EP0165278A1 - Process for eliminating fog from the atmosphere. - Google Patents
Process for eliminating fog from the atmosphere.Info
- Publication number
- EP0165278A1 EP0165278A1 EP85900101A EP85900101A EP0165278A1 EP 0165278 A1 EP0165278 A1 EP 0165278A1 EP 85900101 A EP85900101 A EP 85900101A EP 85900101 A EP85900101 A EP 85900101A EP 0165278 A1 EP0165278 A1 EP 0165278A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substance
- air
- area
- fog
- water
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H13/00—Dispersing or preventing fog in general, e.g. on roads, on airfields
Definitions
- the main patent (application) P 32 47 607.8 relates to a process for eliminating mist from the atmosphere by spraying a reagent into the atmosphere clouded by mist, in which the treatment is carried out by spraying a substance, preferably calcium carbide in fine distribution, with the water droplets forming the fog cloud split off a gaseous reaction product under exothermic reaction, the substance to ensure a longer-term freedom from fog in one embodiment of the invention according to the main patent one or more water-binding substances under exothermic reaction by hydrolysis and / or hydration, for example crystal water-free May contain sodium sulfate, sodium hydrophosphate, sodium carbonate, barium oxide, silicon chloride or the like.
- the object of the present invention is accordingly to provide a method and a device with the aid of which, on the basis of the method of the invention according to the main patent, it is possible to remove fog and, if necessary, to prevent limited areas from fog without leaving residues.
- the invention consists in that the air contained in the limited area is continuously sucked off and returned in a closed circuit, the air being circulated through a container containing the substance and its moisture being removed to a value below the saturation limit.
- the invention provides a method by means of which a long-lasting, time-limited and in particular preventive fog-free area areas can be achieved quickly and at low cost, no reagents being sprayed into the atmosphere and therefore also no undesired Reaction products are emitted into the atmosphere.
- a long-lasting, time-limited and in particular preventive fog-free area areas can be achieved quickly and at low cost, no reagents being sprayed into the atmosphere and therefore also no undesired Reaction products are emitted into the atmosphere.
- the fogging or Preventive effect is further enhanced by the fact that the heating of the air due to the exothermic reaction and the increase in volume caused thereby disproportionately reduces the relative air humidity and thus the water Absorbency of the air is significantly increased, whereby the fog removal, accelerated and the preventive effect against the formation of fog is further improved.
- the treatment is advantageously carried out with a metal carbide, preferably calcium carbide, via which the air in the reaction vessel is passed, the substance as an additive being an organic substance containing nitrogen and hydrogen, for example an azane, diazane , Triazane or tetraazane, an azen, diazen, triazene or tetraazene, a triazdiene or tetraazdiene, furthermore azo or diazomethane, formic acid, methyl hadrazine, oxalic acid, dimethyl peroxide, in pure form or as a salt.
- a metal carbide preferably calcium carbide
- Hydration water-binding substance preferably crystal water-free sodium sulfate, sodium hydrophospha, sodium carbonate, barium oxide, silicon chloride or the like. It is of course also possible to use a mixture of both substances, the mixture being obtained by hydrolysis or Hydration can contain water-binding substances in an amount of up to 85% by weight, preferably between 35 and 65% by weight.
- the substance can furthermore contain materials which are indifferent to water for buffering the reaction, for example alkali or alkaline earth carbonates, for example calcium carbonate or sodium carbonate.
- materials which are indifferent to water for buffering the reaction for example alkali or alkaline earth carbonates, for example calcium carbonate or sodium carbonate.
- the device for carrying out the method according to the invention consists of a system of lines comprising suction nozzles which extend in the limited area and are connected via a blower to a container for receiving the material which reacts with the humidity, to which a container is attached system of outflow openings comprising a limited area is connected.
- the suction and blowing lines in the vicinity are advantageously guided essentially parallel to one another, the suction or Outflow openings are arranged in such a way that the air is sucked out of the bounded area from a substantially horizontally extending direction and blown out into the bounded area in a substantially vertically extending direction.
- Fig. 1 is a schematic representation of a system for optional
- Fig. 2 shows another embodiment of a system for elimination of the creeping fog in a schematic representation
- FIG. 3 shows a further embodiment of a system for removing fog in a schematic illustration
- FIG. 1 An airfield apron with dimensions of 50 x 30 x 15 m (22,500 rn 3 ) should be cleared of fog for a non-fixed period of time when there is no wind.
- a fixed device is therefore installed, which - see FIG. 1 - consists of two stationary reaction containers 7 and 8, one Circulation fan 6 and a stationary, but by about 15 m height adjustable system of intake nozzles.
- Exhaust openings having suction and pressure pipes 1, 2, 3, 4, 5.
- the cables are made of plastic or light metal and are evenly distributed next to each other at a distance of approx. 8 to 10 m over the field of action.
- the tube construction is carried and shifted by a lifting device system or by a light light metal construction.
- the suction pipelines have suction ports directed downwards and the pressure pipelines have the pressure ports directed upwards, the suction and pressure pipelines being designed and assembled as twin pipes.
- the fog air is drawn in through the suction pipes of the twin pipes 1, 2, 3, 4, 5 by means of the fan 6.
- the fan can have a capacity of 22 500 Nm 3 / h or 45000 Nm 3 / h or more, depending on the time within which the defogging of the area must be ensured.
- the sucked-in air on its circulation first arrives in the reaction container 7 filled with ground carbide in order to eliminate the moisture in the mist, and then in the reaction container 8 filled with fine powdered sodium sulfate to reduce the relative humidity. It is then transferred to container 7 as clear and due to the exothermic reaction heated air is conveyed back to the treated area via the pressure pipes of the twin pipe.
- the pipes in the twin pipes have a diameter of 325 (or 460), the header pipes a diameter of 750 (or -1000) mm.
- the chemical requirement depends on the fog concentration.
- the reaction vessels have a diameter of 2000/3500 mm. Example 2;
- An airfield apron as in example 1, is to be freed of creeping fog.
- the same device as in example 1 is used, but an additional device (FIG. 2) is installed on the inflow side of the mist into the treated area, which consists of a number of suction lines 10 arranged side by side, which are connected to the suction line of a fan system and suck the air out of the corridor 11 located on the inflow side of the field to be kept free of fog.
- the suction power is dependent on the inflow speed of the creeping mist, it is calculated
- the procedure can be such that the additional device is operated on the treatment area on the inflow side of the mist with a power which covers the entire inflow quantity, on the one hand the air extracted from the upstream corridor 11 into a space located outside the treatment area 12 13 removed and on the other hand the treatment area is fogged in the manner described in Example 1.
- the method is complex and its use must be checked from case to case from an economic point of view.
- An airfield apron as in example 1, is to be preventively protected against the occurrence of fog.
- the moisture display approaches the degree of saturation of 100%.
- the same system is put into operation as in example 1, but with the aim of continuously maintaining the saturation limit of 95%.
- the fan 6 now only loads the reaction container 8.
- a soccer field 100 x 100 x 20 (200000 m 3 ) m should be misted or protected against fog.
- the same procedure is used as in FIG. 1, with the difference that the single twin tube, which can be moved upwards, is moved as a mobile system, for example mounted on a trailer with a movable stage, with a working width of 10 to 15 m in lanes over the entire working field .
- Example 5 Example 5:
- a crosswalk in the city center should be kept completely fog-free.
- the area to be fogged is 5 x 30 x 5 m (750 m 3 ).
- the nebulizer system is built up from elements in a stationary manner or a mobile unit is used. You move rectangular twin ring tubes from bottom to top and clear the passage. In the case of a long-lasting fog, the ring twin pipes are shifted in certain time periods. The air is sucked in - see FIG. 3 - by the fan 14, passed through the reaction vessel 15 and filter 16 into the pressure line of the ring twin pipe 1.
Abstract
Dans ce procédé, l'air est aspiré et ramené de manière continue dans un cycle fermé, l'humidité de cet air étant réduite jusqu'à une valeur située en-dessous de la limite de saturation. Le traitement est effectué au moyen d'un carbure métallique, de préférence du carbure de calcium, et/ou d'une substance liant de l'eau par hydrolyse ou hydratation, par exemple de l'hydrophosphate de sodium ou du sulfate de sodium anhydre, pouvant être contenu lors du mélange des deux substances en une quantité allant jusqu'à 85 % en poids, de préférence située entre 35 et 65 % en poids, dans la substance réagissant avec l'humidité condensée. L'installation se compose d'un système de conduites (1-5) contenant des tuyères d'aspiration et relié à un récipient (7, 8) servant à recevoir le matériau réagissant avec l'humidité de l'air et relié à la buse d'aspiration d'un ventilateur (6) auquel est raccordée une conduite de pression (1-5) entourant la région limitée et comportant des ouvertures d'évacuation.In this process, air is continuously sucked in and returned in a closed cycle, the humidity of this air being reduced to a value below the saturation limit. The treatment is carried out by means of a metal carbide, preferably calcium carbide, and / or a substance which binds water by hydrolysis or hydration, for example sodium hydrophosphate or anhydrous sodium sulfate. , which may be contained when mixing the two substances in an amount of up to 85% by weight, preferably between 35 and 65% by weight, in the substance reacting with condensed moisture. The installation consists of a system of pipes (1-5) containing suction nozzles and connected to a receptacle (7, 8) serving to receive the material reacting with the humidity of the air and connected to the suction nozzle of a fan (6) to which is connected a pressure line (1-5) surrounding the limited region and having discharge openings.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85900101T ATE66710T1 (en) | 1983-12-12 | 1984-12-08 | METHOD OF REMOVING FOG FROM THE ATMOSPHERE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833344809 DE3344809A1 (en) | 1983-12-12 | 1983-12-12 | METHOD AND DEVICE FOR REMOVING FOG FROM THE ATMOSPHERA |
DE3344809 | 1983-12-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0165278A1 true EP0165278A1 (en) | 1985-12-27 |
EP0165278B1 EP0165278B1 (en) | 1991-08-28 |
Family
ID=6216667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85900101A Expired - Lifetime EP0165278B1 (en) | 1983-12-12 | 1984-12-08 | Process for eliminating fog from the atmosphere |
Country Status (5)
Country | Link |
---|---|
US (1) | US4726517A (en) |
EP (1) | EP0165278B1 (en) |
JP (1) | JPS61500676A (en) |
DE (1) | DE3344809A1 (en) |
WO (1) | WO1985002637A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT403073B (en) * | 1987-06-04 | 1997-11-25 | Jordan Paul Dipl Ing | Process and high-rise building for improving the outside air, in particular city air |
US5176319A (en) * | 1990-04-12 | 1993-01-05 | Esmond & Clifford, Inc. | Method and apparatus for dispelling fog |
US5242109A (en) * | 1990-04-12 | 1993-09-07 | Esmond & Clifford, Inc. | Method and apparatus for dispelling fog |
WO1991016500A1 (en) * | 1990-04-12 | 1991-10-31 | Esmond & Clifford, Inc. | Method and apparatus for dispelling fog |
DE4012636C2 (en) * | 1990-04-20 | 1995-03-09 | Artur Kunder | Device for removing fog from traffic areas |
US7191715B2 (en) * | 2004-01-16 | 2007-03-20 | Cnh America Llc | Tandem gauge wheel assembly for planting unit |
CN113118398A (en) * | 2021-04-19 | 2021-07-16 | 山西太钢不锈钢股份有限公司 | Production method for eliminating large-grain carbide of high-carbon martensitic stainless steel continuous casting slab |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2052626A (en) * | 1933-06-05 | 1936-09-01 | Massachusetts Inst Technology | Method of dispelling fog |
GB449321A (en) * | 1934-12-18 | 1936-06-18 | Massachusetts Inst Technology | Method and apparatus for dispelling fog |
US2176851A (en) * | 1937-01-21 | 1939-10-17 | Purdue Research Foundation | Adsorbent and drying agent and process of producing it |
US2700537A (en) * | 1951-06-29 | 1955-01-25 | Robert H Henley | Humidity changer for air-conditioning |
DE1005304B (en) * | 1955-03-01 | 1957-03-28 | Robert Von Linde | Defog system for roadways, especially for runways on airfields |
BE693797A (en) * | 1966-02-08 | 1967-07-17 | ||
FR1514726A (en) * | 1966-03-25 | 1968-02-23 | Marelli & C Spa Ercole | Device for improving visibility over a limited area of the earth's surface in fog, especially above landing strips for airplanes |
US3534906A (en) * | 1967-11-20 | 1970-10-20 | Dow Chemical Co | Control of atmospheric particles |
DE2016863A1 (en) * | 1970-04-09 | 1971-10-21 | Guntheroth, Dr Ing Hans, 4323 Altendorf | Method and device for Ent misting the air over aircraft taxiways |
DE2043519A1 (en) * | 1970-09-02 | 1972-03-16 | Farbwerke Hoechst AG, vorm. Meister Lucius & Brüning, 6000 Frankfurt | Methods and means for influencing the weather |
US3766079A (en) * | 1970-10-13 | 1973-10-16 | Smith Inland A O | Exothermic composition |
DE2217338C3 (en) * | 1972-01-24 | 1980-12-04 | Cellsystem Ag, Zofingen (Schweiz) | Device for de-icing, irrigation and drainage of sports fields |
FR2199565B1 (en) * | 1972-09-15 | 1975-03-14 | France Etat | |
GB1454595A (en) * | 1974-02-15 | 1976-11-03 | Dow Chemical Co | Fog abatement |
DE2434434B1 (en) * | 1974-07-17 | 1975-06-12 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Cloud- and rain-formation device - using fans projecting air-jet obliquely or vertically upwards |
DE2703114A1 (en) * | 1977-01-26 | 1978-07-27 | Linde Ag | SYSTEM FOR THE AIR CONDITIONING OF LOCATIONS WITH A HOT CLIMATE AND FOR THE RECOVERY OF WATER WATER IN THESE LOCATIONS |
GB2048103B (en) * | 1978-07-26 | 1983-03-30 | Nat Dev Corp | Stabilisation of hygroscopic salts |
DE3228755A1 (en) * | 1982-08-02 | 1984-02-02 | Rudolf-Walter 4600 Dortmund Teuber | Method of climatic control |
DE3247607A1 (en) * | 1982-12-23 | 1984-07-05 | Zbigniew Dr. 6078 Neu-Isenburg Boguslawski | METHOD FOR REMOVING FOG FROM THE ATMOSPHERA |
-
1983
- 1983-12-12 DE DE19833344809 patent/DE3344809A1/en not_active Withdrawn
-
1984
- 1984-12-08 EP EP85900101A patent/EP0165278B1/en not_active Expired - Lifetime
- 1984-12-08 WO PCT/EP1984/000393 patent/WO1985002637A1/en active IP Right Grant
- 1984-12-08 US US07/061,002 patent/US4726517A/en not_active Expired - Fee Related
- 1984-12-08 JP JP60500156A patent/JPS61500676A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8502637A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1985002637A1 (en) | 1985-06-20 |
US4726517A (en) | 1988-02-23 |
EP0165278B1 (en) | 1991-08-28 |
DE3344809A1 (en) | 1985-06-13 |
JPS61500676A (en) | 1986-04-10 |
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