CS251967B1 - Steam ejector for decontamination of tubes',pipelines' and vessels' inside surfaces by means of steam,steam-emulsion and steam-aerosol mixture - Google Patents
Steam ejector for decontamination of tubes',pipelines' and vessels' inside surfaces by means of steam,steam-emulsion and steam-aerosol mixture Download PDFInfo
- Publication number
- CS251967B1 CS251967B1 CS85453A CS45385A CS251967B1 CS 251967 B1 CS251967 B1 CS 251967B1 CS 85453 A CS85453 A CS 85453A CS 45385 A CS45385 A CS 45385A CS 251967 B1 CS251967 B1 CS 251967B1
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- Czechoslovakia
- Prior art keywords
- steam
- decontamination
- ejector
- space
- emulsion
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- 238000005202 decontamination Methods 0.000 title claims abstract description 18
- 230000003588 decontaminative effect Effects 0.000 title claims abstract description 17
- 239000000443 aerosol Substances 0.000 title claims abstract description 6
- 239000000839 emulsion Substances 0.000 title claims abstract description 6
- 239000000203 mixture Substances 0.000 title claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 210000003128 head Anatomy 0.000 claims abstract 3
- 210000001061 forehead Anatomy 0.000 claims abstract 2
- 238000005192 partition Methods 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- 229910021653 sulphate ion Inorganic materials 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 6
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000002925 chemical effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Nozzles (AREA)
Abstract
Riešenie >sa týká parného ejektora, t. j. rozprašovača na dekontamináciu vnútorných povrchov trubiek, potrubia a nádob parou, parno - emulznou a parno - aerosolovou zmesou. Podstatou je hlavica, ktorú tvoří teleso a čelo. Teleso ejektora obsahuje parný priestor, napojený parnou hadicou na zdroj páry a aspoň jeden kvapalinový priestor, napojený kvapalinovou hadicou na zásobník dekontaminačného roztoku. Parný priestor ústi do okolia hlavice kruhovou parnou štrbinou. Parná štrbina je vymedzená na jednej straně čelom a na druhej straně okrajom telesa. Do parnej štrbiny ústi najmenej jeden kvapalinový priestor najmenej jednou kvapalinovou štrbinou.The solution> relates to a steam ejector, i. j. atomizers for internal decontamination pipe, pipe and vessel surfaces, steam-emulsion and steam-aerosol mixture. The essence is the head that forms the body and forehead. The ejector body contains steam space, connected by steam hose to the source vapor and at least one fluid space, connected liquid hose on the container decontamination solution. Steam room flows into the surroundings of the head with a circular steam slot. The steam slot is defined at one side face and on the other side edge body. At least the vapor gap is at least one liquid space at least once a fluid gap.
Description
Vynález sa týká parného ejektora, t. j. rozprašovače na dekontamináciu vnútorných povrchov trubiek potrubla a nádob parou, parno - emulznou a parno - aerosolovou zmesou hlavně v jadrovo - energetických zariadeniach, ako aj na různých iných pracoviskách s otvorenými rádioaktívnymi žiaričmi.The invention relates to a steam ejector, i. j. atomizers for the decontamination of the inner surfaces of pipes and vessels by steam, vapor-emulsion and vapor-aerosol mixtures, mainly in nuclear power plants, as well as in various other workplaces with open radioactive emitters.
Vnútorné povrchy potrubí, trubiek a nádob sa doteraz dekontaminovali parou a parno - emulznou či parno - aerosolovou zmesou pomocu ejetkorov s jednoduchou, alebo i trojitou rozprašovacou tryskou, avšak každá tryska bola opatřená iba rozprašovacím otvorom. V důsledku toho takáto tryska zmes rozprašovaného dekontaminačného roztoku s parou iba rozprašovala a vůbec nevyužívala mechanického účinku páry na dekontaminačný proces, ktorý ako je všeobecne známe, može byť za určitých okolností velmi významný.The inner surfaces of pipes, tubes and containers have so far been decontaminated with steam and a vapor emulsion or vapor-aerosol mixture using ejectors with a single or triple spray nozzle, but each nozzle was provided with only a spray orifice. Consequently, such a nozzle only sprayed the mixture of atomized decontamination solution with steam and did not exploit the mechanical effect of steam on the decontamination process, which, as is well known, can be very significant in certain circumstances.
Tento závažný nedostatok odstraňuje parný ejektor podlá předloženého vynálezu, ktorého podstata je v tom, že jeho parný priestor ústí do okolia hlavice kruhovou parnou štrbinou vymedzenou na jednej straně čelom a na druhej straně okrajom telesa a do parnej štrhiny ústi najmenej jeden kvapalinový priestor najmenej jednou kruhovou kvapalinovou štrbinou.This serious drawback is overcome by the steam ejector according to the present invention, which is characterized in that its steam space opens into the vicinity of the head by a circular steam gap defined on one side by the face and on the other side by the body edge and at least one liquid space opens into the steam gap. the liquid slit.
Na rozdiel od doteraz používaných parných ejektorov navrhovaný parný ejektor nemá trysku s malým „bodovým“ otvorom, ale vo formě kruhovej štrhiny. Táto štrbina rozvádza vysoko účinný dekontaminačný efekt páry na všetky strany hlavice ejektora. Tohoto efektu je obzvlášť možno účinné využiť pri dekontaminácii vnútorných povrchov kontaminovaných trubiek, potrubí a různých nádob a nádrží. Aby bola zistená správná funkcia ejektoru s kruhovou parnou štrbinou, musí do nej ústiť kvapalinový priestor nie „bodovým“ alebo „úsečkovým“ otvorom, ale kruhovou kvapalinovou štrbinou.Unlike previously used steam ejectors, the proposed steam ejector does not have a nozzle with a small "point" orifice, but in the form of a circular slit. This slit distributes the highly effective decontamination effect of steam to all sides of the ejector head. This effect is particularly effective in decontaminating the inner surfaces of contaminated tubes, pipes and various vessels and tanks. In order to determine the correct functioning of the ejector with a circular vapor gap, the liquid space must enter into it not by a "point" or "line" opening, but by a circular liquid gap.
Parný ejektor podlá tohoto vynálezu umožňuje teda okrem rozprašovania dekontaminačného roztoku a jeho chemického a fyzikálneho účinku aj mechanický účinok prúdu ostrej páry v celom priereze trúbky, potrubia a nádob súčasne. Možnost využitia všetkých uvedených efektov súčasne sa zákonité prejaví na podstatnom zvýšení dekontaminačného· účinku a tým aj dekontaminačného faktora.Thus, in addition to spraying the decontamination solution and its chemical and physical effect, the steam ejector of the present invention also allows the mechanical effect of the jet of vapor across the cross-section of the tube, pipe and vessel simultaneously. The possibility of utilizing all of the above-mentioned effects simultaneously will inevitably result in a substantial increase in the decontamination effect and hence the decontamination factor.
Příklad parného ejektora podlá vynálezu je znázorněný na priloženom výkrese.An example of a steam ejector according to the invention is shown in the attached drawing.
Ide o parný ejektor, ktorého kovová hlavica 1 obsahuje teleso 2 a čelo 3. Teleso 2 tvoria dve trúbky sústredene do seba zasadené. K parnému priestoru 4 hlavice patří priestor vo vnútornej trúbke, napojenej polopružnou hrubšou hadicou 5 na zdroj pa- ry 6.It is a steam ejector, the metal head 1 of which comprises a body 2 and a face 3. The body 2 consists of two tubes which are concentrically arranged in each other. The steam space 4 of the head includes a space in the inner tube, connected by a semi-flexible thicker hose 5 to the steam source 6.
Kvapalinovým priestorom 7 hlavice 1 je medzipriestor medzi obidvoma trubkami. Tento je v zadnej časti zaslepený a napojený polopružnou tenšou kvapalinovou hadicou 8 na zásobník 9 dekontaminačného roztoku.The liquid space 7 of the head 1 is the space between the two tubes. This is blinded at the rear and connected by a semi-flexible thinner liquid hose 8 to the container 9 of the decontamination solution.
Čelné konce obidvoch trubiek telesa 2 majú okraje v jednej rovině a sú čiastočne prehradené v medzipriestore tak, že medzi nimi zostáva iba úzká kruhová kvapalinová štrbina 11 ústiaca do parnej štrhiny 10.The front ends of the two tubes of the body 2 have edges in one plane and are partially obstructed in the interspace so that only a narrow annular liquid slot 11 extends into the steam slot 10 between them.
Parná štrbina 10 je vymedzená na jednej straně čelnými koncami spomínaných trubiek a na druhej straně dnom čela 3. Přitom poloměr najváčšieho zúženia parnej štrhiny 10 musí byť o niečo menší, ako je poloměr kvapalinovej štrhiny 11, aby bolo, zaistené samovolné nasávanie kvapaliny prúdom páry.The vapor gap 10 is defined on one side by the end ends of said tubes and on the other side by the bottom of the face 3. The radius of the greatest narrowing of the vapor slit 10 must be slightly smaller than the radius of the liquid slit 11 to ensure spontaneous suction.
Parná štrbina 10 súvlsí s parným priestorom 4, ktorý je prehradený perforovanou přepážkou 12, do ktorej je zaskrutkovaná skrutka 13 čela 3.The steam slot 10 is adjacent to the steam space 4, which is enclosed by a perforated partition 12 into which the screw 13 of the face 3 is screwed.
Hlavica 1 sa s hadicami zasunie do kontaminované]' trúbky, potrubia, alebo nádoby. Zo zdroja páry 6 sa vpustí do hlavice 1 para pod tlakom, ktorá prúdi parnou štrbinou 10 kolmým smerom na vnútorný povrch potrubia, trúbky, alebo nádoby.The head 1 is inserted with the hoses into a contaminated tube, pipe or vessel. From the steam source 6, steam is admitted to the head 1 under pressure, which flows through the steam gap 10 perpendicular to the inner surface of the pipe, tube or vessel.
Přitom prúdiaca para v parnej štrbine 10 vytvára podtlak v okolí ústia kvapalinovej štrhiny 11 a tým nasáva dekontaminačný roztok zo zásobníka 9 kvapalinovou hadicou 8 do kvapalinového priestoru 7 kvapalinovou štrbinou 11 do parnej štrhiny 10, kde sa dekontaminačný roztok rozprašuje parou a zanáša do kontaminované] trúbky, potrubia, alebo, nádoby. Tam potom táto parná emulzia, alebo parný aerosol působí chemicky a fyzikálno - chemicky na kontaminovaný povrch.In this case, the steam flow in the steam gap 10 creates a vacuum around the mouth of the liquid gap 11 and thereby draws the decontamination solution from the reservoir 9 through the liquid hose 8 into the liquid space 7 through the liquid gap 11 into the steam gap 10. , pipes, or vessels. There the steam emulsion or steam aerosol acts chemically and physically - chemically on the contaminated surface.
Para svojim silným mechanickým účinkom odstraňuje hlavně slabo viazané podiely rádioaktívnej kontaminácie, ale tiež aj také podiely, ktoré boli uvolněné působením dekontaminačného roztoku. Týmto sa dosiahne dekontaminácia vnútorných povrchov hlavně u trubiek, potrubí a nádob podstatné a nezrovnatelne účinnejšia, ako dekontaminácia s použitím doterajších parných ejektorov. Přitom parný ejektor podlá vynálezu je jednoduchý, jeho výroba je poměrně 1'ahká a nie je nákladná.Due to its strong mechanical action, steam removes mainly weakly bound fractions of radioactive contamination, but also those fractions which have been released by the decontamination solution. In this way, the decontamination of the inner surfaces, in particular in tubes, pipes and vessels, is substantially and incomparably more efficient than decontamination using the prior art steam ejectors. The steam ejector according to the invention is simple, it is relatively easy to manufacture and not expensive.
Vynález može byť použitý v jadrovo - energetických zariadeniach, zvlášť pri dekontaminácii trubiek, napr. parogenerátorov ako aj iných potrubných systémov, nádob, nádrží a podobné. Dá sa tiež výhodné použit i pri dekontaminácii jaderných elektrární určených k likvidácii.The invention can be used in nuclear power plants, in particular in the decontamination of pipes, e.g. steam generators as well as other piping systems, vessels, tanks and the like. It can also be used advantageously for decontamination of nuclear power plants for disposal.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS85453A CS251967B1 (en) | 1985-01-23 | 1985-01-23 | Steam ejector for decontamination of tubes',pipelines' and vessels' inside surfaces by means of steam,steam-emulsion and steam-aerosol mixture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS85453A CS251967B1 (en) | 1985-01-23 | 1985-01-23 | Steam ejector for decontamination of tubes',pipelines' and vessels' inside surfaces by means of steam,steam-emulsion and steam-aerosol mixture |
Publications (2)
Publication Number | Publication Date |
---|---|
CS45385A1 CS45385A1 (en) | 1986-12-18 |
CS251967B1 true CS251967B1 (en) | 1987-08-13 |
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Application Number | Title | Priority Date | Filing Date |
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CS85453A CS251967B1 (en) | 1985-01-23 | 1985-01-23 | Steam ejector for decontamination of tubes',pipelines' and vessels' inside surfaces by means of steam,steam-emulsion and steam-aerosol mixture |
Country Status (1)
Country | Link |
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CS (1) | CS251967B1 (en) |
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1985
- 1985-01-23 CS CS85453A patent/CS251967B1/en unknown
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Publication number | Publication date |
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CS45385A1 (en) | 1986-12-18 |
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