EP1664651A1 - Pneumatische fördervorrichtung mit wärmetauscher - Google Patents
Pneumatische fördervorrichtung mit wärmetauscherInfo
- Publication number
- EP1664651A1 EP1664651A1 EP04787107A EP04787107A EP1664651A1 EP 1664651 A1 EP1664651 A1 EP 1664651A1 EP 04787107 A EP04787107 A EP 04787107A EP 04787107 A EP04787107 A EP 04787107A EP 1664651 A1 EP1664651 A1 EP 1664651A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pneumatic
- spiral
- heat transfer
- heat exchanger
- flow
- 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.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
-
- 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
Definitions
- the present invention relates to a pneumatic conveying device with a heat exchanger.
- Pneumatic conveying is the transport of a particulate solid into a gas stream through a pipe, also called a pneumatic conveying pipe. It is known to install a heat exchanger in a pneumatic delivery line in order to heat or cool a pneumatic delivery flow. However, it is also known that homogeneous heating / cooling of a pneumatic flow is not without problems.
- patent application WO 99/24773 it is proposed to enter the pneumatic flow into a loosening vessel in which the solid forms a fluidized bed. The loosening vessel is traversed by several vertical heat transfer tubes, which heat up the solid in the fluidized bed. The solid is continuously discharged at the upper end of the loosening vessel.
- Patent application FR 1,179,572 proposes dividing the flow of solids into a plurality of vertical pipes which cross a vessel through which a heat transfer medium flows.
- Various types of heat exchangers for heat exchange between liquids or between steam and liquid are also known. However, it is obvious to the person skilled in the art that such
- Solids offset liquids such as coal tar, pitch or Bitumen residues, known.
- the solids are separated off within the heat exchanger.
- a cylindrical channel of large cross section is provided in the interior of the heat exchanger, which opens into an annular channel of smaller cross section surrounding it.
- the liquid-solid mixture flows through the cylindrical channel at a low speed and then through the annular channel at an increased speed in the opposite direction.
- the liquid is largely freed of its solids in the annular channel. There it gives off heat to another heat-absorbing liquid, which is guided in spiral lines. Particle separation is thus achieved before the heat exchange by gravity, deflection and the speed difference.
- GB 791,843 describes a heat exchanger for heating oil using steam. This has a plurality of spiral pipes for the water vapor. The spiral pipes surround a central pipe to which they are connected in series. These are arranged in such a way that they almost touch each other, whereby a helical channel for the oil is formed around the central line within the heat exchanger. Such a heat exchanger is not suitable for a pneumatic flow, since it is susceptible to abrasion and the helical channel has an excessive flow resistance.
- DE 201 21 520 discloses a heat exchanger arrangement with a spiral sleeve for recovering heat from waste water.
- the arrangement comprises a one-piece outer housing with a core tube device arranged therein, which is surrounded by a spiral, heat-exchanging copper tube.
- Flow guide plates which lie between the windings of the copper pipe and on the outer housing and also serve for the helical guidance of the liquid flow Core tube device adjacent, spirally arranged.
- This heat exchanger is also designed for liquids and is not suitable for a pneumatic flow.
- An object of the present invention is to propose a pneumatic conveying device with a compact heat exchanger which ensures an improved heat exchange between a heat transfer medium and the pneumatic conveying flow. This object is achieved by a pneumatic conveyor device according to claim 1.
- a pneumatic conveying device according to the invention comprises a pneumatic conveying line in which a heat exchanger is installed.
- Heat exchanger has a cylindrical outer housing with a first
- a housing core is arranged within this cylindrical outer housing in such a way that it delimits an annular flow gap therein, which is separate from the pneumatic
- a first tube spiral is arranged in this annular flow gap and can be connected to a heat carrier distribution.
- the pneumatic flow flows in the annular flow gap around the first spiral tube, which is heated or cooled by a heat transfer medium. This is a relatively good and homogeneous one
- the heat transfer between the heat transfer medium and the pneumatic flow is further improved by arranging a second tube spiral, which can also be connected to a heat transfer medium, in the annular flow gap, the first and second tube spiral having different diameters and the windings of the first tube spiral being axially offset between the turns of the second Pipe spiral lie.
- the width B of the annular flow gap preferably corresponds to 2.5 times to 3 times the outside diameter of the tube from which the tube spirals are made.
- the housing core can be manufactured as a closed hollow body, the first tube spiral opening into this hollow body in such a way that the heat transfer medium flows through it.
- the second tube spiral if present, also advantageously opens into the. Hollow body, wherein the hollow body can have a common connection piece for a heat transfer return line.
- the housing core and the spiral tube (s) form a unit which is advantageously carried by a common flange which is fastened to one end of the outer housing.
- the housing core advantageously has a displacement body, which is arranged within the housing core in such a way that it defines an annular flow gap for the heat transfer medium. In this way, a more homogeneous temperature of the outer wall of the housing core is achieved.
- the heat exchanger can have an outer jacket which surrounds the outer housing in such a way that an annular heat carrier space is delimited around this outer housing.
- a heat exchanger according to the invention is particularly advantageously suitable for heating coal dust. The coal dust is fed through the heat exchanger as a pneumatic flow.
- Fig. 1 a longitudinal section through a heat exchanger in a pneumatic conveyor.
- the heat exchanger 10 shown in Fig. 1 was developed for a pneumatic coal dust conveyor system. It is intended to warm up the pneumatically conveyed coal dust as homogeneously as possible before the latter is blown into a blast furnace, for example.
- the arrow 12 indicates a pneumatic delivery line upstream and the arrow 14 a pneumatic delivery line downstream of the heat exchanger 10.
- the conveying lines according to arrows 12 and 14 are part of a pneumatic conveying device which is known per se and which, for simplification, is not shown overall.
- the heat exchanger 10 comprises a cylindrical, tubular outer housing 16 which is set up vertically.
- the reference numeral 18 consequently designates the lower end and the reference numeral 20 the upper end of the outer housing 16.
- Both ends 18, 20 are each closed with a flanged bottom 22, 24.
- the outer housing 16 has an inlet connector 26 and at its upper end 20 an outlet connector 28.
- the pneumatic delivery line 12 is connected to the inlet connection 26 and the pneumatic delivery line 14 to the outlet connection 28.
- the pneumatic delivery flow is consequently blown from the pneumatic delivery line 12 through the inlet connection 26 into a heat exchanger interior 30 inside the outer housing 16, flows through this heat exchanger interior 30 to the outlet connection 28 and is fed by the latter into the pneumatic delivery line 14.
- a housing core 32 is arranged in the heat exchanger interior 30 in such a way that it has an annular flow gap 34 for it delimits the pneumatic flow, which extends from the confluence of the inlet connector 26 to the confluence with the outlet connector 28.
- the housing core 32 is arranged coaxially with the cylindrical outer housing 16, so that the annular flow gap 34 has essentially the same width "B" everywhere.
- Two tubular spirals 36 and 38 are arranged in the annular flow gap 34.
- the first tube spiral 36 which is also referred to as the inner tube spiral 36, has a smaller spiral diameter than the second tube spiral 38, which is also referred to as the outer tube spiral 38.
- the turns of the first tube spiral 36 lie in the axial direction between the turns of the second tube spiral 38.
- the two tube spirals 36 and 38 are each made of a tube with an outer diameter D, the width B of the annular flow gap being approximately 2.5 ⁇ D.
- the upper end of the two pipe spirals 36 and 38 each lead into a connecting piece 40, 42.
- the two pipe spirals 36, 38 can be connected to a distributor network 44 of a heat transfer medium (for example a heat transfer oil).
- a heat transfer medium for example a heat transfer oil.
- the two pipe spirals 36 and 38 With their lower end 46, 48, the two pipe spirals 36 and 38 each open into the lower end of the housing core 32.
- the latter is designed as a closed, tubular hollow body and has an outlet connection 50 at its upper end. This outlet connection 50 is at one
- a displacement body 52 is arranged in the housing core 32 and delimits an annular flow gap 54 for the heat transfer medium within the housing core 32.
- the heat transfer medium is consequently introduced through the connecting pieces 40, 42 into the pipe spirals 36, 38, flows through these pipe spirals 36, 38, is introduced into the lower end of the housing core 32, flows in the housing core 32 through the annular flow gap 54, the outer wall of the housing core 32 is heated.
- the heat transfer medium is then fed into the return line 44 ′ via the outlet connection 50. initiated.
- the reference numeral 60 denotes an outer jacket which surrounds the outer housing 16 between the inlet connector 26 and the outlet connector 28 in such a way that an annular space 62 is delimited here around the outer housing 16.
- This annular space 62 is also connected to the heat transfer medium distribution network via an inlet connection 64 and an outlet connection 66, the heat transfer medium heating the outer wall of the outer housing 16 when flowing through the annular space 62.
- the pneumatic flow is directed essentially axially through the annular flow gap 34 and is heated in it by the two heated tube spirals 36, 38, the heated wall of the housing core 32 and the heated wall of the outer housing 16 before it passes over the heat exchanger 10 leaves the outlet port 28. It should be noted that the housing core 32 and the two
- Pipe spirals 36, 38 form a unit which is supported by a cylindrical ring flange 70.
- This cylindrical ring flange 70 which is arranged between the outer housing 16 and the upper dished end 24, the two connecting pieces 40, 42 and the outlet piece 50 are led out.
- the housing core 32 and the two tube spirals 36, 38 can consequently be very easily installed and removed as a unit together with their connecting pieces 40, 42, 50.
- Heating elements i.e. the tube spirals 36, 38 and the heated housing core 32
- Heating elements can be exchanged in the simplest way.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04787107A EP1664651A1 (de) | 2003-09-09 | 2004-09-07 | Pneumatische fördervorrichtung mit wärmetauscher |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03103329A EP1515106A1 (de) | 2003-09-09 | 2003-09-09 | Wärmeaustauscher für eine pneumatische Fördervorrichtung |
| EP04787107A EP1664651A1 (de) | 2003-09-09 | 2004-09-07 | Pneumatische fördervorrichtung mit wärmetauscher |
| PCT/EP2004/052074 WO2005024330A1 (de) | 2003-09-09 | 2004-09-07 | Pneumatische fördervorrichtung mit wärmetauscher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1664651A1 true EP1664651A1 (de) | 2006-06-07 |
Family
ID=34130326
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03103329A Withdrawn EP1515106A1 (de) | 2003-09-09 | 2003-09-09 | Wärmeaustauscher für eine pneumatische Fördervorrichtung |
| EP04787107A Withdrawn EP1664651A1 (de) | 2003-09-09 | 2004-09-07 | Pneumatische fördervorrichtung mit wärmetauscher |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03103329A Withdrawn EP1515106A1 (de) | 2003-09-09 | 2003-09-09 | Wärmeaustauscher für eine pneumatische Fördervorrichtung |
Country Status (2)
| Country | Link |
|---|---|
| EP (2) | EP1515106A1 (de) |
| WO (1) | WO2005024330A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB657079A (en) * | 1948-12-29 | 1951-09-12 | Yorkshire Tar Distillers Ltd | Improvements in and relating to heat exchangers for use in the recovery of sensible heat from liquors which deposit sediment |
| GB791843A (en) * | 1955-03-12 | 1958-03-12 | Ostbo Nils | Recuperative heat exchanger |
| DE19851997A1 (de) * | 1997-11-12 | 1999-05-20 | Thyssen Stahl Ag | Vorrichtung zum Wärmeaustausch zwischen einem Wärmeträgerfluid und einem Feststoff |
| DE20121520U1 (de) * | 2000-01-26 | 2003-02-27 | Huai Yin Hui Huang Tai Yang Neng You Xian Gong Si, Huai Yin, Jiang Su | Wärmetauscheranordnung mit Spiralmanschette |
-
2003
- 2003-09-09 EP EP03103329A patent/EP1515106A1/de not_active Withdrawn
-
2004
- 2004-09-07 EP EP04787107A patent/EP1664651A1/de not_active Withdrawn
- 2004-09-07 WO PCT/EP2004/052074 patent/WO2005024330A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2005024330A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1515106A1 (de) | 2005-03-16 |
| WO2005024330A1 (de) | 2005-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20051221 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE GB IT NL |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): AT DE GB IT NL |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GOEDERT, PAUL |
|
| 17Q | First examination report despatched |
Effective date: 20110624 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| INTG | Intention to grant announced |
Effective date: 20190103 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20190514 |