EP2357409A2 - Installation de dénitruration de gaz de fumée doté d'un dispositif de soufflage d'air - Google Patents

Installation de dénitruration de gaz de fumée doté d'un dispositif de soufflage d'air Download PDF

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Publication number
EP2357409A2
EP2357409A2 EP11154808A EP11154808A EP2357409A2 EP 2357409 A2 EP2357409 A2 EP 2357409A2 EP 11154808 A EP11154808 A EP 11154808A EP 11154808 A EP11154808 A EP 11154808A EP 2357409 A2 EP2357409 A2 EP 2357409A2
Authority
EP
European Patent Office
Prior art keywords
catalyst
fluid
openings
flat surface
inflow side
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Withdrawn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
EP11154808A
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German (de)
English (en)
Other versions
EP2357409A3 (fr
Inventor
Dr.-Ing. Boris Baberkov
Dipl.-Ing. Marcus Konietzny
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.)
Interprojekt GmbH
Original Assignee
Interprojekt 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 Interprojekt GmbH filed Critical Interprojekt GmbH
Publication of EP2357409A2 publication Critical patent/EP2357409A2/fr
Publication of EP2357409A3 publication Critical patent/EP2357409A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • 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
    • F23J2215/10—Nitrogen; 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
    • F23J2219/10—Catalytic reduction devices

Definitions

  • the invention relates to a system for Entsticken of flue gas with a blow-off device and a method for operating the same.
  • the invention relates to a glass furnace with such.
  • DE 195 02 097 and WO 97/091 1 2 reveal the use of sootblowers in the Generally and also to remove the caking from the catalyst surface, wherein the sootblowers are moved in the operating position and moved along the catalyst surface. This is done manually or automatically.
  • DE 36 37 395 discloses slidable blow-off pipes upstream of the catalyst in the direction of flow for cleaning the catalyst.
  • US 1 664 865 discloses a sootblower, particularly working with steam, which gradually tapers from the inlet opening towards the end, on the one hand to save expensive heat-resistant material and, on the other hand, less resistance to oppose the combustion gases.
  • WO 97/091 1 2 discloses a flue gas purification system using a vertical catalytic lysator. It is mentioned that wedge-shaped dust deposits form in the vertical exhaust gas inlet at the top of the walls of the catalytic converter, which are entrained intermittently by the exhaust air flow and thus can lead to blockages in the catalytic converter.
  • DE 30 44 820 also relates to a vertical catalyst in a flue gas cleaning plant, to solve the above-mentioned problem fixed or movable nozzles are provided, which blow from the top of the catalyst to remove dust.
  • DE 36 37 395 discloses a flue gas purification system with a horizontal catalyst, which is traversed horizontally by the flue gas.
  • vertically movable Abblasrohre are provided in the direction of flow in front of the catalysts, blow through the horizontal channels of the catalyst to remove deposits therein.
  • DE 33 12 599 discloses a sootblower for removing deposits in quite specific spaces, such as heat exchangers. This is in the outer wall of the heat exchanger, which may for example consist of a plurality of parallel tubes, integrated and blows along the wall to eliminate soot deposits.
  • DE 1 551 893 concerns a sootblower for steam generators.
  • Soot blowers are traditionally used for cleaning flue gas on so-called heating surface pipes in steam-fired steam boilers.
  • sootblowers are designed as a tube, which has a certain number of outlet holes, through which steam emerges. This occurs against the heating surfaces and frees them from fly ash and soot.
  • Sootblowers can be designed as a simple tube or rake.
  • sootblowers Since the sootblowers have been taken from another technical field of application and are used almost invariably for cleaning the DeNOX catalysts, they are not optimally adapted and the following disadvantages arise: Due to the high pressures (6 to 10 bar) and air volumes, the ceramic surfaces of the catalyst attacked. In addition, the air consumption is correspondingly high. Therefore, large wind boilers of about 15 - 20 m 3 are necessary with correspondingly high furnishing, maintenance and space costs. This also results in long filling times, which must be observed before a new air blast can be carried out. However, it is important that many air blasts can be done in a short time to minimize equipment downtime. Due to the high amounts of air also much cold is introduced into the system, resulting in thermal stress in the susceptible ceramic catalyst.
  • Chipped catalyst fragments clog the longitudinal channels and thus lower the denitrification rate. Therefore, it is necessary to shut down the DeNOX reactor, that is, the components, typically 300-400 ° C, are given the opportunity to cool down to enter the reactor. Each time you cool down and up, thermal stresses occur. By raising and lowering the DeNOX reactor, the catalyst "poisoned", which is effective only from 300 degrees. The use of the mobile sootblowers also requires space outside the reactor to process them. The place will be needed for the withdrawn sootblower as well as the corresponding mechanics, eg servomotor, hydraulics, pneumatics etc.
  • the blower runs along a side edge of the flat surface, wherein the openings are arranged in the direction of the flat surface, so blow out in this direction.
  • the advantage of the invention is, in particular, that during operation, ie without stopping or opening the flue gas cleaning system, the dust deposits can be removed. Due to the fact that the fluid, in particular compressed air, does not act on the inlet surface, but rather tangentially on the inflow surface, that is to say the sensitive webs, they last longer and their flakes do not clog the longitudinal channels of the catalyst.
  • the advantages of the invention are particularly advantageous in vertical catalysts, since they are particularly prone to dust deposits on the horizontal inflow surface or the horizontally extending webs.
  • a vertical catalytic converter has vertical longitudinal channels for the flow of flue gas from top to bottom.
  • blow-off device is arranged "fixedly" relative to the catalyst body is a distinction from the prior art, which requires a method of cleaning device for cleaning. According to the invention, it is here meant that the blow-off device is arranged immovably relative to the catalyst body.
  • the blower is welded, but according to the invention, a screwing or fastening with other suitable fastening means is possible. The blower is thus not movably disposed within the device or the system, and there is no means of transport to be able to move the blower relative to the catalyst body.
  • blower can be driven in and out, which would be useful in practice, however, only for maintenance purposes. It is essential here that no means for operating the blower during operation, d. H. the Ablasen of residues are provided, so the blower when blowing off the blower is not moved, but is fixed.
  • the openings are formed as slots. This allows high-volume blow-out of high volumes.
  • these slots extend along a line which is arranged parallel to the side edge of the flat surface.
  • a single continuous slot is preferably provided.
  • webs are left between the slots, the webs being as narrow as possible but sufficient to stabilize the blower against bursting. It follows that a plurality of slots are provided over the length of the line, which have a possible small distance from each other.
  • the skilled person can determine the suitable design of the slots depending on the geometry and design of the compressed air system and the length of the Ablasvoriques. This results in the width and length of the slots, as well as the blowing time and the pressure. Typically, the width of the slots is between 0.1 and 20 mm and the pressure is 0.1 to 10 bar.
  • the width of the slots also depends on the length of the slots. The longer a slot, the narrower the width of the slots to allow compressed air to escape at the required speed. Strictly speaking, there is no defined duration of exploitation. Instead, the compressed air tank is emptied suddenly.
  • the Ausblasende part of the blower is an elongated hollow profile over the length of the openings or slots are arranged.
  • This has a connection for supplying the fluid, which may be provided in principle at any point or it may also be provided over the length of the hollow profile several such connections.
  • the connection for supplying the fluid is provided at one end of the elongated hollow profile, which tapers towards the other end. Unnecessary multiple deflection of the fluid flow is thus prevented.
  • the wedge is formed by lowering the roof of the profile; but it would also be suitable for the side wall facing away from the blowout slot. So that over the entire length of the openings or slots forms a substantially equal fluid pressure during blowing, alternatively or additionally, the width of the slots can be varied over the length.
  • the hollow profile is designed as a "double wedge".
  • the profile also tapers in a further plane towards the slots. It can, for. B. fall in the direction of the end sloping roof additionally in the direction of the slots.
  • blower when the hollow section is a wedge-like tapered rectangular profile.
  • the hollow profile may be open (eg U-profile) and be directed with the open side against a surface to form the slots. But it can also be closed (eg rectangular profile) with slots. In this case, the profile must not rest on the formed as a flat surface Antrömseite.
  • the hollow section must be connected to a fluid supply via the connection.
  • a fluid supply via the connection.
  • the accumulator is a quick-closing valve, which is able by extremely fast opening times to build the necessary shock wave.
  • An optimal, that is explosive application of the fluid is ensured if no cross-sectional change takes place on the way between the pressure vessel and blow-out.
  • the intended for the passage of the fluid cross-sections of a) the sum of all openings, b) the pipe and c) of the valve are substantially equal. It is essential that the components interact in such a way that a shock wave can be generated.
  • the channel cross section of the longitudinal channels is in the range of 1 mm 2 to 200 mm 2 , preferably 4 mm 2 to 200 mm 2. With them, a favorable AP value is achieved to over 900 m 2 / m 3 .
  • a definitive definition of the cross section may, but need not, precede a dust analysis of the exhaust gas.
  • the number of longitudinal channels is expediently between 10 and 500 per m 2 inflow area.
  • the inflow area is the inflow side of the catalyst body which is located perpendicular to the inflow direction of an exhaust gas.
  • large catalyst bodies are advantageously composed of a number of catalyst elements.
  • the catalyst body can be advantageously designed as a supported catalyst in which a support body is coated with a catalytically active layer.
  • the catalyst body may also be formed as a solid extrudate.
  • the catalyst body consists exclusively of catalyst material. The production of a bulk extrudate can be carried out with the aid of an extruding machine which produces shaped bodies from a soft, plastic mass which is subsequently solidified (for example calcined).
  • the gas-free accessible surface of each channel advantageously comprises the materials titanium dioxide (TiO 2 ) to 70 to 95 wt .-%, tungsten trioxide (WO 3 ) and / or molybdenum trioxide (MoO 2 ) to 5 to 20 wt. % and vanadium pentoxide (V 2 O 5 ) to less than 5 wt .-% to.
  • TiO 2 titanium dioxide
  • WO 3 tungsten trioxide
  • MoO 2 molybdenum trioxide
  • V 2 O 5 vanadium pentoxide

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
EP11154808.7A 2010-02-17 2011-02-17 Installation de dénitruration de gaz de fumée doté d'un dispositif de soufflage d'air Withdrawn EP2357409A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201020002473 DE202010002473U1 (de) 2010-02-17 2010-02-17 Anlage zum Entsticken von Rauchgas mit einer Abblasvorrichtung

Publications (2)

Publication Number Publication Date
EP2357409A2 true EP2357409A2 (fr) 2011-08-17
EP2357409A3 EP2357409A3 (fr) 2015-07-15

Family

ID=42221383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11154808.7A Withdrawn EP2357409A3 (fr) 2010-02-17 2011-02-17 Installation de dénitruration de gaz de fumée doté d'un dispositif de soufflage d'air

Country Status (2)

Country Link
EP (1) EP2357409A3 (fr)
DE (1) DE202010002473U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107062299B (zh) * 2017-03-29 2023-06-27 济南九棵树新能源科技有限公司 一种锅炉醇基燃料专用燃烧防爆系统及主动防爆方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664865A (en) 1923-01-15 1928-04-03 Diamond Power Speciality Boiler cleaner
DE1551893A1 (de) 1967-09-06 1970-05-06 Rheinstahl Henschel Ag Russblaeser fuer Dampferzeuger mit Zuglenkwaenden aus Siederohren
DE3044820A1 (de) 1979-11-26 1981-09-17 Mitsubishi Jukogyo K.K., Tokyo Verfahren zum staubabziehen aus einem festkoerper-gaskontaktreaktor
DE3312599A1 (de) 1983-04-08 1984-10-11 Krupp-Koppers Gmbh, 4300 Essen Russblaeser zum beseitigen von ablagerungen in gasdurchstroemten raeumen, wie waermetauschern, reaktionsraeumen und dergleichen
DE3637395A1 (de) 1986-11-03 1988-05-05 Thyssen Industrie Vorrichtung zur entstickung von rauchgasen
DE19502104A1 (de) 1995-01-24 1996-07-25 Bergemann Gmbh Verfahren und Vorrichtung zum Steuern von Rußbläsern
DE19502097A1 (de) 1995-01-24 1996-07-25 Bergemann Gmbh Verfahren und Vorrichtung zum Betrieb einer Kesselanlage mit Rußbläsern
DE19603614A1 (de) 1995-02-02 1996-08-08 Hans Bergemann Führungslager für ein axial- und drehbewegliches Rußbläser-Rohr
WO1997009112A1 (fr) 1995-09-08 1997-03-13 Elex Ag Installation d'epuration des gaz de fumee
DE19533908A1 (de) 1995-09-13 1997-03-20 Gutehoffnungshuette Man Rohrwanddurchführung für eine Rußbläserlanze
DE19647868C1 (de) 1996-11-19 1998-02-26 Hans Bergemann Rußbläser

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63141630A (ja) * 1986-12-04 1988-06-14 Mitsubishi Heavy Ind Ltd 排煙処理用触媒反応装置
JPH0814367B2 (ja) * 1988-04-11 1996-02-14 三菱重工業株式会社 燃焼灰堆積防止装置
JP3293876B2 (ja) * 1992-05-06 2002-06-17 三菱重工業株式会社 触媒脱硝装置

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664865A (en) 1923-01-15 1928-04-03 Diamond Power Speciality Boiler cleaner
DE1551893A1 (de) 1967-09-06 1970-05-06 Rheinstahl Henschel Ag Russblaeser fuer Dampferzeuger mit Zuglenkwaenden aus Siederohren
DE3044820A1 (de) 1979-11-26 1981-09-17 Mitsubishi Jukogyo K.K., Tokyo Verfahren zum staubabziehen aus einem festkoerper-gaskontaktreaktor
DE3312599A1 (de) 1983-04-08 1984-10-11 Krupp-Koppers Gmbh, 4300 Essen Russblaeser zum beseitigen von ablagerungen in gasdurchstroemten raeumen, wie waermetauschern, reaktionsraeumen und dergleichen
DE3637395A1 (de) 1986-11-03 1988-05-05 Thyssen Industrie Vorrichtung zur entstickung von rauchgasen
DE19502104A1 (de) 1995-01-24 1996-07-25 Bergemann Gmbh Verfahren und Vorrichtung zum Steuern von Rußbläsern
DE19502097A1 (de) 1995-01-24 1996-07-25 Bergemann Gmbh Verfahren und Vorrichtung zum Betrieb einer Kesselanlage mit Rußbläsern
DE19603614A1 (de) 1995-02-02 1996-08-08 Hans Bergemann Führungslager für ein axial- und drehbewegliches Rußbläser-Rohr
WO1997009112A1 (fr) 1995-09-08 1997-03-13 Elex Ag Installation d'epuration des gaz de fumee
DE19533908A1 (de) 1995-09-13 1997-03-20 Gutehoffnungshuette Man Rohrwanddurchführung für eine Rußbläserlanze
DE19647868C1 (de) 1996-11-19 1998-02-26 Hans Bergemann Rußbläser

Also Published As

Publication number Publication date
DE202010002473U1 (de) 2010-05-27
EP2357409A3 (fr) 2015-07-15

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