PL102761B1 - DEVICE FOR DYNAMIC TESTING THE EFFICIENCY OF METHYL IODIDE FILTRATION BY RADIOACTIVE IODINE THROUGH LIBER FILTERS AND SORPTION MATERIALS - Google Patents

DEVICE FOR DYNAMIC TESTING THE EFFICIENCY OF METHYL IODIDE FILTRATION BY RADIOACTIVE IODINE THROUGH LIBER FILTERS AND SORPTION MATERIALS Download PDF

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Publication number
PL102761B1
PL102761B1 PL19922877A PL19922877A PL102761B1 PL 102761 B1 PL102761 B1 PL 102761B1 PL 19922877 A PL19922877 A PL 19922877A PL 19922877 A PL19922877 A PL 19922877A PL 102761 B1 PL102761 B1 PL 102761B1
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Poland
Prior art keywords
methyl iodide
sleeve
air
reducer
filters
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PL19922877A
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Polish (pl)
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PL199228A1 (en
Inventor
Jerzy Krzesniak
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Ts Lab Ochrony Radiologicznej
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Priority to PL19922877A priority Critical patent/PL102761B1/en
Publication of PL199228A1 publication Critical patent/PL199228A1/en
Publication of PL102761B1 publication Critical patent/PL102761B1/en

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  • Sampling And Sample Adjustment (AREA)

Description

Przedmiotem wynalazku jest urzadzenie do badan dynamicznych sprawnosci filtracji jodku metylu znaczonego jodem promieniotwórczym przez filtry wlókniste i materialy sorpcyjne stosowane zwlaszcza w obiektach techniki jadrowej dla celów ochrony srodowiska jak: oczyszczanie gazów odlotowych usuwanych z reaktora jadrowego do atmosfery, oczyszczanie wdychanego powietrza w maskach ochronnych uzywanych na stanowiskach pracy oraz do poboru i kontroli zanieczyszczen powietrza.The subject of the invention is a device for dynamic testing of filtration efficiency radioiodine labeled with radioiodine through fiber filters and sorption materials used especially in nuclear technology facilities for the purposes of environmental protection, such as: purification of waste gases discharged from the nuclear reactor to the atmosphere, cleaning the inhaled air in protective masks used at workplaces and for air pollution collection and control.

Stan techniki. Znane urzadzenia do badan sprawnosci filtracji jodku metylu skladaja sie ze: zbiornika na sprezona do kilku atmosfer mieszanine jodku metylu z powietrzem, komory mieszania, glowicy, w której umieszcza sie badane materialy, filtru zabezpieczajacego i pompy membranowej.State of the art. Known devices for testing methyl iodide filtration efficiency consist of: a mixture of methyl iodide with air compressed to several atmospheres, a mixing chamber, a head in which the test materials, the safety filter and the diaphragm pump are placed.

W przypadku badania materialów sorpcyjnych, jak wegiel aktywny i sorbenty nieorganiczne, glowica wykonana jest w postaci rury szklanej, w której umieszcza sie kilka warstw wegla, oddzielonych od siebie siatkami stalowymi i zabezpieczonych sprezynkami stalowymi. Grubosci warstw badanych materialów w znanych urzadzeniach wynosza okolo 5 cm. Przygotowanie warstw o takiej grubosci i umieszczenie ich w rurze szklanej jest bardzo pracochlonne. Przy predkosciach przeplywu powietrza powyzej 25 cm/s moze w czasie badan nastapic rozrzucenie materialu.When testing sorption materials such as activated carbon and inorganic sorbents, the head it is made in the form of a glass tube in which several layers of carbon are placed, separated from each other steel meshes and secured with steel springs. Layer thicknesses of tested materials in known devices it is about 5 cm. Prepare layers of this thickness and place them in the pipe glass is very labor-intensive. With air flow velocities above 25 cm / s it may over time research is followed by material scattering.

W rurze szklanej trudno jest umiescic filtry wlókniste, które stwarzaja wiekszy opór dynamiczny niz warstwa wegla aktywnego, tojai filtry wlókniste umieszcza sie w oddzielnej glowicy metalowej.It is difficult to fit fiber filters in the glass tube, which create more dynamic resistance than the activated carbon layer, the lining and the fiber filters are placed in a separate metal head.

Istota wynalazku. W urzadzeniu wedlug wynalazku glowica posiada tuleje, w której umieszcza sie jeden lub wiecej metalowych pojemników z materialem sorpcyjnym lub filtrów wlóknistych. Pojemniki wykonane sa w postaci walców, zakonczonych od dolu i od góry siatka metalowa. Siatka jest przylutowana z jednej strony do wyjmowanego pierscienia metalowego, zas pomiedzy pojemnikami a tuleja znajdujee sie gumowy pierscien uszczelniajacy.The essence of the invention. In the device according to the invention, the head has a sleeve in which one is placed or more metal containers with absorbent material or fiber filters. The containers are made in the form of cylinders, with metal mesh at the bottom and top. The mesh is soldered on one side to removable metal ring, and between the containers and the sleeve there is a rubber ring sealing.

Natomiast filtry wlókniste znajduja 4ie od strony wlotu powietrza na sitach i sa oddzielone od siebie oprawkami z gumowymi pierscieniami uszczelniajacymi.2 102 761 Od strony wlotu powietrza tuleja zamknieta jest nasadka dociskowa z reduktorem, przykrecona] do kolnierza srubami, zas od strony wylotu — reduktorem dokreconym do tulei.The fiber filters, on the other hand, are located on the screens on the air inlet side and are separate from each other Toolholders with rubber seals. 2 102 761 From the side of the air inlet, the sleeve is closed with a pressure cap with a reducer, screwed to flange with screws, and on the outlet side - with a reducer screwed to the sleeve.

Stosowanie cienkich warstw o grubosci 0,5 cm i malej objetosci umozliwia badanie zarówno filipów wlóknistych jak i materialów sorpcyjnych oraz pomiar aktywnosci zaadsorbowanego jodku metylu mepda spektrometrii promieniowania gamma w stalej geometrii.The use of thin layers with a thickness of 0.5 cm and a small volume allows the examination of both filips fibrous and sorption materials and measurement of the adsorbed methyl iodide activity mepda fixed geometry gamma spectrometry.

Urzadzenie wedlug wynalazku pozwala badac pakiety filtrów wlóknistych i pakiety zlozone z Mjku warstw materialu sorpcyjnego w duzym zakresie predkosci przeplywu powietrza od 2 do 100 cm/s.The device according to the invention allows testing fiber filter packages and packages consisting of Mjku layers of sorption material in a wide range of air flow velocities from 2 to 100 cm / s.

Objasnienie figur rysunku. Przedmiot wynalazku jest uwidoczniony w przykladzie wykonania na rysu/iku, na którym fig. 1 przedstawia schemat ogólny urzadzenia, zas fig. 2 — przekrój osiowy glowicy.Explanation of the figures of the drawing. The subject of the invention is shown in an example of the embodiment in fig. in which fig. 1 shows a general diagram of the device, and fig. 2 - an axial section of the head.

Przyklad wykonania wynalazku. W zbiorniku 1 znajduje sie mieszanina jodku metylu z powietrzem tod cisnieniem 8 atm. Po otwarciu kranu 2 i regulacji cisnienia na regulatorze 3 mieszanina ta przechodzi przez przeplywomierz 4 i regulator natezenia przeplywu 5, a nastepnie wchodzi do komory mieszania 6, gdzie miesia sie ze strumieniem powietrza oczyszczonym wstepnie z aerozoli na filtrze wlóknistym 7 i tloczonym przez pompe membranowa 8. Do regulacji cisnienia doprowadzanego strumienia powietrza sluzy regulator 9i a natezenie przeplywu wskazuje przeplywomierz 4.Nastepnie mieszanina jodku metylu z powietrzem przechodzi) przez filtr 10, gdzie jest oczyszczana z aerozoli, glowice 11, zawierajaca badane materialy, filtr zabezpieczajacy} 12, po czym jest wydalana do kanalu wentylacyjnego.Example of an embodiment of the invention. In the tank 1 there is a mixture of methyl iodide with air tod pressure of 8 atm. After opening the tap 2 and adjusting the pressure on the regulator 3, this mixture passes through flow meter 4 and flow rate regulator 5 then enter mixing chamber 6 where the meat with a stream of air pre-cleaned of aerosols on a fiber filter 7 and pressed by diaphragm pump 8. The regulator 9i serves to regulate the pressure of the supplied air stream and the flow rate is indicated by the flow meter 4. Then the mixture of methyl iodide with air passes) through filter 10, where it is cleared of aerosols, head 11, containing the test materials, safety filter} 12, after which it is discharged into the ventilation duct.

Glowica 11 sklada sie z reduktora 13, tulei 14 z kolnierzem 15 i gwintowanymi otworami 16 na sruby. Do wnetrza glowicy wprowadza sie czternascie pojemników 17 lub cztery filtry wlókniste i szesc pojemników.The head 11 consists of a reducer 13, a sleeve 14 with a flange 15 and threaded holes 16 for screws. Down inside the head there are fourteen containers 17 or four fiber filters and six containers.

Kazdy z pojemników 17 zamkniety jest od dolu i od góry siatka stalowa 19, przy czym siatka dolna stanowi dno pojemnika, zas siatka górna osadzona jest w pierscieniu mocujacym 20, który zdejmuje sie przy napelnianiu pojemnika. Pomiedzy pojemnikami znajduja sie pierscienie uszczelniajace 18.Each of the containers 17 is closed at the bottom and at the top with a steel mesh 19, the bottom mesh being the bottom the container, while the upper mesh is seated in the fastening ring 20, which is removed when filling container. There are sealing rings 18 between the containers.

Kazdy z filtrów wlóknistych jest ulozony na sicie 21, zas sito — na oprawce 22 z gumowym pierscieniem uszczelniajacym 18. Pierscienie 18 zapewniaja szczelnosc pomiedzy pojemnikami 17 a scianka tulei 14 oraz pomiedzy filtrami wlóknjstymi, dzieki czemu mieszanina jodku metylu z powietrzem przeplywa przez wszystkie warstwy badanych materialów i wszystkie filtry wlókniste. Tuleja 14 zamknieta jest od strony wlotu powietrza nasadka dociskowa z reduktorem 23, przykrecona do kolnierza 15 srubami, przechodzacymi przez otwory gwintowane 16 i 24..Each of the fiber filters is placed on a screen 21, and the screen - on a holder 22 with a rubber ring 18. The rings 18 ensure the tightness between the containers 17 and the wall of the sleeve 14 and between fiber filters, thanks to which the mixture of methyl iodide with air flows through all layers of test materials and all fiber filters. The sleeve 14 is closed on the air inlet side pressure socket with a reducer 23, screwed to the flange with 15 screws passing through the holes threaded 16 and 24 ..

Badano wegiel aktywny firmy Norit CG—I, filtry wlókniste z weglem aktywnym firmy Schleicher-SchU N° 508 impregnowane 10% TEDA, w zakresie predkosci przeplywu od 2 do 100 cm/s. Objetosc badanych materialów 3,5 cm3, co odpowiada objetosci wneki krysztalu NaJ(TI). Stezenie jodku metylu zmienialo sie w granicach 10-7 - 10-5 juCi/cm3." V I 4 $ / [_rA (?) , Powietrze ^X\ Fig-2 1 uylot poMietntaActivated carbon by Norit CG-I, fiber filters with activated carbon by Schleicher-SchU were tested N ° 508 impregnated with 10% TEDA, with a flow rate of 2 to 100 cm / s. The volume of respondents 3.5 cm3 materials, which corresponds to the volume of the NaJ crystal cavity (TI). The concentration of methyl iodide varied between 10-7 - 10-5 µCi / cm3. " V And $ 4 / [_rA (?), Air ^ X \ Fig-2 1 outlet of the container

Claims (1)

1. Zastrzezenie patentowe Urzadzenie do badan dynamicznych sprawnosci filtracji jodku metylu znaczonego jodem promieniotwórczym, zawierajace zbiornik z mieszanina jodku metylu z powietrzem, komore mieszania, uklad zasilania powietrzem, filtr wlóknisty, glowice zbadanymi materialami polaczona z filtrem weglowym za pomoca reduktora, znamienne tym, ze glowica (11) posiada tuleje (14), w której umieszcza sie jeden lub wiecej metalowych pojemników (17) zbadanym materialem sorpcyjnym, wykonanych w postaci walców zakonczonych od góry i od dolu siatka metalowa (19), przy czym siatka z jednej strony przylutowana jest do wyjmowanego pierscienia metalowego (20), zas pomiedzy pojemnikami (17) a tuleja (14) znajduje sie gumowy pierscien uszczelniajacy (18) lub jeden lub wit .ej filtrów wlóknistych, znajdujacych sie od strony wlotu powietrza na sitach (21) i oddzielonych od sieb e oprawkami (22) z gumowymi pierscieniami uszczelniajacymi (18), przy czym od strony wlotu powietrza tuseja (14) zamknieta jest nasadka dociskowa z reduktorem (23), przykrecona do kolnierza (15) srubami, przechodzacymi przez otwory gwintowane (16) i (24), zas od strony wylotu powietrza — reduktorem (13) dokrecanym bezposrednio do tulei (14).102 761 do kanotu wentylacyjnego 3 4 JL i li I =3 10 B /<*1. Patent claim A device for dynamic testing of the filtration efficiency of radioactive iodine labeled methyl iodide, containing a tank with a mixture of methyl iodide with air, a mixing chamber, an air supply system, a fiber filter, heads of tested materials connected to a carbon filter by means of a reducer, characterized by the fact that the head (11) has sleeves (14) in which one or more metal containers (17) are placed with the tested sorption material, made in the form of cylinders ending at the top and a metal mesh (19) at the bottom, with the mesh soldered on one side to the removable metal ring (20), and between the containers (17) and the sleeve (14) there is a rubber sealing ring (18) or one or more fiber filters, located on the air inlet side on the sieves (21) and separated from with grommets (22) with rubber sealing rings (18), with the sleeve (14) closed on the air inlet side there is a pressure cap with a reducer (23), screwed to the flange (15) with screws passing through threaded holes (16) and (24), and from the air outlet side - a reducer (13) screwed directly to the sleeve (14). 102 761 to ventilation duct 3 4 JL i li I = 3 10 B / <*
PL19922877A 1977-06-29 1977-06-29 DEVICE FOR DYNAMIC TESTING THE EFFICIENCY OF METHYL IODIDE FILTRATION BY RADIOACTIVE IODINE THROUGH LIBER FILTERS AND SORPTION MATERIALS PL102761B1 (en)

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Application Number Priority Date Filing Date Title
PL19922877A PL102761B1 (en) 1977-06-29 1977-06-29 DEVICE FOR DYNAMIC TESTING THE EFFICIENCY OF METHYL IODIDE FILTRATION BY RADIOACTIVE IODINE THROUGH LIBER FILTERS AND SORPTION MATERIALS

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PL19922877A PL102761B1 (en) 1977-06-29 1977-06-29 DEVICE FOR DYNAMIC TESTING THE EFFICIENCY OF METHYL IODIDE FILTRATION BY RADIOACTIVE IODINE THROUGH LIBER FILTERS AND SORPTION MATERIALS

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PL102761B1 true PL102761B1 (en) 1979-04-30

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