EP2486355A2 - An energy recovery apparatus suitable for heat treatment of fluids or solids - Google Patents

An energy recovery apparatus suitable for heat treatment of fluids or solids

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Publication number
EP2486355A2
EP2486355A2 EP10774010A EP10774010A EP2486355A2 EP 2486355 A2 EP2486355 A2 EP 2486355A2 EP 10774010 A EP10774010 A EP 10774010A EP 10774010 A EP10774010 A EP 10774010A EP 2486355 A2 EP2486355 A2 EP 2486355A2
Authority
EP
European Patent Office
Prior art keywords
fluid
chamber
fluids
solids
solid
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.)
Granted
Application number
EP10774010A
Other languages
German (de)
French (fr)
Other versions
EP2486355B1 (en
Inventor
Giuseppe Faslivi
Medardo Pinti
Maria Llaria Pistelli
Vittorio Ratto
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.)
Rina Consulting Centro Sviluppo Materiali SpA
Original Assignee
Centro Sviluppo Materiali SpA
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 Centro Sviluppo Materiali SpA filed Critical Centro Sviluppo Materiali SpA
Publication of EP2486355A2 publication Critical patent/EP2486355A2/en
Application granted granted Critical
Publication of EP2486355B1 publication Critical patent/EP2486355B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00—Heat-exchange apparatus employing moving conduits
    • F28D11/02—Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0045—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for granular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases

Definitions

  • the present invention refers to the technological sector of the thermal treatment and efficientlysation of solid or fluid materials, polluted or not polluted, such as gases, vapours, liquids, soils, rocks, sludges and industrial or civil wastes.
  • the mechanical way normally has problems of both constructive difficulties and of plant dimensions
  • the chemical way could involve in additional problems tied to the use of chemical components that can generate chemical products having difficult environmental disposal.
  • the biological way generally acts with time that often do not correspond to the industrial necessities, and thus presents limitations in the application.
  • the thermal way presents plant complexity problems and efficiency problems.
  • the present invention intends to propose an energy recovery apparatus suitable for the thermal treatment of materials and able to solve state-of-art problems, in particular giving a simple plant solution, with high yield, high thermal exchange rate, reduced dimensions, to be used also locally on-site near the same areas where the polluted material to be treated has been generated.
  • This proposal of plant solution permits both to heat a fluid by subsequent application and to rapidly remove heat from a fluid or from a plant zone in order to obtain a quick cooling of the affected zone, thus avoiding the continuation of not desired chemical reactions, favoured by high temperature values, such as the ones that brings to dioxins formation.
  • an energy recovery apparatus suitable for thermal treating fluids or solids comprising:
  • first containment chamber (2) for the containment of a first fluid, possibly provided with a deflector (2') that develops itself in its interior substantially for all its length giving it the form of a first hollow annulus (or first interspace) (2");
  • thermal exchange means for thermal exchange (3) between the first fluid and the second fluid or a solid comprising a second hollow annulus (or second interspace) placed in contact, externally or internally, with said containment chamber (2) of the first fluid and having parallel longitudinal symmetry axis preferably coinciding with the longitudinal symmetry axis of said containment chamber (2), said second hollow annulus being suitable for containing conduits that extend over at least one of the external wall of the containment chamber (2), in helicoidal form or in linear form with longitudinal symmetry axis parallel to the longitudinal symmetry axis of said containment chamber, which are suitable for making the second fluid flow, between entrance and exit, in equicurrent, in countercurrent or in equicurrent and countercurrent sequence with the circulation direction of the first fluid or the solid;
  • the means for the first fluid inflow being suitable for sending in equicurrent o in countercurrent with the circulation direction of the second fluid or of the solid.
  • the containment chamber (2) suitable for making circulate fluids within itself is substantially cylindrical, or prismatic, and with longitudinal axis eventually incident with an horizontal axis.
  • the second hollow annulus is circular or polygonal and preferably forms the external wall of the containment chamber (2).
  • the means for the inflow and outflow of the first fluid comprise connections preferably realised, as the containment means (2) and the heat exchange means, in metallic material resistant to high temperature.
  • the means for the treatment of fluid emissions include at least a filter or a deduster or a cyclone.
  • the apparatus (1) can comprise:
  • a second chamber (5) suitable for making circulate inside solids, which is substantially cylindrical, placed externally to said first containment chamber (2) and suitable to rotate around its longitudinal symmetry axis that is preferably parallel or coincident with the longitudinal axis of the first chamber (2) and forming an interspace (6) with the external wall of the first chamber (2);
  • the means for the inflow of solid material are selected from the group containing cochlea, conveyer belt, pneumatic injectors.
  • the longitudinal symmetry axis of the second chamber (5) is preferably incident with respect to an horizontal axis of an angle ranging between 0° and 2.5°.
  • the means of the inflow of the solid material include at least a gravity system.
  • the apparatus according to the invention can be used for the energy recovery associated to the thermal treatment of fluids or solids, wherein the cooling rate of the first fluid is in the range of 250°C/s to 3000°C/s, preferably larger than 300°C/s.
  • the use can provide that a fluid with high thermal exchange capacity of flows in the helicoidal form ducts.
  • This fluid with high capacity of thermal exchange can be a diathermic oil.
  • the apparatus in which the first fluid, comprising fumes from the post-combustion chamber or from the combustion of traditional combustibles, is introduced at linear flow-rate in the range of 15m/s to 50m/s, preferably 35-45m/s, and exit at a temperature value lower than 250°C.
  • the apparatus of the invention can be used in situations where solid materials, submitted under thermal treatment, polluted and not polluted, include industrial and civil sludges, industrial soils, rocks, mixture of sable and material of organic matrix such as paper, plastic and sewage.
  • the temperature in the interspace between the first and the second chamber can be in the range of 200° to 1000°C.
  • the rotation rate of the second chamber (5) is in the range of 1 to 20 rpm.
  • the use of the apparatus in this case, can provide that the flowrate of the solid material to be treated is in the range of 50 to 5000 Kg/h, its permanence time is between 10 and 180 min and its dimension is between 0,1 and 50 mm.
  • Figure 1 schematically represents the longitudinal section of an embodiment of the apparatus according to the invention suitable for the fluid treatment.
  • Figure 2 schematically represents the longitudinal section of an embodiment of the apparatus according to the invention suitable for the solid treatment.
  • the apparatus (1) proposed by the present invention, provides for its use a first hot fluid, generated for example by effluents post-combustion, coming from thermal treatment of organic material matrix (polluted and not), or generated by the combustion of traditional combustibles.
  • This fluid is conveyed, through inlet connectors, to a containment chamber (2) where a deflector (2') of elongated form creates an interspace (first hollow annulus) (2") and from where, subsequently, it flows out through exit link pipes.
  • the external wall of the containment chamber (2) is realized using high thermal exchange elements (3) realized thanks to a hollow annulus constituted by helicoidal or longitudinal conducts inside which circulates a second fluid, that, in the proposed solution, is a diathermic oil.
  • a second fluid that, in the proposed solution, is a diathermic oil.
  • the hot fumes are introduced from the outside and, circulating in the chamber (2), lick the internal wall of the hollow annulus. They are rapidly cooled thanks to the action of the diathermic oil that circulates in countercurrent. The fumes, thus cooled, are subsequently emitted outside.
  • the inlet and exit of the first and second fluid are indicated, but not referenced, in the figure.
  • the apparatus (1) proposed by the present invention, provides, for its use, the inlet of the solid material to be treated, by means of a hopper (4) from where, subsequently, it goes in a rotating chamber (5).
  • a containment chamber (2) is positioned, that, as in figure 1 , assumes the form of an interspace (second hollow annulus) by means of a deflector, and in which inside hot fumes are made circulating which have been obtained by post-combustion or traditional combustibles.
  • the material to be treated is moved by means of the contact with the internal wall of the rotating chamber (5) and thermally treated, thanks to the thermal support mainly provided by the irradiation of the external wall of the chamber containing the fumes (2) and the conduction of the internal wall of the rotating chamber (5). Afterwards, the material is externally conducted by the suitable emission way (7).
  • the apparatus according to the invention is utilised only in the part concerning the thermal exchange with the active use of the annulus containing a spiral-form duct, inside which the diathermic oil circulates.
  • the fluid to be cooled is represented by the off-gases at the exit of an electric furnace, containing dioxins precursors (general name of poly- chlorate organic compounds, highly toxic, that present in the molecular structure duple bonds conjugated between carbon atoms).
  • dioxins precursors generally name of poly- chlorate organic compounds, highly toxic, that present in the molecular structure duple bonds conjugated between carbon atoms.
  • the inlet fume flow- rate is equal to 80000 Nm 3 /h at an inlet temperature value of 600°C with a linear flow-rate 30 m/s.
  • the temperature value of the fume will be lower than 250°C thanks to the action of the thermal exchange of the oil that, after the contact with the off-gases, undergoes a temperature increase of about 100°C.
  • Sludges (300 kg/h) of civil origin have been fed into the rotating chamber and have been treated by thermal way in order to dehydrate them and reduce the volume by means of fumes with a temperature value of 800°C at the inlet and 550°C at the exit and at a temperature of the internal wall of the rotating chamber equal to 400°C and at a temperature of the interspace equal to 450°C.
  • the rotating rate of the rotating drum has been of 9 rpm.
  • the permanence time of the civil sludge to be treated has been of 50 min.
  • the rotating rate of the rotating drum has been of 9 rpm.
  • the permanence time of the mixture to be treated has been of 40 min.
  • the rotating rate of the rotating drum has been of 12 rpm.
  • the permanence time of the material to be treated has been of 30 min ⁇
  • the rotating rate of the rotating drum has been of 10 rpm.
  • the permanence time of the material to be treated has been of 30 min.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Sludge (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Subject-matter of the present invention is an energy recovery apparatus and its use for the thermal treatment and the valorisation of a solid or fluid material, even polluted. Figure 1 shows the longitudinal section of an embodiment of the apparatus (1) according to the present invention suitable for the treatment of fluids, whereby a first hot fluid is conveyed through inlet connectors to a containment chamber (2), where a deflector (21) of elongated form creates an interspace (21 ') and heat exchange elements (3) are used to circulate a second fluid. In another embodiment, heat exchange takes place with a solid being conveyed through a rotating chamber (5).

Description

AN ENERGY RECOVERY APPARATUS SUITABLE FOR HEAT TREATMENT
OF FLUIDS OR SOLIDS
The present invention refers to the technological sector of the thermal treatment and valorisation of solid or fluid materials, polluted or not polluted, such as gases, vapours, liquids, soils, rocks, sludges and industrial or civil wastes.
In the state-of-art, for the treatment of solid or fluid materials, polluted or not polluted, different technologies are well known: chemical, biological, thermal ones and their combination.
For polluted materials, the mechanical way normally has problems of both constructive difficulties and of plant dimensions, the chemical way could involve in additional problems tied to the use of chemical components that can generate chemical products having difficult environmental disposal. The biological way generally acts with time that often do not correspond to the industrial necessities, and thus presents limitations in the application. The thermal way presents plant complexity problems and efficiency problems.
In general, therefore, the solutions proposed and known by the state- of-art still have a lot of not solved problems such as plant complexity, chemical components dangerousness, long operative times, low flexibility.
In the state-of-art, for the thermal recovery different technologies are known such as heat exchangers of different kinds (concentric pipe, pipe-in- pipe, finned pipes, plates types, etc.).
However, still now the known solutions present numerous problems related to not desired and difficult-to-control chemical reactions, materials flows containing corrosive substances and/or powder formation during the treatment. These are events that could imply obstructions of parts of treatment apparatus, low rates of thermal exchange, elevated dimensions, and, also in this case, low flexibility.
The present invention intends to propose an energy recovery apparatus suitable for the thermal treatment of materials and able to solve state-of-art problems, in particular giving a simple plant solution, with high yield, high thermal exchange rate, reduced dimensions, to be used also locally on-site near the same areas where the polluted material to be treated has been generated.
This proposal of plant solution, concerning the energy recovery, permits both to heat a fluid by subsequent application and to rapidly remove heat from a fluid or from a plant zone in order to obtain a quick cooling of the affected zone, thus avoiding the continuation of not desired chemical reactions, favoured by high temperature values, such as the ones that brings to dioxins formation.
It is subject-matter of the present invention an energy recovery apparatus suitable for thermal treating fluids or solids, comprising:
- means for the first fluid inflow;
- a first containment chamber (2) for the containment of a first fluid, possibly provided with a deflector (2') that develops itself in its interior substantially for all its length giving it the form of a first hollow annulus (or first interspace) (2");
- thermal exchange means for thermal exchange (3) between the first fluid and the second fluid or a solid, comprising a second hollow annulus (or second interspace) placed in contact, externally or internally, with said containment chamber (2) of the first fluid and having parallel longitudinal symmetry axis preferably coinciding with the longitudinal symmetry axis of said containment chamber (2), said second hollow annulus being suitable for containing conduits that extend over at least one of the external wall of the containment chamber (2), in helicoidal form or in linear form with longitudinal symmetry axis parallel to the longitudinal symmetry axis of said containment chamber, which are suitable for making the second fluid flow, between entrance and exit, in equicurrent, in countercurrent or in equicurrent and countercurrent sequence with the circulation direction of the first fluid or the solid;
- means for the first fluid inflow;
- possible means for the treatment of emitted fluids or solids;
the means for the first fluid inflow being suitable for sending in equicurrent o in countercurrent with the circulation direction of the second fluid or of the solid.
The containment chamber (2) suitable for making circulate fluids within itself is substantially cylindrical, or prismatic, and with longitudinal axis eventually incident with an horizontal axis.
The second hollow annulus is circular or polygonal and preferably forms the external wall of the containment chamber (2).
The means for the inflow and outflow of the first fluid comprise connections preferably realised, as the containment means (2) and the heat exchange means, in metallic material resistant to high temperature.
The means for the treatment of fluid emissions include at least a filter or a deduster or a cyclone.
Besides, the apparatus (1) can comprise:
- means for the inflow (4) of solids to be treated; - a second chamber (5), suitable for making circulate inside solids, which is substantially cylindrical, placed externally to said first containment chamber (2) and suitable to rotate around its longitudinal symmetry axis that is preferably parallel or coincident with the longitudinal axis of the first chamber (2) and forming an interspace (6) with the external wall of the first chamber (2);
- means for the emission (7) of treated solid material.
In an embodiment of the apparatus for the treatment of solids, the means for the inflow of solid material are selected from the group containing cochlea, conveyer belt, pneumatic injectors.
In another embodiment of this apparatus, the longitudinal symmetry axis of the second chamber (5) is preferably incident with respect to an horizontal axis of an angle ranging between 0° and 2.5°.
In a further embodiment of the apparatus, the means of the inflow of the solid material include at least a gravity system.
It is further subject-matter a multi-modular apparatus for energy recovery, suitable for the thermal treatment of fluids and solids, with modules in series or in parallel, wherein each module is composed by the previously described apparatus in a mono-modular form.
The apparatus according to the invention can be used for the energy recovery associated to the thermal treatment of fluids or solids, wherein the cooling rate of the first fluid is in the range of 250°C/s to 3000°C/s, preferably larger than 300°C/s.
The use can provide that a fluid with high thermal exchange capacity of flows in the helicoidal form ducts.
This fluid with high capacity of thermal exchange can be a diathermic oil.
It is also provided according to the invention the use of the apparatus, in which the first fluid, comprising fumes from the post-combustion chamber or from the combustion of traditional combustibles, is introduced at linear flow-rate in the range of 15m/s to 50m/s, preferably 35-45m/s, and exit at a temperature value lower than 250°C.
The apparatus of the invention can be used in situations where solid materials, submitted under thermal treatment, polluted and not polluted, include industrial and civil sludges, industrial soils, rocks, mixture of sable and material of organic matrix such as paper, plastic and sewage.
During the use of the apparatus, that is subject-matter of the present invention, the temperature in the interspace between the first and the second chamber can be in the range of 200° to 1000°C. During the use for the treatment of solids, the rotation rate of the second chamber (5) is in the range of 1 to 20 rpm.
The use of the apparatus, in this case, can provide that the flowrate of the solid material to be treated is in the range of 50 to 5000 Kg/h, its permanence time is between 10 and 180 min and its dimension is between 0,1 and 50 mm.
The present invention will be deeper explained by the description of its embodiments, provided by way of illustration but not by way of limitation, with the help of the following figures.
Figure 1 schematically represents the longitudinal section of an embodiment of the apparatus according to the invention suitable for the fluid treatment.
Figure 2 schematically represents the longitudinal section of an embodiment of the apparatus according to the invention suitable for the solid treatment.
Referring to figure 1 , the apparatus (1), proposed by the present invention, provides for its use a first hot fluid, generated for example by effluents post-combustion, coming from thermal treatment of organic material matrix (polluted and not), or generated by the combustion of traditional combustibles. This fluid is conveyed, through inlet connectors, to a containment chamber (2) where a deflector (2') of elongated form creates an interspace (first hollow annulus) (2") and from where, subsequently, it flows out through exit link pipes. The external wall of the containment chamber (2) is realized using high thermal exchange elements (3) realized thanks to a hollow annulus constituted by helicoidal or longitudinal conducts inside which circulates a second fluid, that, in the proposed solution, is a diathermic oil. During the running, the hot fumes are introduced from the outside and, circulating in the chamber (2), lick the internal wall of the hollow annulus. They are rapidly cooled thanks to the action of the diathermic oil that circulates in countercurrent. The fumes, thus cooled, are subsequently emitted outside. The inlet and exit of the first and second fluid are indicated, but not referenced, in the figure.
Referring to figure 2, the apparatus (1), proposed by the present invention, provides, for its use, the inlet of the solid material to be treated, by means of a hopper (4) from where, subsequently, it goes in a rotating chamber (5). Inside this rotating chamber (5) a containment chamber (2) is positioned, that, as in figure 1 , assumes the form of an interspace (second hollow annulus) by means of a deflector, and in which inside hot fumes are made circulating which have been obtained by post-combustion or traditional combustibles. In the interspace (6) between the external chamber (2) and the chamber (5), the material to be treated is moved by means of the contact with the internal wall of the rotating chamber (5) and thermally treated, thanks to the thermal support mainly provided by the irradiation of the external wall of the chamber containing the fumes (2) and the conduction of the internal wall of the rotating chamber (5). Afterwards, the material is externally conducted by the suitable emission way (7).
In accordance with the subject-matter of the present invention, some embodiments of itself are illustrated in the following.
Example 1
For this embodiment, the apparatus according to the invention is utilised only in the part concerning the thermal exchange with the active use of the annulus containing a spiral-form duct, inside which the diathermic oil circulates.
The fluid to be cooled is represented by the off-gases at the exit of an electric furnace, containing dioxins precursors (general name of poly- chlorate organic compounds, highly toxic, that present in the molecular structure duple bonds conjugated between carbon atoms). The inlet fume flow- rate is equal to 80000 Nm3/h at an inlet temperature value of 600°C with a linear flow-rate 30 m/s. At the exit, the temperature value of the fume will be lower than 250°C thanks to the action of the thermal exchange of the oil that, after the contact with the off-gases, undergoes a temperature increase of about 100°C. In this manner, it is possible to simultaneously obtain a fluid at high temperature, that can be used as an additional energetic source, and a cooling rate of the fumes higher than 300°C/s (quencher), such that the realisation of a dangerous situation of the dioxin synthesis (De Novo) is avoided.
Example 2
Sludges (300 kg/h) of civil origin have been fed into the rotating chamber and have been treated by thermal way in order to dehydrate them and reduce the volume by means of fumes with a temperature value of 800°C at the inlet and 550°C at the exit and at a temperature of the internal wall of the rotating chamber equal to 400°C and at a temperature of the interspace equal to 450°C.
The rotating rate of the rotating drum has been of 9 rpm. The permanence time of the civil sludge to be treated has been of 50 min.
Example 3
It has been fed into the rotating chamber, by means of a belt conveyer, a mixture of sand (40%), paper (20%), cartoon (20%) and plastic (20%) (100 kg/h) to be treated by thermal way with the aim of producing syngas and reduce its volume, using fumes at a temperature of 900°C at the inlet and of 700°C at the exit and at a temperature of the internal wall of the rotating chamber equal to 650°C and at a temperature of the interspace equal to 680°C.
The rotating rate of the rotating drum has been of 9 rpm.
The permanence time of the mixture to be treated has been of 40 min.
Example 4
It has been fed into the rotating chamber, having sloping axis of 1.5° with respect to the horizontal position, by means of a pneumatic injection system, polluted industrial soil (200 kg/h) containing dangerous organic materials (oils having 2% of poly-chloro-bis-phenils, PCB) that has been treated, with the aim of decontaminating it, using fumes at a temperature of 850°C at the inlet and of 600°C at the exit and at a temperature of the internal wall of the rotating chamber equal to 520°C and at a temperature of the interspace equal to 550°C and a temperature of treated material in exit of 450°C.
The rotating rate of the rotating drum has been of 12 rpm. The permanence time of the material to be treated has been of 30 min^
Example 5
It has been fed into the rotating chamber, having sloping axis of with respect to the horizontal position, by means of a belt conveyor injection system, calcareous rock (200 kg/h) that has been treated with the aim of transforming it in raw material, using fumes at a temperature of 600°C at the inlet and of 300°C at the exit and at a temperature of the internal wall of the rotating chamber equal to 400°C and at a temperature of the interspace equal to 450°C and a temperature of treated material in exit of 180°C. The so treated limestone can be used as inert material with bitumen for the production of asphalt.
The rotating rate of the rotating drum has been of 10 rpm.
The permanence time of the material to be treated has been of 30 min.

Claims

1. Energy recovery apparatus (1) suitable for the thermal treatment of fluids or solids, comprising:
- means for the first fluid inflow;
- a first containment chamber (2) for the containment of a first fluid, possibly provided with a deflector (2') that develops itself in its interior substantially for all its length giving it the form of a first hollow annulus (or first interspace) (2");
- thermal exchange means for thermal exchange (3) between the first fluid and the second fluid or a solid, comprising a second hollow annulus
(or second interspace) placed in contact, externally or internally, with said containment chamber (2) of the first fluid and having parallel longitudinal symmetry axis preferably coinciding with the longitudinal symmetry axis of said containment chamber (2), said second hollow annulus being suitable for containing conduits that extend over at least one of the external wall of the containment chamber (2), in helicoidal form or in linear form with longitudinal symmetry axis parallel to the longitudinal symmetry axis of said containment chamber, which are suitable for making the second fluid flow, between entrance and exit, in equicurrent, in countercurrent or in equicurrent and countercurrent sequence with the circulation direction of the first fluid or the solid;
- means for the first fluid inflow;
- possible means for the treatment of emitted fluids or solids;
the means for the first fluid inflow being suitable for sending in equicurrent o in countercurrent with the circulation direction of the second fluid or of the solid.
2. Apparatus (1) according to claim 1 , wherein said chamber (2) suitable for the circulation of fluids in its inside is substantially cylindrical, or prismatic and with a longitudinal axis possibly incident with horizontal axis.
3 Apparatus according to claim 2, wherein said second hollow annulus is circular or polygonal and preferably forms the external wall of the containment chamber (2).
4. Apparatus according to claim 1 , wherein said means for the inlet and the exit of the first fluid include connections preferably realised, such as the containment means (2) and the thermal exchange means, in metallic material resistant to high temperature.
5. Apparatus according to claim 1 , wherein said means for the treatment of the fluids emission include at least a filter or a deduster or a cyclone.
6. Apparatus (1) according to claim 1 , further comprising: - means for the inlet (4) of solids to be treated;
- a second chamber (5), suitable for circulating inside solids, substantially cylindrical, positioned externally to said first containment chamber (2), and which is suitable to rotate around its longitudinal symmetry axis preferably parallel or coincident with the longitudinal axis of the first chamber (2) and forming an interspace (6) with the external wall of the first chamber (2) ;
- means for the emission (7) of treated solid material.
7. Apparatus according to claim 6, wherein said means for the solid materials inlet are selected in the group comprising: cochlea, belt conveyor, pneumatic injectors.
8. Apparatus according to claim 6, wherein longitudinal symmetry axis of the second chamber (5) is preferably incident with respect to an horizontal axis with an angle between 0 and 2.5°.
9. Apparatus according to claim 6, wherein said means for the solid materials exit include at least a gravity system.
10. Energy recovery multi-modular apparatus , suitable for the thermal treatment of fluids o r solid s, with modules in series or in parallel, characterised in that each module is constituted by an apparatus according to claims 1 to 9.
11. Use of the apparatus according to any one of the previous claims
1 to 10, for the energy recovery associated to the thermal treatment of fluids or solids, wherein the cooling rate of the first fluid is in the range of 250°C/s to 3000°C/s, preferably it is higher than 300°C/s.
12. Use of the apparatus according to claim 11 , wherein in the helicoidal form ducts a fluid having high thermal exchange capacity circulates.
13. Use of the apparatus according to the previous claim, wherein the fluid at high thermal exchange capacity is a diathermic oil.
14. Use of the apparatus according to any claims 11 to 13, wherein the first fluid, including fumes from the post-combustion chamber or from the combustion of traditional combustibles, is inletted at a linear flow-rate in the range of 15m/s to 50m/s, preferably 35-45m/s, and exit at a temperature lower than 250°C.
15. Use of the apparatus according to claim 14, wherein the solid materials, submitted to the thermal treatment, polluted or not polluted, include industrial or civil sludges, industrial solids, rocks, mixtures of sand and materials having organic matrix such as paper, plastics, sewage.
16. Use of the apparatus according to any one claims 11 to 15, wherein the temperature in the interspace between the first and the second chamber is in the range of 200° to 1000°C.
17. Use of the apparatus according to any claimi 1 to 16, wherein the rotation rate of the second chamber (5) is in the range of 1 to 20 rpm.
18. Use of the apparatus according to any claim 11 to 17, wherein the flow of the solid material to be treated is in the range of 50 to 5000 Kg/h, its permanence time is in the range of 10 to 180 min and its dimension is in the range of 0,1 to 50 mm.
EP10774010.2A 2009-10-06 2010-10-06 An energy recovery apparatus suitable for heat treatment of fluids or solids Active EP2486355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM2009A000512A IT1396718B1 (en) 2009-10-06 2009-10-06 ENERGY RECOVERY SYSTEM AND ITS USE FOR THE THERMAL TREATMENT OF FLUIDS OR SOLIDS.
PCT/IT2010/000416 WO2011042927A2 (en) 2009-10-06 2010-10-06 An energy recovery apparatus suitable for heat treatment of fluids or solids

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EP2486355A2 true EP2486355A2 (en) 2012-08-15
EP2486355B1 EP2486355B1 (en) 2019-04-03

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EP (1) EP2486355B1 (en)
ES (1) ES2741585T3 (en)
IT (1) IT1396718B1 (en)
TR (1) TR201909962T4 (en)
WO (1) WO2011042927A2 (en)

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CN118424029B (en) * 2024-07-05 2024-09-06 常州旷达纺织科技发展有限公司 Waste heat recovery equipment is used in automobile fabric production

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US3787292A (en) * 1971-08-13 1974-01-22 E Keappler Apparatus for pyrolysis of wastes
DE8214949U1 (en) * 1982-05-22 1982-10-14 Dorst, Alois, 7801 Umkirch OIL HEATER
DE4202791A1 (en) * 1991-05-11 1992-11-12 Linder Rudolf Fa HEAT EXCHANGER FOR WASTEWATER LEADING PIPE OR HOSE PIPES
DE29903756U1 (en) * 1999-03-03 1999-07-01 hde Metallwerk GmbH, 58706 Menden Heat exchanger tube
US20030056944A1 (en) * 1999-09-23 2003-03-27 Joseph C. Ferraro External flue heat exchangers
FR2801098B1 (en) * 1999-11-12 2002-03-29 Rubis Concept HARVESTING HEAT EXCHANGER
JP2005098612A (en) * 2003-09-25 2005-04-14 Matsushita Electric Ind Co Ltd Heat exchanger and manufacturing method thereof
US7661460B1 (en) * 2003-12-18 2010-02-16 Advanced Thermal Sciences Corp. Heat exchangers for fluid media
CN100458284C (en) * 2005-12-15 2009-02-04 沈福昌 A complete set of equipment for incinerating waste
US8048583B2 (en) * 2006-07-20 2011-11-01 Modine Manufacturing Company Compact air preheater for solid oxide fuel cell systems
WO2008082967A1 (en) * 2006-12-26 2008-07-10 Nucor Corporation Pyrolyzer furnace apparatus and method for operation thereof

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See references of WO2011042927A2 *

Also Published As

Publication number Publication date
WO2011042927A2 (en) 2011-04-14
EP2486355B1 (en) 2019-04-03
WO2011042927A3 (en) 2012-01-05
ITRM20090512A1 (en) 2011-04-07
ES2741585T3 (en) 2020-02-11
IT1396718B1 (en) 2012-12-14
TR201909962T4 (en) 2019-08-21

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