di oli ed idrocarburi dall’ambiente. Biodegradation is a process by which microorganisms such as bacteria, fungi, molds break down complex organic compounds into simpler products from which to obtain energy and nourishment; It is a natural process that slowly, sometimes over a few years, removes the presence of oils and hydrocarbons from the environment.
La tecnologia di desorbimento termico concerne la separazione fisica di contaminanti organici dalla matrice, mediante un riscaldamento diretto o indiretto ad elevate temperature che variano da 200 °C a 500 °C. Thermal desorption technology concerns the physical separation of organic contaminants from the matrix, by direct or indirect heating at high temperatures ranging from 200 ° C to 500 ° C.
Nei procedimenti basati sull’addizione ed estrazione con solventi e/o tensioattivi il liquido di lavaggio nelle configurazioni impiantistiche à ̈ costituito da soluzioni acquose contenenti specifici reagenti chimici in grado di promuovere il passaggio degli inquinanti dal suolo alla soluzione estraente. In procedures based on addition and extraction with solvents and / or surfactants, the washing liquid in the plant configurations consists of aqueous solutions containing specific chemical reagents capable of promoting the passage of pollutants from the soil to the extracting solution.
Inconvenienti della tecnica nota sono principalmente: Drawbacks of the known art are mainly:
• Nel caso della biodegradazione il fatto che il processo di risanamento avviene in tempi elevati, ad esempio anni, essendo questo un processo naturale non particolarmente veloce. â € ¢ In the case of biodegradation, the fact that the recovery process takes place over a long period of time, for example years, as this is a natural process that is not particularly fast.
• Il fatto che il desorbimento termico risulta essere molto costoso dovendo riscaldare terreni/fanghi ad elevate temperature che comportano, peraltro, la vaporizzazione dell’acqua inizialmente presente nel materiale. â € ¢ The fact that thermal desorption turns out to be very expensive since it is necessary to heat soils / sludge at high temperatures which, moreover, involve the vaporization of the water initially present in the material.
• Nel caso dei procedimenti basati sull’addizione ed estrazione con solventi e/o tensioattivi principalmente il fatto di ottenere, come effetto collaterale, un inquinamento da solventi e/o tensioattivi; in secondo luogo il fatto di dover estrarre i solventi/tensioattivi dai terreni/fanghi una volta bonificati dagli idrocarburi; infine il fatto di dover poi estrarre i solventi/tensioattivi dagli idrocarburi stessi. â € ¢ In the case of procedures based on addition and extraction with solvents and / or surfactants, mainly the fact of obtaining, as a side effect, pollution from solvents and / or surfactants; secondly, the fact of having to extract the solvents / surfactants from the soils / sludge once they have been cleared of hydrocarbons; finally, the fact of having to extract the solvents / surfactants from the hydrocarbons themselves.
Scopo del presente trovato à ̈ quello di risolvere i problemi sopra citati mettendo a disposizione un trattamento capace innanzitutto di recuperare gli idrocarburi ed inoltre di massimizzarne il recupero senza eccessivo riscaldamento. Il procedimento oggetto del presente trovato à ̈ caratterizzato dal fatto di sottoporre il materiale impregnato ad almeno una fase di recupero della maggior parte degli idrocarburi tramite riscaldamento e fusione, seguita da fluidificazione, dispersione, sedimentazione e decantazione. La sequenza, inoltre, inizia ed avviene direttamente “in situ†, ovvero nel luogo in cui detto materiale giace. The purpose of the present invention is to solve the above-mentioned problems by providing a treatment capable of recovering the hydrocarbons first of all and also of maximizing their recovery without excessive heating. The process of the present invention is characterized in that it subjects the impregnated material to at least one step of recovery of most of the hydrocarbons by heating and melting, followed by fluidification, dispersion, sedimentation and decantation. Furthermore, the sequence begins and takes place directly â € œin situâ €, that is, in the place where said material lies.
I vantaggi che si ottengono dal procedimento per risanare terreni e fanghi impregnati di idrocarburi pesanti sono quindi essenzialmente: The advantages that are obtained from the procedure for remedying soils and sludge impregnated with heavy hydrocarbons are therefore essentially:
• il fatto di utilizzare temperature blande di riscaldamento dei terreni/fanghi, comprese in un range di 60°-100°C e di conseguenza â € ¢ the fact of using mild temperatures to heat the soils / sludge, included in a range of 60 ° -100 ° C and consequently
• l’economicità di questo procedimento di bonifica dei terreni/fanghi; â € ¢ the cost-effectiveness of this land / mud remediation process;
• il fatto di non avere effetti inquinanti come ha invece il sopraccitato procedimento con solventi/tensioattivi; • il fatto di avere brevi tempi di rimozione degli idrocarburi contenuti nel materiale impregnato; â € ¢ the fact that it does not have polluting effects as the aforementioned procedure with solvents / surfactants does; â € ¢ having short removal times for the hydrocarbons contained in the impregnated material;
• il fatto di recuperare e restituire il potere calorifico contenuto nel terreno/fango impregnato. â € ¢ the fact of recovering and returning the calorific value contained in the soaked soil / mud.
Detti scopi e vantaggi sono tutti raggiunti dal procedimento per risanare terreni e fanghi impregnati di idrocarburi pesanti oggetto del presente trovato, che si caratterizza per quanto previsto nelle sotto riportate rivendicazioni. Said objects and advantages are all achieved by the process for rehabilitating soils and sludge impregnated with heavy hydrocarbons, object of the present invention, which is characterized by the provisions of the appended claims.
Questa ed altre caratteristiche risulteranno maggiormente evidenziate dalla descrizione seguente di alcune forme preferite di realizzazione illustrate, a puro titolo esemplificativo e non limitativo nelle unite tavole di disegno. This and other characteristics will become more evident from the following description of some preferred embodiments illustrated, purely by way of non-limiting example in the accompanying drawing tables.
- Figura 1: illustra uno schema della piattaforma mobile di pompaggio; - Figure 1: shows a diagram of the mobile pumping platform;
- Figura 2: illustra uno schema relativo all’alimentazione dell’impianto, con mezzo meccanico, di una miscela prevalentemente solida o fangosa e comunque ricca di materiale solido, secondo una prima forma di realizzazione; - Figure 2: illustrates a diagram relating to the feeding of the plant, by mechanical means, of a mixture mainly solid or muddy and in any case rich in solid material, according to a first embodiment;
- Figura 3: illustra uno schema del procedimento in cui l’alimentazione avviene direttamente da pompa in un riscaldatore miscelatore, secondo una seconda forma di realizzazione; - Figure 3: illustrates a scheme of the process in which the feeding takes place directly from the pump into a mixer heater, according to a second embodiment;
- Figura 4: illustra uno schema complessivo del procedimento comprendente le due forme di realizzazione sopraccitate. - Figure 4: illustrates an overall scheme of the process comprising the two aforementioned embodiments.
Con particolare riferimento alla figura 1, sono indicate con 2 e 21 due serpentine percorse da fluido caldo immerse nel materiale inquinato 1 impregnato di idrocarburo pesante. With particular reference to Figure 1, 2 and 21 indicate two coils traversed by hot fluid immersed in the polluted material 1 impregnated with heavy hydrocarbon.
Dette serpentine 2 e 21 sono preposte al riscaldamento del terreno per portare a fusione buona parte degli idrocarburi intrisi nel materiale inquinato 1. Said coils 2 and 21 are responsible for heating the ground to melt most of the hydrocarbons soaked in the polluted material 1.
La temperatura di riscaldamento dei terreni/fanghi, Ã ̈ compresa in un range di 60°-100°C in base alla tipologia di idrocarburo. The heating temperature of the soils / sludge is included in a range of 60 ° -100 ° C according to the type of hydrocarbon.
Con 3 si à ̈ indicata una piattaforma mobile in grado di percorrere il materiale inquinato 1. Detta piattaforma mobile 3 porta con sé una pompa 4, calata a piacimento, capace di pompare il liquido ed il semiliquido all’impianto di trattamento. The reference 3 indicates a mobile platform capable of traversing the polluted material 1. Said mobile platform 3 carries with it a pump 4, lowered at will, capable of pumping the liquid and the semi-liquid to the treatment plant.
La piattaforma mobile 3 porta anche una pompa 5, anch’essa calata a piacimento, in grado di pompare materiale più viscoso di quello pompabile dalla pompa 4 comprendente materiale solido in sospensione acquosa e oleosa nonché fanghi e materiali analoghi di difficile movimentazione. The mobile platform 3 also carries a pump 5, also lowered at will, capable of pumping more viscous material than that pumpable by the pump 4 comprising solid material in aqueous and oily suspension as well as sludge and similar materials that are difficult to handle.
Detta piattaforma mobile 3 à ̈ inoltre munita di arrivo di acqua che viene riscaldata in uno scambiatore di calore 6 con fluido caldo analogamente a quello di un altro scambiatore di calore 7. Detta acqua viene successivamente iniettata nel materiale inquinato 1, nelle immediate vicinanze del gruppo di pompe, attraverso degli ugelli spruzzatori 8 aventi la funzione di disgregare, riscaldare e facilitare la pompabilità del materiale contenuto, anche solido, destinato all’impianto di trattamento. Said mobile platform 3 is also equipped with the arrival of water which is heated in a heat exchanger 6 with hot fluid similar to that of another heat exchanger 7. Said water is subsequently injected into the polluted material 1, in the immediate vicinity of the unit. of pumps, through spray nozzles 8 having the function of breaking up, heating and facilitating the pumpability of the contained material, even solid, destined for the treatment plant.
La piattaforma mobile 3 presenta una pompa 9 che aspira il materiale pompabile e lo invia allo scambiatore di calore 7 dove viene riscaldato con calore fornito da un circuito chiuso 11 di olio diatermico (o in alternativa di acqua calda o qualsiasi altro fluido trasportatore di calore). The mobile platform 3 has a pump 9 which sucks the pumpable material and sends it to the heat exchanger 7 where it is heated with heat supplied by a closed circuit 11 of diathermic oil (or alternatively of hot water or any other heat-carrying fluid) .
Attraverso gli ugelli 8 detto materiale viene immesso nel materiale inquinato 1 e viene disgregato. Through the nozzles 8 said material is introduced into the polluted material 1 and is broken up.
Sono presenti anche degli agitatori 10 preposti all’omogeneizzazione del materiale in fluidificazione ed alla facilitazione dei processi ivi descritti. There are also agitators 10 for homogenizing the material in fluidization and facilitating the processes described therein.
La miscela plurifasica proveniente dalla piattaforma mobile 3 inizia la sua lavorazione nell’impianto di trattamento composto dai seguenti principali dispositivi in parte differenziati in funzione della composizione del materiale affluente. The multi-phase mixture coming from the mobile platform 3 begins its processing in the treatment plant composed of the following main devices, partly differentiated according to the composition of the inflowing material.
Con particolare riferimento alla figura 2, con 12 viene indicata una tramoggia riscaldata in cui viene inserita una miscela prevalentemente fangosa e ricca di materiale solido, riscaldata fino alla temperatura voluta With particular reference to Figure 2, 12 indicates a heated hopper into which a predominantly muddy mixture rich in solid material is inserted, heated up to the desired temperature.
Detta tramoggia 12 à ̈ munita di una griglia 13 di separazione di materiali molto grossolani, dopodiché alimenta un tamburo rotante 14 avente anche una funzione di miscelatore disgregatore. Said hopper 12 is equipped with a grid 13 for separating very coarse materials, after which it feeds a rotating drum 14 which also has the function of a mixer-disintegrator.
Il tamburo rotante 14 Ã ̈ munito di vagli interni 15 e percorso da acqua riscaldata necessaria per separare il materiale solido grossolano, che viene scaricato, da quello fine e dalle fasi liquide, che confluiscono in un sedimentatore disoleatore 16. The rotating drum 14 is equipped with internal screens 15 and run through by heated water necessary to separate the coarse solid material, which is discharged, from the fine one and the liquid phases, which flow into an oil separator 16.
In detto sedimentatore disoleatore 16 la miscela viene mantenuta alla temperatura voluta ed avviene la separazione degli idrocarburi nella parte alta, sovrastante l’acqua. A loro volta gli idrocarburi vengono pompati in un serbatoio 17 tramite una pompa 18 per il recupero agli usi tipici degli idrocarburi. In said oil separator sedimenter 16 the mixture is kept at the desired temperature and the separation of the hydrocarbons takes place in the upper part, above the water. In turn, the hydrocarbons are pumped into a tank 17 by means of a pump 18 for recovery to the typical uses of hydrocarbons.
Dal sedimentatore disoleatore 16 si estrae anche una certa frazione di acqua chiarificata che tramite una pompa 19 confluisce alla prima sezione di un bacino 20 per il successivo trattamento. A certain fraction of clarified water is also extracted from the oil separator sedimenter 16 which, by means of a pump 19, flows into the first section of a basin 20 for subsequent treatment.
Il materiale sul fondo del sedimentatore disoleatore 16 e la frazione solida di sabbia e ghiaia, comprendente la parte fine, vengono estratti insieme all’acqua rimanente e convogliati ad un dispersore 22 munito di un agitatore 23 meccanico e capace di togliere ulteriori frazioni idrocarburiche dalle frazioni solide. The material on the bottom of the oil separator 16 and the solid fraction of sand and gravel, including the fine part, are extracted together with the remaining water and conveyed to a disperser 22 equipped with a mechanical stirrer 23 and capable of removing further hydrocarbon fractions from the solid fractions.
Con 24 si à ̈ indicata una pompa che convoglia la miscela uscente dal dispersore 22 ad un gruppo di idrocicloni 25 che separa nella parte superiore 25a le principali fasi leggere, olio e acqua torbida, nella parte inferiore 25b sabbia e ghiaia miste ad acqua. Reference 24 indicates a pump which conveys the mixture coming out of the disperser 22 to a group of hydrocyclones 25 which separates the main light phases, oil and turbid water in the upper part 25a, and sand and gravel mixed with water in the lower part 25b.
La sopradetta miscela di sabbia/ghiaia/acqua, uscente dalla parte inferiore 25b del gruppo di idrocicloni 25, viene separata in un vaglio 26 con ottenimento da una parte di materiale inerte, dall’altra di acqua convogliata alla prima sezione del bacino 20. The aforementioned mixture of sand / gravel / water, coming out from the lower part 25b of the group of hydrocyclones 25, is separated in a sieve 26 obtaining one part of inert material, the other of water conveyed to the first section of the basin 20.
La miscela uscente dalla parte superiore 25a del gruppo di idrocicloni 25 entra in un decantatore 27 che separa l’ulteriore frazione di idrocarburi (convogliata poi al serbatoio 17) dalla frazione composta da acqua e materiali fini, che confluisce mediante una pompa 28 alla prima sezione del bacino 20. The mixture coming out from the upper part 25a of the group of hydrocyclones 25 enters a decanter 27 which separates the further hydrocarbon fraction (then conveyed to the tank 17) from the fraction composed of water and fine materials, which flows through a pump 28 to the first pelvis section 20.
Come detto precedentemente le acque provenienti dai vari stadi, torbide nella misura in cui contengono frazioni fini e finissime tipo limo e/o argilla, confluiscono in uno o più bacini 20 multistadio, dove vengono pareggiate come portata e temperatura, sottoposte a decantazione e a biodegradazione in fase “sludge†senza utilizzo di ozono. As previously mentioned, the waters coming from the various stages, turbid to the extent that they contain fine and very fine fractions such as silt and / or clay, flow into one or more 20 multistage basins, where they are equalized in terms of flow rate and temperature, subjected to decantation and biodegradation in â € œsludgeâ € phase without the use of ozone.
L’acqua in esubero subisce una depurazione biologica a percolazione 29 prima dello scarico finale. The excess water undergoes a biological purification by percolation 29 before the final discharge.
Viceversa buona parte delle acque, dopo chiarificazione, viene riciclata per le varie utenze del processo. Conversely, a large part of the water, after clarification, is recycled for the various users of the process.
Una variante del procedimento à ̈ illustrata nella figura 3. Essa consiste nel fatto che l’alimentazione all’impianto di trattamento può avvenire direttamente al riscaldatore miscelatore 30, munito di agitatori 31, mantenuto in riscaldamento anche tramite la circolazione di acqua, che viene prelevata nella parte inferiore del riscaldatore miscelatore 30 da una pompa 32 e riscaldata mediante uno scambiatore di calore 33. A variant of the procedure is illustrated in figure 3. It consists in the fact that the feeding to the treatment plant can take place directly to the mixer heater 30, equipped with agitators 31, kept in heating also through the circulation of water, which it is taken in the lower part of the mixer heater 30 by a pump 32 and heated by means of a heat exchanger 33.
Claims (13)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITPR2010A000020A IT1398870B1 (en) | 2010-03-19 | 2010-03-19 | PROCEDURE AND IMPLANTATION TO REDUCE SOIL AND SLUDGE IMPREGNATED WITH HEAVY HYDROCARBONS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITPR2010A000020A IT1398870B1 (en) | 2010-03-19 | 2010-03-19 | PROCEDURE AND IMPLANTATION TO REDUCE SOIL AND SLUDGE IMPREGNATED WITH HEAVY HYDROCARBONS. |
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| Publication Number | Publication Date |
|---|---|
| ITPR20100020A1 true ITPR20100020A1 (en) | 2011-09-20 |
| IT1398870B1 IT1398870B1 (en) | 2013-03-21 |
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| ITPR2010A000020A IT1398870B1 (en) | 2010-03-19 | 2010-03-19 | PROCEDURE AND IMPLANTATION TO REDUCE SOIL AND SLUDGE IMPREGNATED WITH HEAVY HYDROCARBONS. |
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| US5103578A (en) * | 1991-03-26 | 1992-04-14 | Amoco Corporation | Method and apparatus for removing volatile organic compounds from soils |
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| US5836718A (en) * | 1997-01-13 | 1998-11-17 | Price; Philip A. | Method and apparatus for ex situ cleaning of contaminated soil |
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| WO2004026496A1 (en) * | 2002-09-23 | 2004-04-01 | Alphonse Graffeo | System for treating sludge and hydrocarbon waste from a refinery |
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2010
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| US5836718A (en) * | 1997-01-13 | 1998-11-17 | Price; Philip A. | Method and apparatus for ex situ cleaning of contaminated soil |
| WO2000049269A1 (en) * | 1999-02-17 | 2000-08-24 | Mcintyre Barry E | Method and apparatus for cleaning drill cuttings |
| WO2004026496A1 (en) * | 2002-09-23 | 2004-04-01 | Alphonse Graffeo | System for treating sludge and hydrocarbon waste from a refinery |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1398870B1 (en) | 2013-03-21 |
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