EP3587924B1 - Dispositif de transport pneumatique et dispositif de chauffage - Google Patents

Dispositif de transport pneumatique et dispositif de chauffage Download PDF

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Publication number
EP3587924B1
EP3587924B1 EP18179912.3A EP18179912A EP3587924B1 EP 3587924 B1 EP3587924 B1 EP 3587924B1 EP 18179912 A EP18179912 A EP 18179912A EP 3587924 B1 EP3587924 B1 EP 3587924B1
Authority
EP
European Patent Office
Prior art keywords
conveying
lines
conveyed
pneumatic
pneumatic conveying
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.)
Active
Application number
EP18179912.3A
Other languages
German (de)
English (en)
Other versions
EP3587924A1 (fr
Inventor
Johannes Bartusch
Christoph Blumenberg
Hans-Dieter Nolde
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.)
Claudius Peters Projects GmbH
Original Assignee
Claudius Peters Projects GmbH
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 Claudius Peters Projects GmbH filed Critical Claudius Peters Projects GmbH
Priority to DK18179912.3T priority Critical patent/DK3587924T3/da
Priority to EP18179912.3A priority patent/EP3587924B1/fr
Publication of EP3587924A1 publication Critical patent/EP3587924A1/fr
Application granted granted Critical
Publication of EP3587924B1 publication Critical patent/EP3587924B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00—Feeding arrangements
    • F23K2203/008—Feeding devices for pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2900/00—Special features of, or arrangements for fuel supplies
    • F23K2900/03001—Airlock sections in solid fuel supply lines

Definitions

  • the invention relates to a pneumatic conveying device and a heating device with a corresponding conveying device.
  • document DE 10 2011 083210 A1 on which the two-part form of claim 1 is based, relates to a solution for the pneumatic conveying of fine-grained solid fuels from a fluidized bed, whereby gas volumes are withdrawn on the way of conveying and thus the specific solids content in the gas-solid suspension is increased.
  • the conveying air can be used directly for the final combustion of the fuel by the burner.
  • the flame temperature in order to generate as few pollutants as possible, in particular as few nitrogen oxides (NOx) as possible, during combustion, it is generally preferred to limit the flame temperature. Since these i.a. is influenced by the amount of air used as the conveying gas, it is preferable to use as little conveying air as possible.
  • the object of the present invention is therefore to create a conveying device and a heating device in which the disadvantages known from the prior art no longer occur or only occur to a reduced extent.
  • the invention relates to a pneumatic conveying device for connection to a burner with a feed end, an output end and a conveyor gas feed for introducing conveyor gas in order to transport pneumatically conveyable material from the feed end to the output end, with at least two separate pneumatic conveying lines from the feed end to the output end for distributing the Conveyed material flow from the feed end to the output end are provided thereon, which are brought together at the output end to form a common outlet opening for connection to a burner.
  • the invention also relates to a heating device comprising a burner and a pneumatic conveying device for conveying fuel, the pneumatic conveying device being designed according to the invention and the burner being with it the common outlet opening of the pneumatic conveying device is connected.
  • the invention has recognized that the problem of dune formation can be effectively countered, particularly in the pneumatic conveying of suitable conveyed goods with a high conveyed goods throughput with a simultaneously low conveying gas volume, if the conveyed goods flow is not guided through a single conveying line, as is usual in the prior art, but is initially distributed over several conveying lines, in order then to be brought together again at the end point of the conveying - namely the outlet opening for connecting further components.
  • Pneumatic conveying lines are regularly designed for the expected flow of conveyed goods, which has a direct effect on their diameter.
  • a high conveying capacity usually also means a larger diameter of the conveying line.
  • the individual conveying lines are then brought together again at the output end of the conveying device so that there a individual flow of conveyed goods exits from a single common outlet opening of the conveyor device, so that the device according to the invention does not require any adaptation to the component to be connected to the output end compared to the prior art.
  • the number and / or conveying capacity of the several separate conveying lines is to be selected so that their total conveying capacity corresponds to the conveying capacity of a comparable singular conveying line from the prior art in order to be able to provide the desired conveying capacity.
  • the separate conveying lines in each case have a smaller diameter than a single conveying line with a comparable conveying capacity, whereby the undesired dune formation can already be reduced overall.
  • At least one solids sluice is provided at the end of the feed, which is connected to at least some of the separate conveying lines for feeding pneumatically conveyable material to be conveyed into the individual conveying lines. If only one solids sluice is provided, this is preferably connected to all of the conveying lines of the conveying device in order to distribute the conveyed material to all of the individual conveying lines. However, it is also possible that two or more solids sluices are provided in order to feed identical or different conveyed goods into the individual conveying lines. It is possible that a first solids sluice is permanently connected to a first part of the delivery lines, while another solids sluice is permanently connected to a further part of the delivery lines.
  • a solids lock comprises a solids distributor for uniform distribution of the pneumatically conveyable material to be conveyed to the conveying lines connected to it.
  • a corresponding solids distributor By means of a corresponding solids distributor, it can be ensured that exactly predeterminable, for example identical quantities of conveyed material are fed into all conveying lines connected to the solids distributor.
  • a corresponding solids distributor is, for example, in the EP 2 095 050 B1 disclosed.
  • a chamber with a supply connection is provided, via which the conveyed material comes from a pressure-resistant solids sluice arranged geodetically above with an upper part designed as a gas space, into the chamber.
  • the chamber comprises a collecting chamber which is enclosed by a common wall and has a central displacement body, such as, for example, a cone which tapers in the direction of the supply connection.
  • a plurality of openings for connecting the individual delivery lines is provided in the common wall, the displacement body in the collecting chamber, together with the common wall, forming an annular gap along the wall and in front of the openings. Due to the force of gravity and / or overpressure in the gas space of the solids lock, the material to be conveyed is distributed to the individual conveying lines.
  • the solids distributor refer to EP 2 095 050 B1 referenced.
  • the conveying lines comprise separate and separately controllable actuators for controlling the conveying gas and / or conveyed material flow through the individual conveying lines, the actuating elements preferably being designed to temporarily switch off the respective conveying line.
  • Appropriate actuators allow the conveyance of the material to be conveyed through the individual lines to be controlled and regulated separately, with the individual lines also being able to be loaded differently. If a single delivery line can be switched off temporarily, the total delivery rate of the delivery device can be varied, so that even during partial load operation, in which only part of the delivery capacity for which the delivery device is actually designed, is required, without the delivery parameters of the other delivery lines would have to be changed. With four delivery lines, the reduction in delivery capacity can be reduced by 25% by switching off one line, by 50% by switching off two lines, etc.
  • a control device is provided for the actuators of the individual delivery lines and for this purpose is designed to control the conveying gas and / or conveyed material flow through the individual conveying lines in such a way that a dense stream conveyance is guaranteed in each case.
  • Dense phase conveying for example, requires lower amounts of conveying gas than air conveying and is therefore usually more energy-efficient.
  • the separate delivery lines have a nominal diameter of at most 50 mm, preferably of at most 35 mm, more preferably of at most 25 mm. With correspondingly small nominal diameters, little or no dune formation occurs.
  • a secondary air supply can be required and provided on the burner in order to achieve a fuel-air ratio suitable for combustion to reach.
  • the conveying gas can preferably be air.
  • the fuel can in particular be ground coal and / or sawdust.
  • FIG. 1 a heating device 1 for pulverulent fuel with a pneumatic conveying device 10 is shown schematically.
  • the heating device 1 comprises a burner 2 which is supplied with pulverulent fuel, such as ground coal, from a storage silo (not shown in detail) via the conveying device 10.
  • pulverulent fuel such as ground coal
  • a solids sluice 13 is arranged at the feed end 11, in which fuel coming from the storage silo is temporarily stored in order to be fed into the conveying device 10.
  • the solids sluice 13 has a solids distributor 14 at its lower end, with which the fuel is basically evenly distributed over several - in the illustrated embodiment four - separate conveying lines 15 with a nominal diameter of 25 mm each.
  • the solids distributor 14 is according to EP 2 095 050 B1 designed.
  • the upper part of the solids lock 13 is therefore designed as a gas space in which an overpressure can be generated by the air supply 16.
  • the air supply 16 is also connected to the solids distributor 14 for introducing conveying air with which the fuel is ultimately transported through the conveying lines 15.
  • a separately controllable actuator 17 is provided on each of the individual conveying lines 15, via which additional conveying air can be introduced into the conveying lines 15 if necessary and with which the conveying flow coming from the solids distributor 14 can be limited, the limitation also taking place down to zero can, with which a single delivery line 15 can be switched off.
  • the actuators 17 are controlled via a control device, not shown, in particular in such a way that that with a desired flow of conveyed material, a dense phase conveyance results.
  • the proportion of conveying air in the flow of conveyed goods is regulated in such a way that the conveying speed is below the critical speed at which the conveying turns into air conveying.
  • the individual conveying lines 15 are brought together at the output end 12 of the conveying device 10 to form a common outlet opening 18, the burner 2 being connected to precisely this outlet opening 18. Even if the burner 2 is designed for a conveying device according to the prior art with a singular conveying line, it can in principle also be easily and in particular without structural adaptation with the invention and in FIG Figure 1 Use conveyor device 10 shown.
  • the burner 2 has a controllable secondary air supply 3 with which additional combustion air can be supplied to the burner 2 if the conveying air coming from the conveying device 10 is insufficient to achieve a desired fuel-air ratio for the combustion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)

Claims (11)

  1. Dispositif de transport pneumatique (10) destiné à être raccordé à un brûleur (2) et comprenant une extrémité d'alimentation (11), une extrémité de sortie (12) et une alimentation en gaz de transport (16) destinée à introduire un gaz de transport afin de transporter un matériau à transporter, transportable pneumatiquement, de l'extrémité d'alimentation (11) à l'extrémité de sortie (12), au moins deux conduites de transport pneumatique séparées (15) étant prévues de l'extrémité d'alimentation (11) à l'extrémité de sortie (12) pour distribuer le flux de matériau à transporter de l'extrémité d'alimentation (11) à l'extrémité de sortie (12),
    caractérisé en ce que
    les au moins deux conduites de transport pneumatiques séparées (15) sont réunies à l'extrémité de sortie (12) pour former une ouverture de sortie commune (18) destinée à être reliée à un brûleur (2).
  2. Dispositif de transport pneumatique selon la revendication 1,
    caractérisé en ce que
    au moins quatre, de préférence au moins six, conduites de transport séparées (15) sont prévues.
  3. Dispositif de transport pneumatique selon la revendication 1 ou 2,
    caractérisé en ce que
    au moins un sas pour matières solides (13) est prévu à l'extrémité d'alimentation (11), lequel est relié au moins à une partie des conduites de transport séparées (15) pour alimenter en matériau à transporter les conduites de transport individuelles (15).
  4. Dispositif de transport pneumatique selon la revendication 3,
    caractérisé en ce que
    le sas pour matières solides (13) comprend un distributeur de matières solides (14) destiné à distribuer uniformément le matériau à transporter vers les conduites de transport (15) qui sont raccordées à celui-ci.
  5. Dispositif de transport pneumatique selon l'une des revendications 1 à 4,
    caractérisé en ce que
    les conduites de transport (15) comprennent des actionneurs (17) séparés et commandables séparément destinés à commander le flux de gaz à transporter et/ou de matériau à transporter à travers les conduites de transport individuelles (15), les actionneurs (17) étant de préférence conçus pour commuter deux fois la conduite de transport respective (15).
  6. Dispositif de transport pneumatique selon la revendication 5,
    caractérisé en ce que
    un dispositif de commande des actionneurs (17) des conduites de transport individuelles (15) est conçu pour commander le flux de gaz à transporter et/ou de matériau à transporter à travers les conduites de transport individuelles (15) de manière à garantir à chaque fois un transport de flux dense.
  7. Dispositif de transport pneumatique selon l'une des revendications 1 à 6,
    caractérisé en ce que
    les conduites de transport séparées (15) ont un diamètre nominal de 50 mm maximum, de préférence de 35 mm maximum, plus préférablement de 25 mm maximum.
  8. Dispositif de chauffage (1) comprenant un brûleur (2) et un dispositif de transport pneumatique (10) destiné à transporter du combustible comme matériau à transporter, le dispositif de transport pneumatique (10) étant conçu selon l'une des revendications précédentes et le brûleur (2) étant relié à l'ouverture de sortie commune (18) du dispositif de transport pneumatique (10) .
  9. Dispositif de chauffage selon la revendication 8, au moins deux sas pour matières solides (13) étant prévus pour recevoir des combustibles différents, lesquels sas sont reliés chacun et/ou peuvent être reliés chacun sélectivement à une partie des conduites de transport (15) .
  10. Dispositif de chauffage selon la revendication 8 ou 9,
    le brûleur (2) comportant une alimentation en air secondaire commandable (3).
  11. Dispositif de chauffage selon l'une des revendications 8 à 10,
    le gaz de transport étant de l'air et/ou le combustible étant du charbon broyé et/ou de la sciure de bois.
EP18179912.3A 2018-06-26 2018-06-26 Dispositif de transport pneumatique et dispositif de chauffage Active EP3587924B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK18179912.3T DK3587924T3 (da) 2018-06-26 2018-06-26 Pneumatisk transportindretning og varmeindretning
EP18179912.3A EP3587924B1 (fr) 2018-06-26 2018-06-26 Dispositif de transport pneumatique et dispositif de chauffage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18179912.3A EP3587924B1 (fr) 2018-06-26 2018-06-26 Dispositif de transport pneumatique et dispositif de chauffage

Publications (2)

Publication Number Publication Date
EP3587924A1 EP3587924A1 (fr) 2020-01-01
EP3587924B1 true EP3587924B1 (fr) 2021-09-29

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ID=62791632

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Application Number Title Priority Date Filing Date
EP18179912.3A Active EP3587924B1 (fr) 2018-06-26 2018-06-26 Dispositif de transport pneumatique et dispositif de chauffage

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EP (1) EP3587924B1 (fr)
DK (1) DK3587924T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005021659U1 (de) * 2005-10-07 2010-01-14 Siemens Aktiengesellschaft Vorrichtung für Flugstromvergaser hoher Leistung
DE202006016093U1 (de) 2006-10-20 2008-03-06 Claudius Peters Technologies Gmbh Kohleverteiler für Hochöfen u.dgl.
DE102008049542C5 (de) * 2008-09-30 2016-10-20 Siemens Aktiengesellschaft Staubdosiersystem für hohe Drücke durch eine Kombination von Staubpumpe und Schleuse
DE102011083210B4 (de) * 2011-09-22 2014-03-13 Siemens Aktiengesellschaft Vorrichtung und Verfahren zur pneumatischen Förderung von Stäuben mit einer reduzierten Menge an Fluidisierungsgas

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EP3587924A1 (fr) 2020-01-01
DK3587924T3 (da) 2021-12-13

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