EP0036445A2 - Procédé pour réduire les dégâts dus à la corrosion - Google Patents

Procédé pour réduire les dégâts dus à la corrosion Download PDF

Info

Publication number: EP0036445A2
Authority: EP; European Patent Office
Prior art keywords: fire; corrosion inhibitors; inhibitor; fighting; corrosion
Prior art date: 1980-03-24
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

Application number

EP80107473A

Other languages

German (de)

English (en)

Other versions

EP0036445B1 (fr

EP0036445A3 (en

Inventor

Giancarlo Dr. Pini

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.)

Sulzer AG

Original Assignee

Sulzer AG

Gebrueder Sulzer AG

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.)

1980-03-24

Filing date

1980-11-29

Publication date

1981-09-30

1980-11-29 Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG

1980-11-29 Priority to AT80107473T priority Critical patent/ATE5510T1/de

1981-09-30 Publication of EP0036445A2 publication Critical patent/EP0036445A2/fr

1981-11-04 Publication of EP0036445A3 publication Critical patent/EP0036445A3/de

1983-12-07 Application granted granted Critical

1983-12-07 Publication of EP0036445B1 publication Critical patent/EP0036445B1/fr

Status Expired legal-status Critical Current

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Classifications

- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires

Definitions

the invention relates to a method for reducing corrosion damage in closed rooms equipped with fire alarm and / or fire-fighting systems.
the object of the invention is to keep the corrosion damage as a result of fires and their control as low as possible: In closed rooms with fire alarm and / or fire-fighting systems, this object is achieved in a simple manner in that corrosion inhibitors are distributed in a finely divided form in the room during and / or after the fire-fighting.
the concentration of inhibitor substance is generally about 10 to 10 0 mg / m 3 .
the inhibitors can advantageously be distributed in the rooms to be protected via the extinguishing agent distribution network of a fire-fighting system, it being possible for the inhibitor substances, for example, to be added to the extinguishing agent supply as an additional component or to be fed into the outflowing extinguishing agent stream.
the distribution of the corrosion inhibitors or their on Feeding into the extinguishing agent flow can advantageously take place somewhat delayed in relation to or within the extinguishing agent flow, so that a certain fire-fighting effect has already occurred during its distribution and / or the first corrosion-promoting and aggressive substances, which are mainly in the form of liquid , mostly aqueous solutions occur.
a feed point 4 is provided in line 3, at which corrosion inhibitors are fed into the outflowing extinguishing agent stream, in this case injected.
the feed point 4, which is shown in more detail in FIG. 2, is connected to an inhibitor container 5, which is shown in FIG. 3 is explained in more detail.
a pressure compensation line 6 leads from the inhibitor container 5 back into the distribution line 3 for the extinguishing agent and opens into this upstream of the feed point 4.
the wall of the line is provided with a bore 7 (FIG. 2), over which a tubular sleeve 8 is welded; this carries a thread 9, into which a nozzle 11 provided with a bore 10 is screwed.
the nozzle 11 has a step-like shoulder with a larger diameter, which carries a further thread 12 on the inside and is supported on the free end of the sleeve 8.
a pin 14 (FIG. 3) provided with the corresponding counter thread engages in the thread 12 and protrudes from the bottom of the housing 15 of the inhibitor container 5.
the pin 14 also has a central bore 16 which connects the interior of the inhibitor container 5 with the bore 10 of the nozzle 11.
the housing 15 is closed by a screw cap 7, into which the already mentioned pressure compensation line 6 (FIG. 1) opens on the back of a piston 19 loaded with a spring 18.
the inhibitor solution 24 is enclosed in a bag 20 made of plastic film between the bottom of the vessel 15 and the front of the piston 19.
a groove 21 which surrounds the bore 16 and is designed with ceramic insulating material and into which an electrical heating wire 22 is inserted on about 3/4 of its circumference. This is used to melt the bag 20 and is connected to an electrical unit 25 via leads, not shown, which are laid in bores 23 in the bottom of the housing 15, which is only indicated schematically and is also screwed into the bottom of the housing 15; it contains a control unit and an energy source for supplying the heating wire 22.
the control unit can be controlled, for example, from a fire control center or from a pressure detector on one of the gas bottles; it then triggers a closure of the power supply for the heating wire 22, through which the bag is melted on part of its surface surrounding the bore 16 and the inhibitor solution 1 is released.
the piston 19 moved by the previously tensioned spring 18 against the bottom of the housing 15 ejects the inhibitor liquid in a relatively short time.
This consists, for example, of an aqueous morpholine solution in a concentration of 40 g / l; the amount contained in the inhibitor container 5 is so large that approximately up to 100, in particular 25 to 50 mg of inhibitor substance are available per m 3 of the protective space.
the inhibitor container thus contains approximately 0.5 to 1.0 l of liquid.
the inhibitor solution 24 can be fed into the outflowing extinguishing agent flow at any time of the extinguishing agent flow, which lasts up to 10 seconds, and should be ended in time so that the extinguishing agent flow causes the desired fine distribution of the inhibitor before it dries up.
the schematically represented room 30 (FIG. 4) is only protected in the event of a fire by a fire alarm system, the fire detectors 31 of which are connected to a fire alarm control center 33 via electrical signal lines 32.
a separate distribution network is therefore provided for the distribution of the inhibitors; This consists of distribution stations 34 arranged on the ceiling of the room, which are also connected to the fire alarm control panel 33 by electrical signal lines 35.
a commercially available piezoceramic atomizer 36 (FIG. 5) is provided as the distribution element, in which the inhibitor liquid is atomized into a fine mist by means of an electrical oscillating circuit.
An inhibitor container 5 of the type already described is connected to this atomizer 36 via a line 37.
control elements contained in block 38 trigger the atomization of the inhibitor solution as soon as they themselves are excited, for example via signal line 35 (FIG. 4).
an aqueous solution of thiourea of which 40 g have been dissolved in one liter, serves as the inhibitor solution.
the amount of the total inhibitor present in all distribution stations 34 of a room 30 is again at least approximately that much that 20 to 50 mg of inhibitor can be distributed in room 30 per m 3 of room content.

Landscapes

Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Business, Economics & Management (AREA)
Emergency Management (AREA)
Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Preventing Corrosion Or Incrustation Of Metals (AREA)

EP80107473A 1980-03-24 1980-11-29 Procédé pour réduire les dégâts dus à la corrosion Expired EP0036445B1 (fr)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
AT80107473T ATE5510T1 (de)	1980-03-24	1980-11-29	Verfahren zur verminderung von korrosionsschaeden.

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
CH226880A CH642854A5 (de)	1980-03-24	1980-03-24	Verfahren zur verminderung von korrosionsschaeden waehrend und/oder nach der brandbekaempfung in raeumen.
CH2268/80		1980-03-24

Publications (3)

Publication Number	Publication Date
EP0036445A2 true EP0036445A2 (fr)	1981-09-30
EP0036445A3 EP0036445A3 (en)	1981-11-04
EP0036445B1 EP0036445B1 (fr)	1983-12-07

Family

ID=4229786

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP80107473A Expired EP0036445B1 (fr)	1980-03-24	1980-11-29	Procédé pour réduire les dégâts dus à la corrosion

Country Status (4)

Country	Link
EP (1)	EP0036445B1 (fr)
AT (1)	ATE5510T1 (fr)
CH (1)	CH642854A5 (fr)
DE (1)	DE3065846D1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3409550A (en) *	1965-12-30	1968-11-05	Shell Oil Co	Fire retardant compositions
US3637022A (en) *	1969-10-30	1972-01-25	Marathon Oil Co	Use of high water content oil-external micellar solutions for extinguishing fires
AT314363B (de) *	1971-07-09	1974-04-10	Horst Juwig	Anlage zur Stützenkühlung von Stahlstützen eines Gebäudetraggestells
US3939914A (en) *	1972-11-17	1976-02-24	Carroll John L	Combination air conditioning and fire protection system for a building
FR2270402A1 (en) *	1974-05-07	1975-12-05	Darlix Georges	Fire fighting system for tall building - has distributor pipes for jets forming curtain of water over windows
DE2714902A1 (de) *	1977-04-02	1978-10-12	Hoechst Ag	Verbessertes schaumerzeugendes konzentrat fuer feuerloeschzwecke
US4176071A (en) *	1978-06-26	1979-11-27	Early California Industries, Inc.	Corrosion inhibitor mixture for ammonium sulfate fire-retardant compositions and method for inhibiting corrosivity of such compositions

1980
- 1980-03-24 CH CH226880A patent/CH642854A5/de not_active IP Right Cessation
- 1980-11-29 DE DE8080107473T patent/DE3065846D1/de not_active Expired
- 1980-11-29 AT AT80107473T patent/ATE5510T1/de not_active IP Right Cessation
- 1980-11-29 EP EP80107473A patent/EP0036445B1/fr not_active Expired

Also Published As

Publication number	Publication date
ATE5510T1 (de)	1983-12-15
EP0036445B1 (fr)	1983-12-07
DE3065846D1 (en)	1984-01-12
CH642854A5 (de)	1984-05-15
EP0036445A3 (en)	1981-11-04

Legal Events

Date	Code	Title	Description
1981-08-01	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
1981-09-03	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1981-09-30	17P	Request for examination filed	Effective date: 19801129
1981-09-30	AK	Designated contracting states	Designated state(s): AT BE DE FR GB NL
1981-11-04	AK	Designated contracting states	Designated state(s): AT BE DE FR GB NL
1983-10-08	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1983-12-07	AK	Designated contracting states	Designated state(s): AT BE DE FR GB NL
1983-12-07	REF	Corresponds to:	Ref document number: 5510 Country of ref document: AT Date of ref document: 19831215 Kind code of ref document: T
1984-01-12	REF	Corresponds to:	Ref document number: 3065846 Country of ref document: DE Date of ref document: 19840112
1984-01-20	ET	Fr: translation filed
1984-10-08	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1984-10-08	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1984-11-22	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 19841122 Year of fee payment: 5
1984-11-27	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 19841127 Year of fee payment: 5
1984-12-12	26N	No opposition filed
1984-12-31	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: BE Payment date: 19841231 Year of fee payment: 5
1986-11-26	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: AT Payment date: 19861126 Year of fee payment: 7
1987-11-30	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: NL Payment date: 19871130 Year of fee payment: 8
1988-11-29	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Effective date: 19881129 Ref country code: AT Effective date: 19881129
1988-11-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: BE Effective date: 19881130
1989-05-31	BERE	Be: lapsed	Owner name: GEBRUDER SULZER A.G. Effective date: 19881130
1989-06-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: NL Effective date: 19890601
1989-07-17	NLV4	Nl: lapsed or anulled due to non-payment of the annual fee
1989-07-26	GBPC	Gb: european patent ceased through non-payment of renewal fee
1989-07-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19890731
1989-08-01	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Effective date: 19890801
1989-09-22	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST

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