JPS6331038Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a processing device that removes components contained in tritium-containing gas or deuterium gas produced in nuclear fusion, etc., and releases them as harmless gas.

(Prior art) JP-A-48-17100 and JP-A-51-39398 disclose that tritium is recovered by an exchange reaction by contacting water or steam with a gas containing tritium.
Disclosed by the publication No.

(Problems to be solved by the invention) The above-mentioned conventional method aims to bring a tritium-containing gas into contact with water or water vapor to cause an exchange reaction. A pseudocondensable gas is used, and the latter uses an anhydrous powder of a hydrate, and it is inevitable that each exchange reaction treatment requires detailed treatment steps.

(Means for solving the problem) The present invention avoids conventional exchange reaction means, humidifies the processing gas as a pretreatment, dissolves tritium or deuterium components in the gas with water, and The water is cooled and dehumidified to become a harmless gas and then released. Components dissolved in the water are led to a storage tank and removed along with the water through the tank, and some of the water that has passed through the storage tank is recycled for humidification. It provides equipment designed for use.
A processing cylinder with a processing gas inlet at one end and an outlet at the other end is provided with a pre-processing heating section, a humidifying section using a fountain, and a dehumidifying section using cooling, and a water tank formed on the lower surface of the processing cylinder. is connected to the storage tank through a communication pipe, and the storage tank is provided with several upper and lower perforated plates inside the tank, on the upstream side thereof, the lower part is connected to the communication pipe, and the introduced treated water overflows into the tank from the upper part. On the downstream side, treated water is introduced from the upper part and drained from the lower part, and a discharge chamber with several upper and lower perforated plates installed inside is divided. , a plurality of partition plates are arranged vertically in parallel with the tank bottom plate at parallel intervals, and the lower part of the discharge chamber is connected to the fountain pipe in the processing cylinder by a conduit via a suction pump. , a discharge port is provided at one end of the bottom of the storage tank.

(Function) As shown in the illustrated embodiment, in this device, when a gas containing, for example, tritium is introduced into the processing cylinder 1 from the inlet 2, the processing gas is first heated appropriately by the heating section 4 and then heated. By contacting and humidifying the spray from the fountain pipe 5, the spray turns into water vapor through contact with the processing gas that has been moderately heated by the heating, and the components contained in the processing gas dissolve into the water vapor or water droplets and flow into the lower water tank 7. Furthermore, since the processing gas is processed in the dehumidification section 6 at a lower temperature than the heating section 4, the moisture in the gas is condensed and separated by cooling due to the temperature difference, and the moisture is stored in the water tank 7 and then processed in the dehumidification section 6. The dehumidified and dried gas in step 6 reaches the outlet 3, is further heated in a reheating section 14, undergoes a drying process, and is discharged as a harmless gas.

The liquid in the water tank 7 with the dissolved components flows through the connecting pipe 8 into the supply chamber 17 of the storage tank 9, overflowing and filling the tank 17. Thereafter, the liquid is rectified by the perforated plate 17a of the supply chamber 17, overflowing from the top of the supply chamber 17 and gradually flows toward the discharge chamber 18 on the other side. During this time, the tritium water with dissolved tritium has a tendency to gradually settle due to the slight difference in specific gravity with the water. Also, the water in the tank 9 is drained from the lower discharge port 20 by the partition plate 19 provided in parallel.
A downward flow occurs in the interval, and the heavy water with dissolved tritium gradually sinks and flows out of the discharge port 20 at the lower surface interval of the partition plate 19, while the light water mixed with some dissolved water in the upper layer of the tank gradually flows toward the discharge chamber 18 and enters the upper part of the chamber 18, and is circulated to the spray pipe 5 by the pump 10.
The water containing tritium and the like flowing out from the outlet 20 is sent to a post-treatment tank where the tritium and the like are separated.

Note that a portion of the treated water in the tank 9 is discharged and mixed with water containing dissolved components and circulated through the fountain pipe 5.
Since water is replenished into the circulation path in an amount corresponding to the amount of water discharged from the pump, the humidifying effect of the circulating water on the process gas is not affected, and the absolute amount of water does not change.

In this way, the processing gas passes through the processing cylinder 1 to dissolve and remove components such as tritium in the injection water and release it as a harmless gas, and the water containing dissolved tritium passes through the storage tank 9 and is again used as injection water. While circulating, part of the dissolved water in the storage tank 9 was discharged to the outside of the tank to separate dissolved components.

(Example) Embodiments of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a processing cylinder installed horizontally, with the front part serving as a processing gas inlet 2 and the rear part serving as an outlet 3 through which the processing gas passes. A processing heating section 4, a humidifying section with a fountain pipe 5, and a dehumidifying section 6 are sequentially provided, a water tank 7 is formed on the lower surface of the processing cylinder 1, the inside of the water tank 7 is communicated with a storage tank 9 through a communication pipe 8, and further Pump 10 inside the storage tank 9
The fountain pipe 5 was electrically connected to the water fountain pipe 5 through a conduit 11 equipped with the following.

In the illustrated example, the heating section 4 and the dehumidification section 6 are constructed of heating coils, and the heating medium from the compressor 12 is circulated therethrough, and an eliminator 13 and a reheating section 14 are provided at the rear of the dehumidification section 6. The moisture in the processing gas that has passed through the dehumidifying section 6 is further dehumidified and dissipated, and a heat medium is also circulated in the reheating section 14, which is installed inside the cylinder 1. The operation is controlled by an electric three-way valve 16 which is opened and closed by a temperature sensor 15. That is, in the illustrated example, when the electromagnetic valve 16 is opened, the heat medium flows as shown by the arrow to operate the heating section 4, dehumidifying section 6, and reheating section 14, but when the temperature sensor 15 detects the heating medium, the electric three-way The heating section 4 can also be stopped by closing the valve 16. The storage tank 9 has one side formed into a compartment supply chamber 17 connected to the communication pipe 8, and the interior is equipped with several stages of perforated plates 1.
7a, and the other side is similarly divided into several stages by a perforated plate 18a, forming a discharge chamber 18, which is communicated with the suction side of the pump 10 in the conduit 11, and is placed in the storage tank 9 with a gap from the bottom plate. A plurality of partition plates 19 are provided vertically at parallel intervals, and a discharge port 20 is provided on one side of the bottom of the structure and connected to a post-treatment tank (not shown).

Note that the height of the upper edge of the partition plate 19 is adjusted assuming that on the downstream side of the treated water in the tank 9, as the dissolved water such as tritium gradually settles, the level of the dissolved water will become a downward sloping line toward the downstream side. The height of the treated water is gradually lowered along the downwardly inclined line, so that the light water layer in the upper layer of the treated water can smoothly flow toward the supply chamber 18 side, eliminating problems such as the flow of the light water layer in the upper layer of the treated water being blocked by the partition plate 19 and creating eddy currents. I made it.

(Effect of the invention) According to the invention, the gas containing tritium and deuterium is humidified, and then the gas containing tritium and deuterium is cooled and dehumidified to dissolve the water and separate the contained components from the gas. It can be easily released as a harmless gas, and it is economical because the water with dissolved components through the above treatment is once introduced into the storage tank and then circulated back into the gas processing cylinder for humidification. In the storage tank containing dissolved water, the dissolved water flows from the supply chamber side to the discharge chamber side, while the water in the tank flows out from the discharge port provided at the bottom of the storage tank toward the aftertreatment section. A small amount of treated water is supplied to the upper part of the tank by a downward laminar flow within the vertical distance between the partition plates installed at the lower part of the tank, but due to the difference in specific gravity between the water and dissolved water such as tritium. Due to the tendency of dissolved water to settle and the downward laminar flow effect, some of the dissolved water is always discharged outside the tank, and the light water in the upper layer mixed with some of the dissolved water is used again for humidification. Since it circulates in the storage tank and a part of it is always removed outside the tank, the amount of dissolved tritium etc. gradually increases.The humidification process of the gas in the processing cylinder is also possible due to the repeated circulation action without remaining. It has the effect of not causing any problems.

[Brief explanation of the drawing]

The drawing is a cross-sectional view diagrammatically showing the device of the invention. 1... Processing tube, 2... Inlet, 3... Outlet,
4... Heating section, 5... Humidifying section, 6... Dehumidifying section, 7
...Water tank, 8...Communication pipe, 9...Storage tank, 10...
... Suction pump, 11 ... Conduit, 17 ... Supply chamber,
18... Discharge chamber, 17a, 18a... Perforated plate, 1
9... Partition plate, 20... Outlet.

Claims (1)

[Scope of utility model registration request] A processing cylinder with a processing gas inlet at one end and an outlet at the other end is provided with a pre-processing heating section, a humidifying section using a fountain, and a dehumidifying section using cooling, and a water tank formed on the lower surface of the processing cylinder. is connected to the storage tank through a communication pipe, and the storage tank is provided with several upper and lower perforated plates inside the tank on the upstream side thereof, and the lower part is connected to the communication pipe so that the introduced treated water overflows into the tank from the upper part. On the downstream side, treated water is introduced from the upper part and drained from the lower part, and a discharge chamber with several upper and lower perforated plates installed inside is divided. , a plurality of partition plates are arranged vertically in parallel with each other at parallel intervals to the bottom plate of the tank, and the lower part of the discharge chamber is connected to the fountain pipe in the processing cylinder through a suction pump and a conduit. , a processing device for gas containing tritium and deuterium, comprising an outlet at one end of the bottom of a storage tank.