JPS5912337A - Filter testing device - Google Patents

Abstract

PURPOSE:To make it possible to perform the performance test of a filter, which is used at the temperature lower than a normal temperature, by providing a first cooling mechanism, which cools incoming air to the temperature lower than the normal temperature, and a second cooling mechanism, which cools the inside of a constant temperature both to the temperature lower than the normal temperature. CONSTITUTION:A filter 102 under test is enclosed in a constant temperature bath 2. A radioactive material is mixed into air flowing into the filter 102 by a mixing mechanism 22. The incoming air is made to be the state, in which temperature is higher than a normal temperature and vapor is saturated, by an air mechanism 14. A first cooling mechanism 104 is provided in a heat exchanger 18, and cools the air flowing into the filter 102 to the temperature lower than the normal temperature. A second cooling mechanism 122 is provided in the bath 2, and cools the inside of the bath 2 to the temperature lower than the normal temperature. Therefore, the operating state of the filter 102, which is used in the state whose temperature is lower than the normal temperature, can be reproduced, and the performance of the low temperature filter 102 can be tested.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a filter testing device that reproduces the usage state of a filter and tests a filter in the usage state of the filter.

[Technical background of the invention and intermediate points]

For example, a non-shore gas treatment system (hereinafter referred to as 5
It is called GTS. ) uses a filter to purify the air exhausted from the reactor containment vessel. This filter purifies air that is at a pot temperature rather than room temperature and is saturated with steam, so it is necessary to test it by reproducing the conditions in which it is used.

Therefore, a conventional filter testing device as shown in FIG. 1 has been used. In the figure, reference numeral 2 denotes a constant temperature bath, and the constant temperature bath 2 is configured to accommodate the filter 4 to be tested in a sealed internal space. Further, an electric heater 6 for heating the inside of the constant temperature bath 2 is provided, and this heater 6 is configured to receive power from an external power source 8.

There is an inflow side pipe 10 on the air inflow side of the filter 4.
is connected to the thermostatic chamber 2, and is configured to supply electricity from outside the thermostatic chamber 2. The inlet pipe 10 includes a filter 12° humidifier 14 from the upstream side. Piping heater 16.
The 18° extension pipes 20 of the heat exchanger are connected in sequence, and each of these devices forms a control mechanism. This seedling sub-mechanism is configured to condition the ψ air flowing into the filter 4 under the usage conditions of the filter 4, that is, in a state where the temperature is about 70° C. and the steam is saturated.

A mixing mechanism 22 is branched and connected to the downstream side of the extension pipe 20. This mixing mechanism 22 mixes inflow air pressure radioactive material. The mixing mechanism 22 contains a radioisotope as a radioactive substance.
:Hereinafter referred to as RI. ), and a RISa generator 26 that receives the supply of RI from the cylinder 24 and mixes the RI into the inlet pipe 10.

An outflow side pipe 30 is connected to the outflow side of the filter 4, and is configured to discharge air to the outside via the filter 32. A filter 32 is also connected to a discharge pipe 34 of the RI generating cherry 26 described separately.

With the conventional test equipment configured in this way, 5GTS
The filter 4 is used to filter out radioactive substances while the filter 4 is in use, and the performance of the filter 4 is tested by inspecting the filter 4 after filtration.

However, recently, as mentioned in MiJ, not only filters 4 used at temperatures higher than room temperature are tested, but also filters used at temperatures lower than room temperature, such as the central control room'q adjustment system filter. A need has arisen. For this reason, with conventional filters, it was not possible to reproduce the usage conditions at temperatures lower than room temperature, and it was not possible to test low-temperature filters.

[Purpose of the invention]

An object of the present invention is to provide a filter testing device that can test the performance of not only filters used at temperatures higher than room temperature, but also filters used at temperatures lower than room temperature.

[Summary of the invention]

The filter testing device according to the present invention can test the filter under test at a constant rate. A filter testing device that is housed in M cypress and includes a mixing mechanism that mixes radioactive substances into the air that flows into the filter, and an air conditioning mechanism that makes the incoming air saturated with steam at a temperature higher than room temperature. It is equipped with a first cooling mechanism that cools the incoming air to a temperature lower than '74i;IA, and a second cooling mechanism that cools the inside of the thermostatic chamber to a temperature lower than room temperature. It is also possible to test the performance of low-temperature filters by reproducing the conditions in which the filters are used.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 2 and 3. In addition, in the drawings, the same reference numerals are given to the same parts as those in the prior art.

In the figure, 2 is a constant temperature bath, and the filter to be tested 102 is accommodated in the constant temperature bath 2. This filter under test 1
02 is not only used in conditions higher than room temperature (about 70 degrees Celsius), such as the 5GTS filter, but also
Lower temperature than room temperature (0℃~5℃) like centrally controlled silkworm ventilation system
It also includes those used in

An inflow side pipe 10 is connected to the inflow side of the filter 102 . A filter 1 is connected to this inflow side pipe 10 from the upstream side.
2. Humidifier 14. Piping heater 16. Heat exchanger 18. Extension pipes 20 are connected in sequence, and these devices constitute an air conditioning mechanism. The filter 12 collects fine dust in the incoming air. The humidifier 14 humidifies incoming air. The pipe heater 16 is wrapped around the inflow pipe 10 and heats the humidified ψ air to about 90°C. The heat exchanger 18 exchanges heat between heated high-humidity air and a heat medium to bring the air to a state of pressure saturated with steam. The extension tube 20 allows air to flow through the thermostatic oven 2 for a predetermined period of time, so that the temperature of the air is the same as that inside the thermostatic oven 2.

The heat converter 48 is provided with a first cooling mechanism 104 that cools the incoming air to below room temperature. This first
? As shown in FIG. 3, the cooling mechanism 104 is connected by bypassing the heat medium circulation pipe 106 of the heat exchanger 18.

The first cooling mechanism 1θ4 includes a U-shaped tube 108. Cooling pipe 110. It is composed of a cooler 112. The U-shaped tube 108 is configured to circulate a heat medium, and the U-shaped tube 108
A cooling pipe 110 is pushed inside. A refrigerant cooled to a low temperature by a cooler 112 flows through the cooling pipe 1 and is configured to cool the heat medium of the mrJ heat exchanger 18.

Furthermore, a cooling pipe 120 is arranged within the constant temperature bath 2. This cooling pipe 120 is cooling 1! The refrigerant cooled by l12t is circulated, and the inside of the thermostatic oven 2 is cooled by exchanging heat between this refrigerant and the air inside the thermostatic oven 2. These cooling pipes 120° cooler 122 form a second cooling mechanism.

In addition, 124... in the figure is an on-off valve.

The device configured as described above has the following effects.

First, since the heat exchanger 18 is provided with the first cooling mechanism 104, the electricity flowing into the filter 102 can be cooled to a temperature lower than normal temperature, for example, about 0°C to 5°C. Since the 1u temperature bath 2 is also provided with the second cooling mechanism, the temperature inside the constant temperature bath 2 can be lower than room temperature. Therefore, the usage condition of the filter 1020 used at a temperature lower than room temperature can be reproduced, and the performance of the filter 102 for low temperature can be tested.

In addition, since the adjustment mechanism is provided with a pipe heater 16 and a first cooling mechanism 104, and the constant temperature room 2 is provided with an electric heater 6 and a second cooling mechanism, the filter 102 is not used. The temperature axis part when reproducing the state can be performed quickly and accurately.

Note that the present invention is not limited to the above embodiment. For example, the first cooling mechanism is not limited to one provided in the heat exchanger 18, and may be any mechanism as long as it cools the inflowing seedling air to a temperature lower than room temperature.

Further, the second cooling mechanism does not necessarily connect the cooling pipe 120 to the constant temperature bath 2.
There is no need to place it inside the IJ! It may be made to flow into a constant temperature bath.

〔Effect of the invention〕

According to the present invention, it is possible to test the performance of not only filters used at temperatures higher than room temperature, but also filters used at temperatures lower than room temperature by reproducing the usage conditions. The effect is great.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional filter testing device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a block diagram showing the first cooling mechanism in FIG. 2... Constant temperature chamber, 102... Filter to be tested, 22.
... Mixing mechanism, 12... Filter ('2ml+1 mechanism). 14... Humidifier (air conditioning mechanism), 16... Piping heater (air conditioning mechanism), 18... Heat exchanger (air conditioning mechanism), 20
... Teisho tube (air conditioning mechanism), 104... First cooling mechanism, 108... U-shaped tube, 110... Cooling pipe, 112...
...Cooler, 120...Cooling pipe (second cooling mechanism). 122... Cooler (second cooling mechanism). Applicant's agent Patent attorney Suzu Ushiki Hiko-1 (

Claims (1)

[Claims] a mixing mechanism for housing a filter to be tested in a constant temperature bath and mixing radioactive substances into the air flowing into the filter;
iJ A filter test device comprising an air conditioning mechanism that brings the incoming air into a state where it is saturated with steam at a pot temperature lower than room temperature, a first cooling @ side that cools the inflowing air to a lower temperature than room temperature;
A filter testing device comprising: a second cooling mechanism that cools the inside of the constant temperature bath to a temperature lower than room temperature.