EP3551317A1 - Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant - Google Patents

Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant

Info

Publication number
EP3551317A1
EP3551317A1 EP17816591.6A EP17816591A EP3551317A1 EP 3551317 A1 EP3551317 A1 EP 3551317A1 EP 17816591 A EP17816591 A EP 17816591A EP 3551317 A1 EP3551317 A1 EP 3551317A1
Authority
EP
European Patent Office
Prior art keywords
flue gas
swirling
flow direction
duct
gas 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Withdrawn
Application number
EP17816591.6A
Other languages
German (de)
English (en)
Inventor
Bernd Vollmer
Ulrich Kersken
Hubert Haslach
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.)
Mitsubishi Power Europe GmbH
Original Assignee
Mitsubishi Hitachi Power Systems Europe 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 Mitsubishi Hitachi Power Systems Europe GmbH filed Critical Mitsubishi Hitachi Power Systems Europe GmbH
Publication of EP3551317A1 publication Critical patent/EP3551317A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • 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
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/30—Mixing gases with solids
    • B01F23/32—Mixing gases with solids by introducing solids in gas volumes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/12—Methods and means for introducing reactants
    • B01D2259/128—Solid reactants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/60—Heavy metals; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00—Treatment devices
    • F23J2219/30—Sorption devices using carbon, e.g. coke

Definitions

  • the invention is directed to a flue gas treatment process in which in the flue gas flow downstream of a fossil-fired boiler of a steam power plant, a fine particulate carbonaceous adsorbent, especially activated carbon or activated coke, for discharging heavy metals, especially mercury, introduced into a flue gas stream flowing in a flue gas channel of the boiler and / or is injected.
  • the invention is directed to a Rauchgas adaptationsvornchtung for the separation of heavy metals, in particular mercury, from a flowing in a flue gas duct of a fossil-fired boiler of a steam power plant flue gas stream comprising in the flue gas flow downstream of the boiler at least one introduction, by means of which a fine particulate, carbonaceous adsorbent, in particular Activated carbon or activated coke, in the flue gas stream flowing in the flue gas channel can be introduced and / or injected.
  • a Rauchgas adaptationsvornchtung for the separation of heavy metals, in particular mercury, from a flowing in a flue gas duct of a fossil-fired boiler of a steam power plant flue gas stream comprising in the flue gas flow downstream of the boiler at least one introduction, by means of which a fine particulate, carbonaceous adsorbent, in particular Activated carbon or activated coke, in the flue gas stream flowing in the flue gas channel can be introduced and / or injected.
  • Power plant boilers of steam power plants produces an exhaust gas containing dust, carbon dioxide (C0 2 ), nitrogen oxide (NO x ), but also other, especially from burnt coal-derived elements, such as the heavy metal mercury contains.
  • the present invention seeks to further develop a generic method and a generic device to the effect that the distribution of the carbonaceous adsorbent in the flue gas improves and its separation efficiency is increased for heavy metal contained in the flue gas, in particular mercury.
  • this object is achieved in that in the flue gas duct by means of at least one arranged in the flue gas duct first swirling agent, in particular first static mixer, at least a first Rauchgasverwirungsungszone the flue gas stream, in particular on a downstream with respect to the flue gas flow direction Side of the at least one first swirling agent, produced and the adsorbent is introduced and / or injected at least in this first Rauchgasverwirungsungszone in the turbulent flue gas stream.
  • first swirling agent in particular first static mixer
  • the above object is achieved in a flue gas treatment device of the type described in more detail that the flue gas treatment device also assigned at least one of the at least one introduction, arranged in Rauchgasstromungsnchtung in the flue gas duct upstream of the inlet and the inflowing flue gas flow into at least one of the at least one inlet device
  • Adsorptionsstoffstrom detecting flue gas swirling zone vortexing first swirling agent, in particular at least one first static mixer comprises.
  • the inventive design of the flue gas treatment process and the flue gas treatment device results in a much finer, more uniform and improved distribution of finely particulate, carbonaceous adsorbent in the flue gas and thereby increased separation efficiency of, for example, mercury from the flue gas.
  • This is accomplished by placing the adsorbent in a flue gas fluidization zone of the flue gas, i. in a turbulent flue gas stream is introduced. Due to the prevailing in the vortex zone turbulent flows and turbulence, the introduced or injected adsorbent is distributed in the flue gas and just not entrained directly by the past at the injection point partial flow of the flue gas. This is achieved in the method according to the invention in particular by the fact that the
  • Adsorbent is introduced and / or injected in the produced Rauchgasverwirbelungszone in the turbulent flue gas stream.
  • this can be achieved in particular in that the introduction device for the particulate carbonaceous adsorbent in Rauchgasstromungsnchtung in the flue gas duct downstream of a (first) swirling agent, which is in particular a (first) static mixer, is arranged.
  • a (first) swirling agent which is in particular a (first) static mixer
  • the invention provides that the at least one first flue-gas fluidizing zone is produced, in particular, by means of at least one first group of turbulizers arranged in the flue-gas duct, in particular static mixers comprising the at least one first turbulizer, in particular the first static mixer is generated on a downstream side of the at least one first group relative to the flue gas flow direction, and the adsorbent is introduced and / or injected into the swirling flue gas stream at least in this first flue gas swirling zone produced.
  • the flue gas treatment apparatus is characterized in that the at least one first swirling means, in particular the at least one first static mixer, is part of a first group of swirling means, in particular of static mixers, arranged in the flue gas duct.
  • Static mixers have been found to be particularly suitable devices for swirling the flue gas flow impinging thereon and forming a flue gas swirling zone.
  • the swirling means, in particular static mixers are designed such that they protrude into the flow cross section formed by the flue gas duct.
  • the flue gas swirling means are formed as disks which, with their large pane surface inclined obliquely, inclined in the flue gas flow direction preferably obliquely downwards, projecting on the wall of the flue gas duct project into the flue gas duct flow cross-section.
  • the disks may be formed, for example, as circular plates, but also elliptical or triangular.
  • the invention therefore provides in an advantageous embodiment of the method, that by means of at least one in the flue gas flow direction in the flue gas downstream to the at least one first swirling agent, in particular the first static mixer, or the first group of swirling agents, in particular static mixers, arranged second swirling agent, in particular second static mixer, or by means of at least one second swirling agent, in particular the second static mixer comprising second set of turbulators, in particular static mixers, a second Rauchgasverwirbelungszone the flue gas stream is generated and / or that by means of at least one in Rauchgasstromungsraum in the flue gas duct downstream of the at least one second swirling agent, in particular second static mixer, or the second group of swirling means, in particular static mixers, arranged third Verw Irbelungsstoff
  • the flue gas treatment apparatus is characterized in that the at least one introduction device in the flue gas duct in the flue gas flow direction downstream of the at least one first swirling agent, in particular the at least one first static mixer, or the first group of swirling agents, in particular static mixers, at least an inflowing one
  • Flue gas stream to a second Rauchgasverwirbelungszone swirling second swirling means is disposed in the flue gas duct and / or that the at least one introduction device in the flue gas duct in
  • first, second or third swirling means depends in particular on the particular flue gas channel geometry and flue gas channel guidance.
  • carbonaceous adsorbent is introduced and / or injected into the fluidized flue gas stream exclusively in the region of the first flue gas fluidization zone
  • the inlet device used for this purpose may well comprise a plurality of inlet openings or inlet nozzles or several inlet elements, all on the first flue gas fluidization zone are optionally produced and formed by joint cooperation of a plurality of first Verwirbelungsstoff.
  • the invention therefore provides in a further embodiment of the method that the adsorbent in Rauchgasstromungsnchtung in the flue gas duct exclusively downstream of the at least one first vortex means or the first group of vortex means and upstream of the at least one second vortex means or the second group of vortex means and / or upstream of the at least a third turbulizer or the third group of turbulizers in the turbulent flue gas stream (R) is introduced and / or injected.
  • An advantageous site for the introduction of the carbonaceous adsorbent is located in the flue gas duct in the flue gas flow direction downstream of a conventional denitrification or denitrification.
  • the invention therefore also provides, in a further embodiment of the method, in the flue gas flow direction downstream of a flue gas denitration device arranged in the flue gas channel and through which the flue gas flows, in particular a device for the selective catalytic reduction of nitrogen oxides, by means of the first swirling means (s) the at least one first flue gas swirling zone produced and the adsorbent is introduced and / or injected in the first Rauchgasverwirbelungszone in the turbulent flue gas stream.
  • the invention provides in an embodiment of the device that the at least one introduction device and the at least one first Verwirbelungsm means in the flue gas flow downstream of a arranged in the flue gas duct and flue gas flowing through the flue gas denitrification are arranged in the flue gas duct.
  • the introduction of particulate, carbonaceous adsorbent can be formed both before and behind (in relation to the flue gas flow direction) such a conventional air preheater.
  • the invention therefore further provides that in the flue gas flow direction downstream or upstream of an air preheater arranged in the flue gas duct and flowing through the flue gas by means of the first swirler (s) generates the at least one flue gas swirling zone and introduces the adsorbent in the swirling flue gas flow in the first flue gas swirling zone / or is injected.
  • the invention with respect to the device provides that the at least one introduction device and the at least one first Verwirbelungsm means in the flue gas flow direction downstream or upstream of a arranged in the flue gas duct and the flue gas through which Heilvorierrs are arranged in the flue gas duct.
  • the at least one introduction device and the at least one first Verwirbelungsm means in the flue gas flow direction downstream or upstream of a arranged in the flue gas duct and the flue gas through which Heilvor lockerrs are arranged in the flue gas duct.
  • Flue gas treatment apparatus provides that the at least one introduction device and the at least one first Verwirbelungsm means in Rauchgasstromungsnchtung upstream of a arranged in the flue gas duct and traversed by the flue gas dust filter, in particular electrostatic precipitator, are arranged in the flue gas duct.
  • the introduction or injection of the carbonaceous adsorbent is advantageously carried out in a range in which the flue gas temperature is in the range between 100 ° C and 420 ° C.
  • the invention therefore also provides that the adsorbent in the at least one first Rauchgasverwirungsungszone in a flue gas temperature between 100 ° C and 420 ° C, preferably between 310 ° C and 420 ° C, initiated flue gas stream initiated and / / or injected.
  • the adsorbent is injected upstream of an air preheater (LuVo) or a gas / water heat exchanger incorporated in the flue gas duct, this is done at a flue gas temperature between 310 ° C and 420 ° C.
  • An injection of adsorbent downstream of such devices takes place in a flue gas stream with a flue gas temperature between 120 ° C and 190 ° C.
  • the method according to the invention in a further embodiment finally characterized by the fact that in one, preferably in the flue gas flow direction upstream of / of the air preheater of the flue gas duct branching and in the flue gas flow direction, preferably upstream of a / of the dust filter and preferably downstream of the air preheater again in this inflowing bypass duct by means of at least one arranged in the bypass duct further swirling agent, in particular further static mixer, or another group of swirling agents, in particular further static mixers, at least one further Rauchgasverwirbelungszone the flue gas stream generated and further
  • the flue gas treatment device is characterized in that arranged in a, preferably in the flue gas flow direction upstream of the / of the air preheater, branching from the flue gas duct and in the flue gas flow direction preferably upstream of / a dust filter and preferably downstream of the air preheater again in this opening bypass duct another flue gas treatment device is that at least one further introduction device by means of which a finely particulate, carbonaceous adsorbent, in particular activated carbon or activated coke, in the bypass passage flue gas flow is introduced and / or injected and at least one of the at least one further introduction associated, in the flow direction of the flue gas in the bypass channel upstream of the at least one further inlet device arranged and the inflowing flue gas stream in at least one of the at least one further inlet device effluent stream of adsorbent further flue gas turbulence zone vortexing further fluidizing means, in particular at least one further static mixer comprises.
  • the invention is also characterized in that the bypass duct branches off from the flue gas duct in the flue gas flow direction upstream of the at least one introduction device and of the first swirling agent or of the first group of swirling means.
  • the temperature of the flue gas is advantageously between 310 ° C and 420 ° C.
  • the respective introduction device or introduction device for the particulate, carbonaceous adsorbent is in close proximity to the first swirling agent (s) forming the first flue gas swirling zone, so that the Adsorbent directly into the just incurred (the inlet and inlet device is arranged in the flue gas flow direction downstream of the swirling means) Rauchgasverwirungsungszone is introduced.
  • the strong turbulence energies which are still present here are thus utilized directly, whereas in the further course of the flow, a weakening of the turbulence area or of the flue gas fluidization zone then takes place again.
  • Adsorbent increased separation efficiency or at a given constant separation efficiency, a lower use of adsorbent can be achieved in comparison to the prior art. It is also due to the fine distribution and good distribution of the adsorbent by means of formed Rauchgasverwirungsungszone (s) possible to make do with a small number of inlet openings or inlet nozzles or Einleitein- or devices for the introduction of the adsorbent.
  • the invention is explained in more detail below by way of example with reference to the drawing. This shows in
  • FIG. 1a in a schematic sectional view of a section of a
  • FIG. 1 b in a schematic representation of the flue gas duct section of FIG.
  • FIG. 1 a in relation to FIG. 1 a rotated by 90 ° schematic sectional view
  • Fig. 2 is a schematic representation of a plan view of a
  • FIG. 3a in a schematic sectional view in side view a
  • Fig. 4 shows a schematic representation of a flue gas train with formed therein bypass channel.
  • the flue gas treatment devices 14, 14 ' which can be seen in particular from FIGS. 1 a, 1 b and 3 a, 3 b, each comprise at least one introduction device 9, by means of which a fine-particulate, carbon-containing adsorbent, in particular activated carbon or activated coke, into one Flue gas channel 5 can be introduced, in particular be injected.
  • the respective flue gas treatment apparatus 14, 14 'according to the invention also comprises at least one first swirler 10 associated with the respective at least one introducer 9.
  • a single first swirler 10 may also be part of a first group 11 of swirlers 10'. Such a group 1 1 on the first turbulizers 10, 10 'is shown in the embodiments of FIGS.
  • first swirling means 10, 10 ' are arranged one above the other in the flue-gas flow direction R, with the respective upper swirling means 10, 10' of the paired swirling means, respectively upstream of the first flue-gas flow direction R, being assigned an introduction device 9.
  • the respective group 11 at the first swirling means 10, 10 ' can also comprise more than the four first swirling means 10, 10' illustrated. However, it is then exclusively assigned to each first swirling means 10, 10 ', which is located in the respectively upper, upstream row of the first group 11, an introduction device 9.
  • a first group of turbulators 10, 10 ' may also consist of the combination of individual first turbulators 10 with paired turbulators 10' or any desired combination of turbulators 10, 10 '.
  • the first swirling means 10, 10 ' are formed in the embodiment as circular plates and arranged obliquely inclined with an inclination angle to the flue gas flow direction R in the respective flue gas duct 5 that they form a static mixer for the flue gas flowing past them.
  • the static mixers form at their edges a stable flow vortex which uniformly mixes the adsorbed agent (in) with (and in) the flue gas stream. Because of this function, the individual first swirling means 10, 10 'form a flue-gas swirling zone on their downstream side with respect to the flue-gas flow direction R, virtually on the leeward side.
  • a large common flue-gas swirling zone forms on the downstream or leeward side of this group of first swirling means 10, 10' overall.
  • the specific design of the individual swirling zones formed by a respective first swirling element 10, 10 'and of the total flue-gas swirling zone can be influenced by the relative position and inclination of the individual first swirling elements 10, 10' and adjusted to the desired level.
  • Figures 1 a and 1 b show a portion of the flue gas channel 5, which is arranged in the flue gas flow direction R after a fossil-fired boiler and a flue gas denitrification device 2 and formed.
  • FIGS. 3a and 3b shows a schematic representation of a portion of the flue gas duct 5, which is connected in the flue gas flow direction R an air preheater (LuVo), which is usually preheated countercurrently supplied combustion air for the fossil-fired boiler.
  • this exemplary embodiment according to FIGS. 3 a and 3 b shows the possibility that the at least one first swirler 10 or the first group 1 1 is arranged downstream of the swirling means 10 'in the flue gas flow direction R and forms second swirling means 12 and third swirling means 13 are assigned and can be present in principle.
  • At least one second swirling means 12 and at least one third swirling means 13 are respectively realized in the exemplary embodiments according to FIGS. 3 a and 3 b.
  • the second and third swirling means 12, 13 each in the form of a group, ie a second group of swirling agents and a third
  • the second and third swirling means 12, 13 are each inclined to the flue gas flow direction R in the flue gas channel 5, so that in each case a second flue gas fluidizing zone or a third Flue gas swirling zone is formed at pending flue gas flow on the lee side. Also the second (s)
  • Swirling means (n) and the third or third swirling means (s) each form or are already configured as a static mixer.
  • the flue gas channel 5 opens both in the embodiment of FIGS. 1 a, 1 b as well as that of FIGS. 3a, 3b then upstream of the at least one introduction device 9 for the carbonaceous absorbent and the respectively provided first Verwirbelungsm means 10th , 10 'and, if desired, second and third Verwirbelungsm means 12, 13 having mixing and adsorption of the flue gas duct 5 in a dust filter, as is commonly present in flue gas trains of fossil-fired power plants and provided in the embodiment of FIG. 4 by the reference numeral 4.
  • this dust filter the now loaded with heavy metals, especially mercury, particulate carbonaceous adsorbent is removed from the flue gas stream.
  • Fig. 4 shows a flue gas duct 5 or flue gas string comprising the sections 5a to 5d.
  • the flue gas channel section 5a forms the supply line of the flue gas to a flue gas denitrification device 2
  • the flue gas channel section 5b forms the connection between the flue gas denitrification device 2 and an air preheater (LuVo) 3, which in turn is connected to the dust filter 4 by means of the flue gas channel section 5c, from which then the flue gas channel section 5d, the flue gas in the flue gas flow direction R derived.
  • LiVo air preheater
  • a flue gas treatment device 14 or 14 ' is arranged in the flue gas section 5b, which is embodied, for example, as shown in FIGS. 1 a, 1 b or 3 a, 3 b and in particular comprises at least one introduction device 9 with at least one associated first swirling means 10.
  • a bypass channel 6 a partial flow of flue gas to a heat exchanger 7 leading first bypass channel section 6a and a leading back from the heat exchanger 7 in the flue gas duct 5 second bypass channel section 6b includes.
  • a further flue-gas treatment device 15 is arranged and formed in the flue-gas flow direction R upstream of the heat exchanger 7, which at least a further introduction device 8 for the supply of fine particle-shaped, carbonaceous adsorbent, in particular activated carbon or activated coke, and at least one further fluidizing means 16 and comprises.
  • this further flue-gas treatment device 15 and its configuration is the same as that of the flue-gas treatment devices 14, 14 'shown in FIGS. 1 a, 1 b or 3 a, 3 b.
  • the desired carbonaceous adsorbent is introduced into the partial flue gas flow in the bypass channel section 6b by means of the at least one further introduction device 8.
  • the at least one further introduction device 8 in the flow direction R of the flue gas is assigned upstream the further swirling means 16 arranged in the bypass channel section 6a, which here forms a further flue gas swirling zone, into which the absorption medium is introduced or injected.
  • the mode of action and design of the further introduction device 8 and of the further swirling element 16 may be identical to the embodiments of the first swirling element 10, 10 'and the introduction device 9.
  • a further group of further swirling means 16 can also be designed and arranged in an analogous manner here.
  • the one or more further swirling means (s) preferably form a further static mixer or are already designed as static mixers.
  • the heat exchanger 7 is an air (flue gas) -water heat exchanger, in which the feed water S to be supplied to the steam circuit or guided therein.
  • the bypass channel 6 branches in the flue gas flow direction R downstream of the
  • the bypass channel 6 and the (smoke) gas-water heat exchanger 7 located in the flue gas heat energy can integrate back into the water / steam cycle of the fossil-fired steam power plant by coupled heat in the heat exchanger 7 from the flue gas and coupled into the boiler feed water becomes.
  • the air preheater 3 (LuVo) and the heat exchanger 7 are shown schematically as separate units. Constructively, however, the two units are arranged in a building / housing, the LuVo building.
  • the flue gas denitrification device 2 is designed as a selective catalytic reduction (SCR).
  • SCR selective catalytic reduction
  • ammonia is usually introduced into the flue gas leading flue gas channel before a (selective catalytic reduction) catalyst, where the ammonia reacts with the nitrogen oxides of the flue gas to water and elemental nitrogen.

Abstract

L'invention concerne un procédé de traitement de gaz de fumée, selon lequel, en aval, dans le sens d'écoulement de gaz de fumée (R), d'une chaudière à combustible fossile d'une centrale thermique à vapeur, un adsorbant carboné sous forme de fines particules, en particulier du charbon actif ou du coke actif, est introduit et/ou injecté dans un flux de gaz de fumée s'écoulant dans un carneau (5) de la chaudière, afin de séparer des métaux lourds, en particulier du mercure. L'invention vise à améliorer la répartition de l'adsorbant carboné dans le gaz de fumée et à augmenter son efficacité de séparation de métaux lourds, en particulier de mercure, contenus dans le gaz de fumée. À cet effet, au moyen d'au moins un premier moyen de tourbillonnement (10, 10'), en particulier d'un premier mélangeur statique, disposé dans le carneau (5), au moins une première zone de tourbillonnement du flux de gaz de fumée, en particulier sur un côté aval, par rapport au sens d'écoulement de gaz de fumée (R), dudit au moins un premier moyen de tourbillonnement (10, 10'), est produite dans le carneau (5), et l'adsorbant est introduit et/ou injecté dans le flux de gaz de fumée tourbillonnaire dans cette première zone de tourbillonnement de gaz de fumée.
EP17816591.6A 2016-12-12 2017-12-01 Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant Withdrawn EP3551317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016124042.7A DE102016124042A1 (de) 2016-12-12 2016-12-12 Verfahren und Vorrichtung zur Rauchgasbehandlung von Rauchgasen fossil befeuerter Dampfkraftwerke mittels eines Adsorptionsmittels
PCT/EP2017/081096 WO2018108561A1 (fr) 2016-12-12 2017-12-01 Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant

Publications (1)

Publication Number Publication Date
EP3551317A1 true EP3551317A1 (fr) 2019-10-16

Family

ID=60702660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17816591.6A Withdrawn EP3551317A1 (fr) 2016-12-12 2017-12-01 Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant

Country Status (3)

Country Link
EP (1) EP3551317A1 (fr)
DE (1) DE102016124042A1 (fr)
WO (1) WO2018108561A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112675698B (zh) * 2020-12-23 2023-02-28 山东祥桓环境科技有限公司 一种分仓室湍动床脱硫脱硝除尘装置及其工艺

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534831A1 (fr) * 1982-10-25 1984-04-27 Air Ind Installation d'injection d'une matiere pulverulente, notamment d'une matiere adsorbante, dans une colonne de contact
DE3510669A1 (de) * 1985-03-23 1986-09-25 Walter 2848 Vechta Kärcher Vorrichtung zum beseitigen von schadstoffen aus rauchgasstroemen sowie verfahren zum betrieb der vorrichtung
WO2000062915A1 (fr) * 1999-04-19 2000-10-26 Koch-Glitsch, Inc. Melangeur statique a tourbillons et procede utilisant ce melangeur
US8069797B2 (en) 2003-06-03 2011-12-06 Alstom Technology Ltd. Control of mercury emissions from solid fuel combustion
US6848374B2 (en) 2003-06-03 2005-02-01 Alstom Technology Ltd Control of mercury emissions from solid fuel combustion
US20070160517A1 (en) * 2005-12-22 2007-07-12 Foster Wheeler Energy Corporation Catalyst, a method of using a catalyst, and an arrangement including a catalyst, for controlling NO and/or CO emissions from a combustion system without using external reagent
DE102006038443B3 (de) * 2006-08-16 2007-09-13 Andreas Friedl Vorrichtung zur Reinigung von Rauchgas
US7544339B2 (en) * 2007-03-27 2009-06-09 General Electric Company Method and apparatus for removing mercury from combustion exhaust gas
US8083156B2 (en) * 2007-05-18 2011-12-27 Urs Corporation Dispersion lance and shield for dispersing a treating agent into a fluid stream
DE102009032537A1 (de) * 2009-07-10 2011-01-13 Hitachi Power Europe Gmbh Kohlekraftwerk mit zugeordneter CO2-Wäsche und Wärmerückgewinnung
EP2555851B1 (fr) 2010-04-07 2021-09-01 Calgon Carbon Corporation PROCÉDÉS POUR L'ÉLIMINATION DU MERCURE DE GAZ DE combustion
US8663586B1 (en) 2012-08-07 2014-03-04 Alstom Technology Ltd High performance mercury capture
US9468904B2 (en) * 2013-12-31 2016-10-18 Ada Carbon Solutions, Llc Sorbent compositions having pneumatic conveyance capabilities
US20160045862A1 (en) * 2014-08-13 2016-02-18 Breen Energy Solutions, L.L.C. Dry Material Distribution Device for a Duct with Gas Flow
US10350545B2 (en) * 2014-11-25 2019-07-16 ADA-ES, Inc. Low pressure drop static mixing system

Also Published As

Publication number Publication date
WO2018108561A1 (fr) 2018-06-21
DE102016124042A1 (de) 2018-06-14

Similar Documents

Publication Publication Date Title
EP2237861A1 (fr) Dispositif d'épuration de gaz de fumée
DE3843543A1 (de) Verfahren zum strahlvermischen von gasen
DE3532281A1 (de) Verfahren und anordnung zur nox-reduzierung in den abgasen eines wirbelbettkessels
DE112008001319T5 (de) Staubkohlenkessel, Staubkohle-Verbrennungsverfahren, Staubkohlenbrennstoff-Wärmeleistungserzeugungssystem und Abgasreinigungssystem für Staubkohlenkessel
DE3723618C1 (en) Apparatus for mixing two gases
EP0195075B1 (fr) Procede et dispositif d'elimination catalytique selective d'oxydes d'azote des gaz d'echappement de fourneaux
EP3551317A1 (fr) Procédé et dispositif de traitement de gaz de fumée de centrales thermiques à vapeur à combustibles fossiles au moyen d'un adsorbant
EP0972560B1 (fr) Procédé et dispositif pour le mélange intensif de réactants
DE3615705A1 (de) Rauchgaskanal fuer grosskessel mit einer vorrichtung zum einspeisen von ammoniak in den rauchgasstrom
WO2007085472A1 (fr) Procédé et dispositif pour mélanger un fluide gazeux à un flux gazeux important, notamment pour introduire un agent réducteur dans un gaz de combustion contenant des oxydes d'azote
WO1985003455A1 (fr) Procede d'extraction de substances nocives gazeuses contenues dans des gaz de fumees
DE10123402A1 (de) Verfahren zum Behandeln von ammoniakhaltigen Rauchgasen
DE3724666C1 (en) Process for the denitration of flue gas
DE2919812A1 (de) Verfahren und vorrichtung zur behandlung von abgasen
EP3260776B1 (fr) Système de lance, citerne comprenant un système de lance et procédé de réduction de nox
DE4112454A1 (de) Verfahren und vorrichtung zur staubabscheidung aus einem rauchgasstrom einer kohlenstaubfeuerung
DE19633004A1 (de) Kanalbrenner und Verfahren zum Aufheizen eines strömenden Gases
DE112010002581B4 (de) Rauchgasreinigungsanlage mit Düsenvariation
WO2019206931A1 (fr) Procédé de dénitruration de gaz de fumée et installation de dénitruration de gaz de fumée adaptée pour mettre en œuvre le procédé destinée à être intégrée dans une centrale électrique produisant des gaz de fumée
AT389652B (de) Verfahren zur abscheidung von in rauchgasen enthaltenen gasfoermigen schadstoffen
DE102019127869B4 (de) Verfahren und Vorrichtung zur selektiven nicht-katalytischen Reduktion von Stickoxiden in Rauchgasen
DE19606135A1 (de) Katalysatoranordnung, insbesondere für einen Dreizugkessel
DE3206409A1 (de) Wasserrohrkessel mit rauschgasentschwefelung
DE3120036C2 (de) "Vorrichtung zum gleichmäßigen Verteilen eines mit Feststoffen beladenen Luft- oder Gasstromes
DE3823223A1 (de) Verfahren zum reinigen von schwefeloxide und stickoxide enthaltenden rauchgasen

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190624

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
RAX Requested extension states of the european patent have changed

Extension state: BA

Payment date: 20190712

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210305

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: 20210716