DK171015B1 - Arrangement in connection with a flue gas scrubber - Google Patents
Arrangement in connection with a flue gas scrubber Download PDFInfo
- Publication number
- DK171015B1 DK171015B1 DK113994A DK113994A DK171015B1 DK 171015 B1 DK171015 B1 DK 171015B1 DK 113994 A DK113994 A DK 113994A DK 113994 A DK113994 A DK 113994A DK 171015 B1 DK171015 B1 DK 171015B1
- Authority
- DK
- Denmark
- Prior art keywords
- flue gas
- bucket
- grate
- arrangement
- grid
- Prior art date
Links
- 239000003546 flue gas Substances 0.000 title claims description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 31
- 238000004140 cleaning Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 4
- 239000008267 milk Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006199 nebulizer Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Cleaning In General (AREA)
- Complex Calculations (AREA)
- Separating Particles In Gases By Inertia (AREA)
Description
DK 171015 B1DK 171015 B1
Opfindelsen angår et arrangement i forbindelse med en røggasvasker omfattende en skovlrist til frembringelse af rotationsbevægelse af røggasser, hvilken skovlrist er monteret på enden af en røggaskanal, der strækker sig ind i en røg-5 gasvasker, og organer til rensning af skovlristen for urenheder, der hænger fast på denne.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an arrangement in connection with a flue gas washer comprising a bucket grate for generating rotary movement of flue gases, said bucket grate mounted on the end of a flue gas duct extending into a flue gas washer, and means for cleaning the bucket grate for impurities which hangs on this one.
En såkaldt halvtør røggasvasker anvendes ofte i forbindelse med anlæg til bortskaffelse af farligt affald i Europa. I sådanne anlæg er røggasvaskning baseret på modstrømsprin-10 cippet af fx forstøvet kalkmælk og røggasser.A so-called semi-dry flue gas sink is often used in connection with plants for the disposal of hazardous waste in Europe. In such plants, flue gas washing is based on the countercurrent principle of, for example, atomized lime milk and flue gases.
Ved tidligere kendte løsninger opnås rotationsbevægelsen af røggasser i en gasvasker ved hjælp af en skovlrist anbragt for enden af en røggaskanal. Diameteren af skovlristen er fx 1500 mm. Skovlristen er stift monteret på enden af røggaska-15 nalen. Skovlene på risten ændrer strømningsretningen af en røggas, når den strømmer gennem risten, og således tilvejebringes den ønskede rotationsbevægelse af røggassen.In prior art solutions, the rotational movement of flue gases in a gas washer is achieved by means of a bucket grid located at the end of a flue gas duct. For example, the diameter of the bucket grid is 1500 mm. The bucket grate is rigidly mounted on the end of the flue gas seal. The vanes on the grate change the direction of flow of a flue gas as it flows through the grate, thus providing the desired rotary motion of the flue gas.
Det problem, der er opstået i forbindelse med ovennævnte løsning, er tilstopning af risten. Forskellige slags rens-20 ningsorganer, fx mekaniske hamre og pneumatiske pistoler, har været anvendt til at eliminere tilstopningen. På trods af ovennævnte rensningsorganer må tilførslen af affald imidlertid afbrydes omtrent hver anden eller tredje uge, anlægget skal køles ned, og skovlristen må renses manuelt. Interval-25 lerne mellem rensning kan sommetider være så korte som kun to til fire dage.The problem that has arisen in connection with the above solution is the clogging of the grate. Various types of cleaning means, for example mechanical hammers and pneumatic guns, have been used to eliminate clogging. However, despite the abovementioned purification means, the supply of waste must be interrupted approximately every two or three weeks, the plant must be cooled down and the bucket grid must be cleaned manually. The intervals between cleaning can sometimes be as short as only two to four days.
Tilstopningen af skovlristen sker af flere forskellige grunde. Fx er den aske, som afgives fra kedlen, stadig delvis smeltet og hænger fast på undersiden af skovlene. Kalkmælken, 30 som tilføres ved hjælp af en kalkmælk-fordeler, en såkaldt forstøver, bliver ikke fuldstændig forstøvet i røggassen, men begynder at ophobes som bunker på skovlristen. Selv en mindre forstyrrelse kan føre til ophobning af bunker og derved til en ændring af gasstrømningen. Ved normal drift falder de DK 171015 B1 2 aflejringer, der dannes over forstøveren, ned på skovlristen, hvilket resulterer i ophobning af bunker på skovlristen, en ændring i strømningen etc., som nævnt ovenfor.The clogging of the bucket grid is done for a variety of reasons. For example, the ash emitted from the boiler is still partially melted and adheres to the underside of the vanes. The lime milk, supplied by means of a lime-milk distributor, a so-called atomizer, is not completely atomized in the flue gas, but begins to accumulate as piles on the bucket grid. Even a minor disturbance can lead to pile accumulation and thereby a change in gas flow. In normal operation, the DK 171015 B1 2 deposits formed above the nebulizer fall onto the bucket grid, resulting in accumulation of piles on the bucket grid, a change in flow, etc., as mentioned above.
Tilstopningen af skovlristen observeres ved hjælp af auto-5 matisk styrede trykforskelsmålinger. Under normal drift er trykforskellen omtrent 1,5 mbar. Når trykforskellen er større end 4 mbar, skal risten renses.The clogging of the bucket grid is observed by means of automatically controlled pressure differential measurements. During normal operation, the pressure difference is approximately 1.5 mbar. When the pressure difference is greater than 4 mbar, the grate must be cleaned.
Ved de tidligere anvendte løsninger er skovlristen monteret stift på enden af røggaskanalen, som nævnt ovenfor. Ved disse 10 løsninger er der opstået et problem, idet de organer, som er anbragt i apparatet, fx en mekanisk hammer eller en pneumatisk pistol, ikke kan rense skovlristen tilstrækkelig godt, hvorfor anlægget må lukkes ned fra tid til anden for at blive renset.In the previously used solutions, the bucket grid is rigidly mounted on the end of the flue gas duct, as mentioned above. In these 10 solutions, a problem has arisen because the means placed in the apparatus, for example a mechanical hammer or a pneumatic gun, cannot clean the bucket grid well enough, so the system must be shut down from time to time to be cleaned.
15 Formålet med opfindelsen er at tilvejebringe et arrangement, ved hjælp af hvilket de mangler, der forekommer i den kendte teknik, kan blive afhjulpet. Dette opnås med arrangementet ifølge opfindelsen, hvilket arrangement er ejendommeligt ved, at skovlristen er monteret på enden af røggaskanalen ved 20 hjælp af eftergivelige elementer.The object of the invention is to provide an arrangement by which the deficiencies which occur in the prior art can be remedied. This is achieved with the arrangement according to the invention, which is characterized in that the bucket grate is mounted on the end of the flue gas channel by means of resilient elements.
Fordelen ved arrangementet ifølge opfindelsen er først og fremmest, at det bidrager til at hindre tilstopning af skovlristen, så det ikke er nødvendigt med manuel rensning, og at skovlristen kan renses under normal drift, eller at den endog 25 kan renses automatisk under påvirkning af røggassernes strømning. En yderligere fordel ved opfindelsen er dens enkelthed og den kendsgerning, at den på enkel vis kan anvendes i eksisterende anlæg. Indførelsen af opfindelsen er således billig.The advantage of the arrangement according to the invention is first and foremost that it helps to prevent clogging of the bucket grid so that no manual cleaning is necessary and that the bucket grid can be cleaned during normal operation or even 25 can be automatically cleaned under the influence of the flue gases. flow. A further advantage of the invention is its simplicity and the fact that it can be easily used in existing plants. Thus, the practice of the invention is inexpensive.
30 I det følgende beskrives opfindelsen ved hjælp af en fore-trukken udførelsesform illustreret på tegningen, på hvilken DK 171015 B1 3 fig. 1 generelt viser, set fra siden, et arrangement ifølge opfindelsen anbragt i en røggasvasker, fig. 2 viser, set fra siden, arrangementet ifølge opfindelsen i en større målestok, og 5 fig. 3 viser arrangementet ifølge fig. 2 set fra oven.In the following, the invention will be described by means of a preferred embodiment illustrated in the drawing, in which FIG. 1 is a side view of an arrangement according to the invention arranged in a flue gas washer; FIG. 2 is a side view of the arrangement according to the invention on a larger scale; and FIG. 3 shows the arrangement of FIG. 2 from above.
Fig. 1 viser generelt, set fra siden, et arrangement ifølge opfindelsen anbragt i en røggasvasker. Røggasvaskeren er vist med henvisningstal 1. Henvisningstal 2 angiver røggaskanalen, der strækker sig ind røggasvaskeren 1. Henvisningstal 3 10 angiver en skovlrist, som er monteret på enden af røggaskanalen 2 til frembringelse af den ønskede rotationsbevægelse af røggasserne. Henvisningstal 4 angiver organer til rensning af skovlristen 3, såsom mekaniske hamre eller pneumatiske pistoler, vist på generel måde. Strømningsretningen af røggasser i 15 røggaskanalen 2 er angivet med pilen N. Røggasvaskeren l's generelle konstruktion og virkemåde er fuldstændig kendt for en fagmand, hvorfor disse kendetegn ikke vil blive beskrevet i detaljer i denne forbindelse.FIG. 1 generally shows, in side view, an arrangement according to the invention arranged in a flue gas washer. The flue gas washer is illustrated by reference numeral 1. Reference numeral 2 indicates the flue gas extending into the flue gas detector 1. Reference numeral 3 10 indicates a bucket grid mounted on the end of the flue gas duct 2 to produce the desired rotary motion of the flue gases. Reference numeral 4 denotes means for cleaning the bucket grid 3, such as mechanical hammers or pneumatic guns, shown in a general way. The direction of flow of flue gases in the flue gas duct 2 is indicated by arrow N. The general design and operation of the flue gas washer 1 is fully known to one of ordinary skill in the art, so these features will not be described in detail in this connection.
Fig. 2 og 3 viser arrangementet ifølge opfindelsen i en 20 større målestok. I fig. 2 og 3 er tilsvarende dele angivet med samme henvisningstal som i fig. 1.FIG. 2 and 3 show the arrangement according to the invention on a larger scale. In FIG. 2 and 3, corresponding parts are indicated by the same reference numerals as in FIG. First
Ifølge opfindelsens grundlæggende idé er skovlristen 3 monteret på enden af røggaskanalen 2 ved hjælp af eftergivelige elementer 5. De eftergivelige elementer kan fx være fjedre, 25 der fortrinsvis er fremstillet af metal. Når skovlristen 3 er monteret på de eftergivelige elementer 5, vibreres den på en sådan måde, at de urenheder, som hænger fast på den, falder af under røggasrensningen. Derved undgår man nedlukning af hele anlægget eller manuel rensning af risten.According to the basic idea of the invention, the bucket grate 3 is mounted on the end of the flue gas duct 2 by means of resilient elements 5. The resilient elements may, for example, be springs, preferably made of metal. When the bucket grid 3 is mounted on the resilient elements 5, it is vibrated in such a way that the impurities which hang on it fall off during the flue gas cleaning. This avoids shutdown of the entire system or manual cleaning of the grate.
30 Skovlristen 3 kan renses fx ved hjælp af en mekanisk hammer 6. Den mekaniske hammer 6 omfatter fx en elektrisk vibrator 7 og en slagstang 8. Vibratoren 7 bevæger slagstangen 8 frem og DK 171015 B1 4 tilbage, som vist med pilen M. Slagstangen 8's frie ende er anbragt således, at den støder imod en forstærket ambolt 9, der er monteret på skovlristen 3, hvorved skovlristen begynder med at vibrere, og de urenheder, som hænger fast på 5 den, falder af. Eftersom skovlristen 3 er monteret på de eftergivelige elementer 5, er hammeren 6's virkning meget mere effektiv end i de tidligere kendte løsninger. Dette skyldes, at arrangementet ifølge opfindelsen får skovlristen til at vibrere effektivt. I tidligere kendte løsninger har 10 virkningen af en mekanisk hammer eller en bankeindretning været utilstrækkelig, da skovlristen har været en stiv del af røggaskanalen, hvorfor der ikke er blevet frembragt tilstrækkelig vibration.The bucket grate 3 can be cleaned, for example, by means of a mechanical hammer 6. The mechanical hammer 6 comprises, for example, an electric vibrator 7 and a stroke 8. The vibrator 7 moves the stroke 8 forward and DK 171015 B1 4 as shown by the arrow M. Stroke 8's the free end is arranged so that it bumps against a reinforced anvil 9 mounted on the bucket grate 3, whereby the bucket grate begins to vibrate and the impurities attached to it 5 fall off. Since the bucket grate 3 is mounted on the resilient elements 5, the action of the hammer 6 is much more effective than in the prior art solutions. This is because the arrangement according to the invention causes the bucket grid to vibrate effectively. In prior art solutions, the action of a mechanical hammer or a knocking device has been insufficient, as the bucket grate has been a rigid part of the flue gas duct, so that sufficient vibration has not been produced.
Ved at udforme de eftergivelige elementer 5 på en passende 15 måde, kan vibration af den på de eftergivelige elementer monterede skovlrist 3 frembringes selv ved den blotte påvirkning fra røggassernes strømning N. Det skal bemærkes, at røggassernes strømningshastighed er relativ høj, fx omkring 11 m/s. Når skovlristen bevæger sig på de eftergivelige 20 elementer 5, renser den således hele tiden sig selv.By designing the resilient elements 5 in a suitable manner, vibration of the bucket 3 mounted on the resilient elements can be produced even by the mere influence of the flue gas flow N. It should be noted that the flue gas flow rate is relatively high, e.g. / s. Thus, when the bucket grid moves on the resilient elements 5, it constantly cleanses itself.
Det er ikke hensigten, at den ovenfor beskrevne udførelsesform skal begrænse opfindelsen, idet opfindelsen fuldstændig frit kan modificeres inden for kravenes omfang. Det er således indlysende, at arrangementet ifølge opfindelsen eller 25 delene deraf ikke nødvendigvis behøver at være identisk med dem, der er vist på tegningen; andre løsninger er også mulige. De eftergivelige elementer kan være en hvilken som helst form for egnede elementer, fx spiralfjedre, bladfjedre, torsionsstænger, eftergivelige stangelementer osv.. Antallet 30 af eftergivelige elementer er heller ikke begrænset, men kan vælges frit i hvert tilfælde, fx i overensstemmelse med dimensionerne af røggaskanalen og skovlristen. Organerne til rensning af skovlristen kan også være en hvilken som helst form for i og for sig kendte organer; tegningen viser blot et 35 eksempel.The embodiment described above is not intended to limit the invention, since the invention can be completely freely modified within the scope of the claims. Thus, it is obvious that the arrangement according to the invention or the parts thereof need not necessarily be identical to those shown in the drawing; other solutions are also possible. The resilient elements may be any form of suitable elements, e.g., coil springs, leaf springs, torsion bars, resilient rod elements, etc. The number of resilient elements is also not limited, but can be freely selected in each case, e.g., according to the dimensions of the flue gas duct and bucket grate. The means for cleaning the bucket grid can also be any kind of means known per se; the drawing shows just one example.
Claims (2)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI921439A FI89770C (en) | 1992-04-01 | 1992-04-01 | ANORDNING VID ROEKGASRENINGSAPPARAT |
| FI921439 | 1992-04-01 | ||
| PCT/FI1993/000115 WO1993019834A1 (en) | 1992-04-01 | 1993-03-23 | Arrangement in connection with a flue gas scruber |
| FI9300115 | 1993-03-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK113994A DK113994A (en) | 1994-09-30 |
| DK171015B1 true DK171015B1 (en) | 1996-04-22 |
Family
ID=8535018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK113994A DK171015B1 (en) | 1992-04-01 | 1994-09-30 | Arrangement in connection with a flue gas scrubber |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU3754293A (en) |
| DE (1) | DE4391334T1 (en) |
| DK (1) | DK171015B1 (en) |
| FI (1) | FI89770C (en) |
| NL (1) | NL194116C (en) |
| SE (1) | SE507678C2 (en) |
| WO (1) | WO1993019834A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107676489B (en) * | 2017-10-12 | 2019-04-19 | 江苏广鸿环境工程有限公司 | The automatic Load of ultra-clean demister adjusts device in a kind of desulfurizing tower |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1083283B (en) * | 1956-11-05 | 1960-06-15 | Anciens Etablissements R Velut | Trickle cooler |
| DE1719526C3 (en) * | 1968-03-13 | 1972-03-09 | Siemens Ag | Rotary flow vortex for separating adhesive liquids from gases |
| US3996317A (en) * | 1974-11-04 | 1976-12-07 | Universal Oil Products Company | Gas-liquid scrubber with resilient flexible grids |
-
1992
- 1992-04-01 FI FI921439A patent/FI89770C/en active
-
1993
- 1993-03-23 NL NL9320029A patent/NL194116C/en not_active IP Right Cessation
- 1993-03-23 DE DE4391334T patent/DE4391334T1/en not_active Withdrawn
- 1993-03-23 WO PCT/FI1993/000115 patent/WO1993019834A1/en active Application Filing
- 1993-03-23 AU AU37542/93A patent/AU3754293A/en not_active Abandoned
-
1994
- 1994-09-23 SE SE9403215A patent/SE507678C2/en not_active IP Right Cessation
- 1994-09-30 DK DK113994A patent/DK171015B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| SE507678C2 (en) | 1998-07-06 |
| AU3754293A (en) | 1993-11-08 |
| NL194116B (en) | 2001-03-01 |
| FI89770C (en) | 1993-11-25 |
| FI89770B (en) | 1993-08-13 |
| SE9403215D0 (en) | 1994-09-23 |
| FI921439A0 (en) | 1992-04-01 |
| NL9320029A (en) | 1995-01-02 |
| SE9403215L (en) | 1994-09-23 |
| WO1993019834A1 (en) | 1993-10-14 |
| NL194116C (en) | 2001-07-03 |
| DK113994A (en) | 1994-09-30 |
| DE4391334T1 (en) | 1995-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |
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