EP3661626A1 - Device for reducing fumes, dust and odours of a gaseous fluid - Google Patents

Device for reducing fumes, dust and odours of a gaseous fluid

Info

Publication number
EP3661626A1
EP3661626A1 EP18759176.3A EP18759176A EP3661626A1 EP 3661626 A1 EP3661626 A1 EP 3661626A1 EP 18759176 A EP18759176 A EP 18759176A EP 3661626 A1 EP3661626 A1 EP 3661626A1
Authority
EP
European Patent Office
Prior art keywords
tank
processing fluid
branch
fluid
gaseous fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP18759176.3A
Other languages
German (de)
French (fr)
Inventor
Nino Meogrossi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Onofri Mauro
Original Assignee
Onofri Mauro
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Onofri Mauro filed Critical Onofri Mauro
Publication of EP3661626A1 publication Critical patent/EP3661626A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • 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
    • B01D53/1487—Removing organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2221/00—Applications of separation devices
    • B01D2221/08—Mobile separation devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04—Regenerating the washing fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/08—Means for controlling the separation process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/14—Fan arrangements for providing induced draft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • 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

Definitions

  • This invention relates to a device for reducing fumes, dust and odours of a gaseous fluid.
  • Figure 1 illustrates a schematic front view of the device according to the invention
  • Figure 2 illustrates a schematic perspective view of the device of Figure 1 with some parts cut away to better illustrate others;
  • FIG. 3 illustrates a schematic block diagram of the components of the device according to the invention. Detailed description of preferred embodiments of the invention
  • the device 1 comprises a closed tank 5 for processing the gaseous fluid to be processed.
  • the device 1 comprises five pipes 17 for conveying the water.
  • the extraction branch 26 comprises a respective opening and closing valve "V3" to enable or prevent the passage leaving the tank 5.
  • the heating means 32 should be actuated.
  • the pipe 37 for supplying the deodorising substance leads close to the pipes 17 close to the inlet duct 3.
  • the dose of the deodorising substance to be picked from the tank 36 is determined by a pulse electronic control unit 38.
  • unprocessed gaseous fluid present in the inlet duct 3 has a temperature of approximately 140°C and the processed gaseous fluid present in the outlet duct 4 has a temperature of approximately 40°C.
  • the processing fluid which is used by the delivery means 16 is processing fluid contained in the tank 5 mixed with the substances separated from the processing fluid to the gaseous fluid to be processed, which in terms of chemical properties will no longer be comparable with the processing fluid introduced into the tank 5 before use of the device 1 .
  • the wood was burnt for a few seconds and the flames were left to stabilise themselves.
  • the sampling system with a 0.2 ⁇ porosity filter was connected immediately at the outlet of the oven and immediately after the outlet of the device 1 .
  • the fire was re-lit using olive residue as fuel, a type of aromatic wood, and the VOCs (volatile organic compounds) were monitored with an automatic PID analyser, model Corvus-lon Science.
  • the last phase of the study was aimed specifically at the monitoring of VOCs upstream and downstream of the device 1 .
  • Table 3 shows the results, in total concentrations (expressed in ppm), of the sampling operations performed.
  • the prototype has a reduction efficiency greater than 100% for the total dusts
  • the prototype has a 100% efficiency for reducing the odours (VOCs).
  • VOCs odours

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

Described is a device for reducing fumes, dust and odours of a gaseous fluid which comprises an inlet duct (3) of the gaseous fluid to be processed and an outlet duct (4) of the gaseous fluid processed by the device (1 ) and a closed tank (5) for processing the gaseous fluid; more specifically, the inlet duct (3) is in communication with the tank (5) through an inlet opening (3a) and the outlet duct (4) is in communication with the tank (5) through an outlet opening (4a); a hydraulic system (7) for conveying a processing fluid, in particular water, entering and leaving the processing tank (5); the hydraulic system (7) comprises means (16) for dispensing the nebulised processing fluid positioned inside the tank (5) at a height which is greater than the inlet opening (3a) of the inlet duct (3) of the tank and the outlet opening (4a) of the outlet duct (4); during the path of the gaseous fluid in the tank (5) from the inlet opening (3a) of the inlet duct (3) to the outlet opening (4a) of the outlet duct (4), the dispensing means (16) are configured for continuously dispensing the nebulised processing fluid on the gaseous fluid.

Description

DESCRIPTION
DEVICE FOR REDUCING FUMES, DUST AND ODOURS OF A
GASEOUS FLUID
Technical field
This invention relates to a device for reducing fumes, dust and odours of a gaseous fluid.
Background art
The recent regulations are aimed at imposing increasingly strict limits on the emission into the atmosphere of substances considered harmful for human health, such as, for example carbon dioxide and particulate.
These polluting substances derive from the combustion of solid fuels such as fossil fuels, for example wood, pellets, biomasses, coal, olive residues.
Moreover, according to recent regulations, the odours deriving from the combustion should be limited.
Disclosure of the invention
In this context, one aspect of this invention is that of providing a device for reducing fumes, dust and odours of a gaseous fluid comprising an inlet duct of the gaseous fluid to be processed and an outlet duct of the gaseous fluid processed by the device and a closed tank for processing the gaseous fluid.
The inlet duct is in communication with the tank by means of an inlet opening and the outlet duct is in communication with the tank through an outlet opening.
A hydraulic system, which conveys processing fluid entering and leaving the processing tank, comprises delivery means of a nebulised processing fluid positioned inside the tank at a height which is greater than the inlet opening of the inlet duct of the tank and the outlet opening of the outlet duct.
During the path of the gaseous fluid in the tank from the inlet opening of the inlet duct to the outlet opening of the outlet duct, the dispensing means are configured for continuously dispensing the nebulised processing fluid on the gaseous fluid.
Advantageously, the action of the nebulised processing fluid on the gaseous fluid is able to reduce 100% of the content of dust present and 100% of the odours and some chemical substances harmful for man.
Brief description of drawings
Further features and advantages of this invention are more apparent from the non-limiting description which follows of a preferred embodiment of a device for reducing fumes, dust and odours of a gaseous fluid as illustrated in the accompanying drawings, in which:
Figure 1 illustrates a schematic front view of the device according to the invention;
Figure 2 illustrates a schematic perspective view of the device of Figure 1 with some parts cut away to better illustrate others;
Figure 3 illustrates a schematic block diagram of the components of the device according to the invention. Detailed description of preferred embodiments of the invention
With reference to Figure 1 , the numeral 1 denotes a device for reducing fumes, dust and odours of a gaseous fluid according to the invention.
The term gaseous fluid means, for example, the fumes produced from burning, for example of fossil fuel, or fumes deriving from the cooking of food products.
As may be seen in Figure 1 , the device 1 is equipped with movement means 2, in particular wheels, which allow the device 1 to be positioned in a suitable installation place or site.
The device 1 comprises an inlet duct 3 of the gaseous fluid to be processed and an outlet duct 4 of the gaseous fluid processed by the device 1 . The inlet duct 3 may be connected to a discharge pipe, not illustrated, of gas produced from combustion.
Alternatively, the inlet duct 3 is left in communication with the outside environment of which the air is to be processed.
The outlet duct 4 has a fan 34 for sucking the gaseous fluid processed which conveys it to the outside of the device 1 .
The outlet duct 4 may be connected to a pipe discharging into the atmosphere or it may lead directly into the atmosphere.
The device 1 comprises a closed tank 5 for processing the gaseous fluid to be processed.
The tank 5 has a front wall 5a, rear wall 5b, a pair of side walls 5c, 5d, a bottom wall 5e and an upper wall 5f.
The upper wall 5f is defined by a removable cover 6 which makes it possible to access inside the tank 5.
The movement means 2 are positioned under the bottom wall 5e of the tank 5.
The inlet duct 3 is in communication with the tank 5 through an inlet opening 3a.
The outlet duct 4 is in communication with the tank 5 through an outlet opening 4a.
The inlet duct 3 and the outlet duct 4 are located at respective side walls 5c, 5d of the tank 5, opposite to each other.
The inlet duct 3 is equipped with a pyrometer 8 for measuring the temperature of the gaseous fluid entering the device 1 .
The outlet duct 4 is provided with a thermometer 9 for measuring the temperature of the processed gaseous fluid at the device 1 outlet.
The tank 5 is equipped with a thermometer 10 for measuring the temperature of the gaseous fluid in the tank 5.
The thermometer 10 is positioned at the upper wall 5f of the tank, in particular on the cover 6.
The device 1 comprises a hydraulic system 7 for conveying a processing fluid entering and leaving the tank 5.
The hydraulic system 7 comprises at least one branch 1 1 for supplying the processing fluid inside the tank 5.
The supply branch 1 1 is configured to be connected to a hydraulic source, such as the water mains, schematically illustrated with the block labelled 12.
According to this method of use, the processing fluid is water drawn from the water mains 12.
Alternatively, the supply branch 1 1 is configured to be connected to a tank for containing the processing fluid, schematically illustrated with the block labelled 12.
According to this variant, the processing fluid could be a chemical solution different from the water.
The supply branch 1 1 comprises a respective opening and closing valve "V1 " to allow or prevent the passage of the processing fluid from the source 12 of the processing fluid to the tank 5.
The opening and closing valve V1 can be operated manually.
In order to interrupt the flow of the processing fluid into the tank 5 from the supply branch 1 1 , a shutter 13 of the supply branch 1 1 is configured to be controlled by activating means 14, for example in the form of a float, once the maximum filling level of the tank 5 is reached.
The tank 5 is provided with an emergency discharge, not illustrated, for activating the shutter 13 if the filling level exceeds the predetermined maximum level.
In a preferred embodiment, the tank 5 is configured to contain 130 litres of water.
The hydraulic 7 comprises a discharge branch 15 of the contents of the tank 5, comprising a respective opening and closing valve "V5" which can be operated should it be necessary discharge the entire contents of the tank 5.
The hydraulic system 7 comprises means 16 for dispensing the nebulised processing fluid positioned inside the tank 5 at a height which is greater than the inlet opening 3a of the inlet duct 3 of the tank 5 and the outlet opening 4a of the outlet duct 4.
The dispensing means 16 are located under the cover 6 of the tank 5. The dispensing means 16 are in the form of nebulising nozzles.
Preferably, the nozzles 16 dispense nebulised processing fluid according to a fan-style dispensing profile.
The dispensing pressure of the nozzles 16 is approximately 0.5 bar.
The hydraulic system 7 comprises a plurality of pipes 17 for conveying the processing fluid to the respective dispensing means 16.
The pipes 17 for conveying the processing fluid to the dispensing means
16 are positioned parallel to one another, parallel to the side walls 5c, 5d of the tank 5 where the inlet opening 3a of the inlet duct 3 and the outlet opening 5a of the outlet duct 5 are located.
The tank 5 comprises at least one panel 24 for separating two pipes 17 arranged successive to each other.
The pipes 17 for conveying the processing fluid are supplied preferably by a single manifold 18.
The conveying pipes 17 are positioned inside the tank 5 at a height which is greater than the inlet opening 3a of the inlet duct 3 of the tank 5 and the outlet opening 4a of the outlet duct 4.
The conveying pipes 17 are positioned under the cover 6 of the tank 5. Each pipe 17 comprises respective dispensing means 16, or dispensing nozzles 16.
In the embodiment illustrated, the device 1 comprises five pipes 17 for conveying the water.
With reference to the inlet opening 3a of the inlet duct 3, the first pipe 19 comprises a plurality of nozzles 16, at least three, oriented in such a way as to direct the flow of the nebulised processing fluid towards the inlet opening 3a of the inlet duct 3.
The second pipe 20 comprises a plurality of nozzles 16, at least three, oriented in such a way as to direct the flow of the nebulised processing fluid towards the bottom of the tank 5.
The third pipe 21 comprises a plurality of nozzles 16, at least three, oriented in such a way as to direct the flow of the nebulised processing fluid towards the panel 24. In this embodiment, the panel 24 is positioned between the second and the third pipe 20 and 21 .
The fourth pipe 22 comprises a plurality of nozzles 16, at least three, oriented in such a way as to direct the flow of the nebulised processing fluid towards the bottom of the tank 5.
The fifth pipe 23 comprises a plurality of nozzles 16, at least three, oriented in such a way as to direct the flow of the nebulised processing fluid towards the bottom of the tank 5.
Preferably, considering the nozzles 16 positioned on the same pipe 17, the central nozzle is located at a height greater than the side nozzles. In this way, the flows of nebulised processing fluid dispensed by the nozzles 16 are superposed, defining a single barrier which extends from wall 5a to wall 5b of the tank 5.
The number of nozzles 16 positioned on the same pipe 16 is in relation to the dimensions of the tank 5, in particular the distance between the front wall 5a and the rear wall 5b.
The hydraulic system 7 comprises a supply circuit 25 for the dispensing means 16.
The supply circuit 25 makes it possible to supply the dispensing means 16 with the processing fluid contained in the tank 5 defining a recirculation inside the device 1 .
The supply circuit 25 comprises an extraction branch 26 of the contents of the tank 5, located preferably in the proximity of the bottom wall 5e of the tank 5.
The extraction branch 26 comprises a respective opening and closing valve "V3" to enable or prevent the passage leaving the tank 5.
The opening and closing valve V3 can be operated manually. The extraction branch 26 comprises a pump 27 for sucking processing fluid and a filter 28 for purifying water, positioned upstream of the pump 27, with reference to the direction of circulation of the processing fluid inside the extraction branch 26.
Downstream of the pump 27 the supply circuit 25 comprises a delivery branch 29 for conveying the processing fluid extracted from the tank 5 to the pipes 17 for conveying the dispensing means 16, in particular through the manifold 18.
A pressure switch 30 is positioned downstream of the pump 27 with reference to the direction of circulation of the processing fluid inside the delivery branch 29.
Downstream of the pressure switch 30, with reference to the direction of circulation of the processing fluid inside the delivery branch 29, there is a valve "V6" for opening and closing the delivery branch.
During operation of the device 1 the valve V6 allows the passage of the water in the delivery branch 29.
The hydraulic system 7 comprises a connecting branch 31 of the supply branch 1 1 of the tank 5 with the extraction branch 26 of the contents of the tank 5.
The connecting branch 31 comprises a respective valve "V2" for opening and closing to enable or prevent the passage of the processing fluid from the supply branch 1 1 to the extraction branch 26.
The opening and closing valve V2 can be operated manually.
The connecting branch 31 makes it possible to clean the filter 28 with a counterpressure.
To perform the cleaning of the filter 28, the valve "V1 " is positioned in the closed configuration, to prevent the processing fluid drawn from the source 12 entering inside the tank 5, the valve "V3" is positioned in the closed configuration, to prevent the processing fluid drawn from the source 12 entering inside the tank 5 in counter-current through the extraction pipe
26, and the valve "V2" is positioned in the open configuration to allow the passage of the processing fluid from the source to the filter 28.
The filter 28 is equipped with a respective opening and closing valve "V4" which is opened during the operations for washing the filter 28 to allow discharge of the water.
It should be noted that the valve "V6" is of particular effectiveness, once the filter 28 has been cleaned, for restarting the pump 27.
In this sense, the valve "V6" is positioned in the closed position of the delivery branch 29 to restore the pressure to the supply circuit of 25.
During the operating conditions of the device 1 the valve "V4" is closed. The device 1 comprises means 32 for heating the processing fluid contained in the tank 5.
A control unit 33 is configured for controlling the activation of the heating means 32 until reaching a predetermined temperature, which can be set in the control unit 33.
Preferably, the processing fluid contained in the tank 5 is heated until reaching a temperature range of between 30°C and 90°C.
Preferably, the processing fluid contained in the tank 5 is heated until reaching a temperature range of between 36°C and 40°C.
The activation of the heating means 32 is a function of the temperature of the gaseous fluid in the inlet duct 3.
More specifically, if the temperature of the gaseous fluid in the inlet duct 3 is less than a predetermined temperature value, preferably below 100°C, the heating means 32 should be actuated.
The control unit 33 is configured for controlling the activation of the fan 34. The control unit 33 is configured for setting the rotation speed of the fan
34.
Optionally, the device 1 comprises means 35 for supplying a deodorising substance inside the tank 5.
The supply means 35 comprise a tank 36 for containing the deodorising substance and a supply pipe 37 which conveys the deodorising substance from the tank 36 inside the tank 5. The cover 6 of the tank 5 has a suitable passage, not illustrated, for the supply duct 37.
Preferably, the pipe 37 for supplying the deodorising substance leads close to the pipes 17 close to the inlet duct 3.
The dose of the deodorising substance to be picked from the tank 36 is determined by a pulse electronic control unit 38.
The control unit 33 is configured for controlling the activation of the pulse electronic control unit 38.
During the operation of the device 1 , the continuous action of the dispensing means 16 allows the processing in the tank 5 of the gaseous fluid introduced from the inlet duct 3 during its path towards the outlet duct 5.
The fan 34 of the outlet duct 4 defines a means for sucking gaseous fluid from the tank 5 towards the outside of it.
During the path which the gaseous fluid follows from the outlet of the inlet duct 3 to the inlet of the outlet duct 4, the solid particles present in it and chemical substances, partly or totally, which are considered harmful for human health are removed, thus emitting into the atmosphere a processed gaseous fluid which is less harmful than the gaseous fluid not processed by the device 1 .
Moreover, the gaseous fluid processed introduced into the atmosphere has a temperature lower than the temperature of the gaseous fluid not processed.
More specifically, it has been found that, after the combustion of wood, unprocessed gaseous fluid present in the inlet duct 3 has a temperature of approximately 140°C and the processed gaseous fluid present in the outlet duct 4 has a temperature of approximately 40°C.
In this regard, the outlet duct 4 comprises a condensate collector, not illustrated, of the gaseous fluid processed.
Lastly, it should be noted that during the operation of the device 1 , the processing fluid which is used by the delivery means 16 is processing fluid contained in the tank 5 mixed with the substances separated from the processing fluid to the gaseous fluid to be processed, which in terms of chemical properties will no longer be comparable with the processing fluid introduced into the tank 5 before use of the device 1 .
In this sense, the filter 28 of the supply circuit 25 makes it possible to retain some or part of the pollutant substances extracted from the gaseous fluid which are not to be introduced again into the tank 5.
From here it may be understood that it is necessary to renew the processing fluid inside the tank 5 if it is saturated with pollutant agents, and to carry out a regular cleaning.
Advantageously, it has been found in use that the device 1 according to the invention is able to reduce the content of dust present in the gaseous fluid to be processed by 100% and to reduce some substances harmful for human health if present in the gaseous fluid by 100%, such as, for example, carbon monoxide and some organic compounds produced by the combustion.
For some substances which are harmful for human health, such as, for example, nitrogen oxides and their mixtures and hydrogen sulphide, a degree of reduction of more than 50% has been found.
The device 1 has been subjected to a first step of monitoring dust and fumes resulting from the combustion of European Hop Hornbeam upstream and downstream of the device 1 and to a second step of monitoring the combustion fumes from aromatic substances, for example olive residues, by means of an automatic analyser for checking odour reduction (or rather, the VOCs).
In order to carry out the first monitoring step, wood certified as European Hop Hornbeam, which is a wood typically used in pizzerias, has been burnt in an oven.
The wood was burnt for a few seconds and the flames were left to stabilise themselves. Lastly, the sampling system with a 0.2 μιη porosity filter was connected immediately at the outlet of the oven and immediately after the outlet of the device 1 .
The results of the sampling are shown in Table 1 .
In the same fraction of time and with the same fraction of European Hop Hornbeam being burnt, the gases flowing out upstream and downstream of the device 1 were monitored using a portable Land-Lancom analysing device.
During the second monitoring step, the fire was re-lit using olive residue as fuel, a type of aromatic wood, and the VOCs (volatile organic compounds) were monitored with an automatic PID analyser, model Corvus-lon Science.
Table 1 shows the results of the total dusts before and after, that is to say, upstream and downstream, of the device 1 .
Upstream of the device 1 , close to the combustion path, the outlet duct with a circular diameter of 250 mm, the air flow rate, measured with a Pitot tube, was 248 m3/h at a flow speed of 3.75 m/s. On the other hand, downstream of the device 1 , the outlet duct 3, with an 80 mm circular diameter, the measurements with a Pitot tube have shown an average flow rate of 200 m3/h and a flow speed of 12 m/s.
After the sampling of the dusts, the fumes were analysed both upstream and downstream of the device 1 . The concentrations measured by means of the automatic analyser are shown in Table 2. Concentration in ppm
CO upstream CO downstream CxHy upstream CxHy downstream
1195 217 1224 288
1226 217 1228 297
1330 223 1383 305
1464 228 1479 342
1625 228 1534 361
The last phase of the study was aimed specifically at the monitoring of VOCs upstream and downstream of the device 1 .
Table 3 shows the results, in total concentrations (expressed in ppm), of the sampling operations performed.
VOCs eonce nlratton i ran
VOCs upstream VOCs downstream
15.5 1.923
31.62 1.746
23.86 11.79
6.588 9.396
4.812 8.62
3.888 2.252
Table 3 - concentration in ppm of VOCs during combustion of olive residues in an oven with reduction system The monitoring performed during this study has shown that:
1 . the prototype has a reduction efficiency greater than 100% for the total dusts;
2. the prototype has a reduction efficiency of 50% for NOx and H2S, whilst for carbon monoxide and organic compounds CxHy (saturated and unsaturated hydrocarbons) it is greater than 100%;
3. the prototype has a 100% efficiency for reducing the odours (VOCs). Overall, the device 1 has an excellent efficient in reducing pollutants from combustion.

Claims

1 . A device for reducing fumes, dust and odours of a gaseous fluid comprising an inlet duct (3) of the gaseous fluid to be processed and an outlet duct (4) of the gaseous fluid processed by the device (1 );
a closed tank (5) for processing the gaseous fluid; the inlet duct (3) being in communication with the tank (5) by means of an inlet opening (3a) and the outlet duct (4) being in communication with the tank (5) through an outlet opening (4a);
a hydraulic system (7) for conveying processing fluid entering and leaving the tank (5);
a hydraulic system (7) for conveying a processing fluid entering and leaving the tank (5) comprising means (16) for dispensing the nebulised processing fluid positioned inside the tank (5) at a height which is greater than the inlet opening (3a) of the inlet duct (3) of the tank and the outlet opening (4a) of the outlet duct (4);
during the path of the gaseous fluid in the tank (5) from the inlet opening (3a) of the inlet duct (3) to the outlet opening (4a) of the outlet duct (4), the dispensing means (16) are configured for continuously dispensing nebulised processing fluid on the gaseous fluid.
2. The device according to claim 1 , characterised in that the hydraulic system (7) comprises a plurality of pipes (17) for conveying the processing fluid to the respective dispensing means (16); the pipes (17) for conveying the processing fluid to the dispensing means (16) are positioned parallel to one another and to the side walls (5c, 5d) of the tank (5) where the inlet opening (3a) of the inlet duct (3) and the outlet opening (5a) of the outlet duct (5) are located; at least one pipe (19) comprises the dispensing means (16) oriented in such a way as to direct the flow of the processing fluid towards the inlet opening (3a) of the inlet duct (3).
3. The device according to claim 1 or 2, characterised in that the tank (5) comprises at least one panel (24) for separating two pipes (17) arranged successive to each other; at least one pipe (21 ) comprises the dispensing means (16) oriented in such a way as to direct the flow of the processing fluid towards the panel (24).
4. The device according to any one of the preceding claims, characterised in that the hydraulic system (7) comprises a circuit (25) for supplying the dispensing means (16) configured for drawing the processing fluid contained inside the tank (5) and conveying it to the dispensing means (16) defining a recirculation inside the device (1 ).
5. The device according to claim 4, characterised in that the circuit (25) for supplying the dispensing means (16) comprises a branch (26) for extracting the contents of the tank (5), located preferably in the proximity of the bottom wall (5e) of the tank (5), a pump (27) for sucking the processing fluid and a filter (28) for purifying water, positioned upstream of the pump (27), with reference to the direction of circulation of the processing fluid inside the extraction branch (26); downstream of the pump (27) the supply circuit (25) comprises a delivery branch (29) for conveying the processing fluid extracted from the tank (5) to the pipes (17) for conveying the dispensing means (16); a pressure switch (30) is positioned downstream of the pump (27) with reference to the direction of circulation of the processing fluid inside the delivery branch (29).
6. The device according to any one of the preceding claims, characterised in that the hydraulic system (7) comprises at least one branch (1 1 ) for supplying the processing fluid in the tank (5) configured to be connected to a source (12) for supplying the processing fluid; a shutter (13) of the supply branch (1 1 ) is configured to be controlled by activating means (14) once the predetermined maximum level of filling the tank (5) is reached.
7. The device according to claim 6, characterised in that the hydraulic system (7) comprises a connecting branch (31 ) of the supply branch (1 1 ) of the tank (5) with the supply circuit (25) of the dispensing means (16); the connecting branch (31 ) comprises a respective valve (V2) for opening and closing to enable or prevent the passage of the processing fluid from the supply branch (1 1 ) to the extraction branch (26).
8. The device according to any one of the preceding claims, characterised in that the hydraulic system (7) comprises a branch (15) for discharging the contents of the tank (5).
9. The device according to any one of the preceding claims, characterised in that it comprises means (32) for heating the processing fluid contained in the tank (5).
10. The device according to any one of the preceding claims, characterised in that the outlet duct (4) comprises suction means (34) for introducing the processed gaseous fluid into the atmosphere.
1 1 . The device according to claim 9 or 10, characterised in that it comprises a control unit (33) configured at least for controlling the activation of the heating means (32) until reaching a predetermined temperature, and for controlling the activation of the suction means (34).
12. The device according to any one of the preceding claims, characterised in that it comprises movement means (2) which allow the device (1 ) to be positioned in a suitable installation place or site.
13. The device according to any one of the preceding claims, characterised in that it comprises means (35) for supplying a deodorising substance inside the tank (5).
EP18759176.3A 2017-08-04 2018-08-01 Device for reducing fumes, dust and odours of a gaseous fluid Pending EP3661626A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000090652A IT201700090652A1 (en) 2017-08-04 2017-08-04 SMOOTHING DEVICE OF FUMES, DUST AND SMELLS OF AN AERIFORM FLUID.
PCT/IB2018/055768 WO2019025991A1 (en) 2017-08-04 2018-08-01 Device for reducing fumes, dust and odours of a gaseous fluid

Publications (1)

Publication Number Publication Date
EP3661626A1 true EP3661626A1 (en) 2020-06-10

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EP18759176.3A Pending EP3661626A1 (en) 2017-08-04 2018-08-01 Device for reducing fumes, dust and odours of a gaseous fluid

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EP (1) EP3661626A1 (en)
IT (1) IT201700090652A1 (en)
WO (1) WO2019025991A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3109894B1 (en) * 2020-05-07 2022-05-27 Alstom Transp Tech Particle collection device and vehicle fitted with such a device
WO2024105532A1 (en) * 2022-11-14 2024-05-23 Solidea S.R.L. Apparatus for drawing and treating organic fumes

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US3465504A (en) * 1967-10-26 1969-09-09 Esther Oropeza Air purifier device
US4039307A (en) * 1976-02-13 1977-08-02 Envirotech Corporation Countercurrent flow horizontal spray absorber
AT376583B (en) * 1983-04-01 1984-12-10 Foidl Leonhard DEVICE FOR TREATING COMBUSTION GAS FROM COMBUSTION PLANTS
US4609386A (en) * 1984-01-27 1986-09-02 Sibley John R Pulsating flow scrubber attachment
US5876662A (en) * 1991-10-28 1999-03-02 Us Filter/Rj Environmental, Inc. Odor control system
GB2280862B (en) * 1991-10-28 1996-02-14 Rj Environmental Inc Emergency scrubbing system
JPH07279648A (en) * 1994-04-05 1995-10-27 Isao Yamamoto Exhaust emission control system
WO2013085099A1 (en) * 2011-12-09 2013-06-13 진우통상(주) Odour-scrubbing device using liquid aqueous ozone generator
US20160288040A1 (en) * 2015-04-02 2016-10-06 Bio Clean Air Innovation Ltd Air purification system and method with biological treatment of a scrubber liquid

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IT201700090652A1 (en) 2019-02-04

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