JPS58189023A - Apparatus for extracting water - Google Patents

Abstract

PURPOSE:To reduce cost and to reduce the installation space of machinery, by providing a freezer unit with respect to a multiple system equipped with plural gas sampling systems in common. CONSTITUTION:When a system is doubled, a common sampling pump 12 and a first water extracting part 13 are provided to a sampling pipe 11 and divided into two systems for the first time at the outlet side thereof while the second water extracting parts 141, 142 and valves 151, 152 are respectively provided in series to the divided pipes which are connected again at outlet sides thereof to a common flowmeter 17. The common connecting point of the first extracting parts 13 and the second extracting parts 141, 142 are communicated with a drain pipe 18, a drain valve 19 and a drain tank 20 through valves 161, 162. In a freezing cycle, a common freezer unit 25 is provided and a cooling medium sent from the freezer unit 25 is branched into two branch circuits through a cooling medium pipe 24 while valves 291, 292 and prepositional evaporators 261, 262 are respectively provided to the branch circuits and the cooling medium is returned to the freezer unit 25 from a post-positional evaporator 27 provided to the outlet sides thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a moisture extraction device that extracts moisture from gas using a refrigeration cycle.

The device of the present invention is used, for example, in the field of nuclear energy (.) as a gas sampling system for tritium monitoring.

[Technical Background of the Invention] An apparatus for extracting moisture from gas using a refrigeration cycle has already been proposed. In order to operate this device continuously, for example when applied to a tritium monitor in a nuclear facility, it is necessary to multiplex the system. FIG. 7 shows a conventional example of such a multiplexed water extraction device.

The apparatus shown in FIG. 7 exemplifies the case where two systems, system / and system C, are provided. System / and system - are mutually independent and have exactly the same configuration, and one system is always operated without interruption. Each system 1 and 1 has a gas sampling system and a refrigeration cycle. The gas sampling system consists of sampling piping/
A sampling pump installed in /, a first moisture extraction section 13, a first moisture extraction section /da, an on-off valve /j, /
4 and a gas flow meter/7. Drain piping 15 branches from the connection part of both moisture extraction parts /J and /17,
Its free end is led to the drain tank via the drain valve/de. When the water level in the drain tank reaches a predetermined level of 111ζ or higher, the drain pipe n and the drain valve n are closed. The refrigeration cycle consists of a refrigerator unit, a front evaporator tum, and a rear evaporator core, which form a closed circuit via a refrigerant distribution W21I.The refrigerator unit 1 is a compressor, It consists of a capacitor and a capillary tube. The pre-evaporator roller is spatially located close to the first water extraction part, and the bond-evaporator-7 is spatially located close to the first water extraction part.
/J is located closely. The first water extraction unit S is additionally provided with a heater d as heating means.

In both systems /, -, the gas sampled by the sampling pump /, 2 first passes through the first water extraction section 1.
3. In the process of passing through the water, it is primarily cooled, and most of the moisture, for example? 0- degree is extracted. The water extracted here is temporarily stored in the drain pipe -fi/z. The sampling gas is further cooled while passing through the first water extraction section, where it is almost completely dehydrated. The dehydrated dry gas passes through valve H, /4 and kit meter /7 and is supplied to the gas monitor, etc. (not shown). It is stored in the drain tank via the drain valve IT.If ice forms on the inner wall of the pipe in the water extraction device, it will prevent the passage of gas, so it is melted by the heater
K leads.

[Problems with background technology]

Although the device shown in Figure 1 is effective for continuous gas sampling, it requires multiple systems with identical configurations and is self-contained, which increases the installation space and reduces the direct cost of the equipment. The disadvantage is that the installation space increases the cost.

[Purpose of the invention]

The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a water extraction device that requires as little installation space and cost as possible.

[Summary of the invention]

To achieve this objective, the present invention consists of a refrigeration cycle and a gas sampling system, and the refrigeration cycle includes a plurality of pre-evaporators, an on-off valve provided in series for each pre-evaporator, and a plurality of 1Stllll evaporators. The gas sampling system consists of a post-evaporator installed in common at the outlet of the evaporator, and a common refrigerator unit including a compressor and a condenser installed between the post-install evaporator and multiple pre-evaporators. , a sampling pump that tempers the gas from which water is to be extracted, a water extraction section of the TSL provided so that the gas sampled by the sampling pump is subjected to the action of the apparatus evaporator, and a water extraction section provided for each pre-evaporator, a first moisture extraction section into which the gas passing through the first moisture extraction section is subjected to the action of the pre-evaporator; an on-off valve provided in series with each of the first moisture extraction sections; The moisture extracting device is constructed by including a drain draining means provided in common to the first moisture extracting section.

Embodiment of the Invention FIG. 1 shows an embodiment of the present invention, which will be described in detail below. This device exemplifies a case where the system is duplicated as in the case of FIG. 1. Here, the sampling pipe // is provided with a common 97 Pringbon Pluco and a common first water extraction part i3, and is divided into one system only at the outlet side thereof, and the first water extraction part #/ is divided into a single system for the first time.

/ An octopus is provided. Each moisture extraction section has a valve/! /, /! r are provided in series,
At the outlet side, they are merged again and connected to a common flow meter 77. The common connection point of the seventh moisture extraction section 13 and the first moisture extraction section /DA/, /DA communicates with the drain pipe 1 and the drain valve /L via valves /4/, /A, and further Guided to the drain tank.

On the other hand, the refrigeration cycle is provided with a common refrigerator unit. This refrigerator unit is assumed to include a compressor, a condenser, an expansion valve, and a throttle. The refrigerant sent out from the refrigerator unit) is branched into two branch circuits via the refrigerant piping Koda, and one of the branch circuits is equipped with a valve 91 and a pre-evaporator 67.
Further, the other branch circuit is provided with a valve knob λ and six pre-evaporator knobs. The outlet sides of both branch circuits are connected via a common post-evaporator core to the compressor of the refrigerator unit. Prefix Evabo Tako 4/, 2
The 4 units are placed closely in the first water extraction section /da/, /pass in each system, and the downstream evaporator 7
is closely placed in the water extraction section 13 of the WJ/.

A heater II and a heater λ are provided in the first water extraction parts /X/ and /X, respectively.

The functions of each part of this device are similar to those of the device shown in FIG. 1 already described.

% mold of this device is that the first moisture extraction section /J and the first evaporator core are provided in common for both systems, the first moisture extraction section /II/, /44 and the pre-evaporator λA/,
4 and 2 were multiplexed (duplicated), and in addition, the sampling pump 1 and the refrigerator unit, and the drain pipe/1. The reason is that the drain valve/de and drain tank are provided in common for both systems.

The first water extraction section /+1/, / is operated alternately by time control, and it is operated by valves is/, isco and valve 2.
This is done by opening and closing 9/, 29-. Each system is repeatedly operated in sampling, heating, collection, and precooling modes as shown in FIG. Sampling here is a mode in which the sampling gas is cooled at a predetermined temperature for a predetermined period of time to extract moisture from the gas and turn it into ice or frost. At this time, each section mentioned above is opened. Heating is a mode in which ice and/or frost formed by freezing or frosting is heated (by heaters El and Colco) to turn it into water. Collection is a mode in which valve /4/ or /4 is opened and the water is collected up to the drain valve /de. Furthermore, precooling is a mode in which each system is cooled in advance before sampling mode in order to operate each system as efficiently as possible during long-term operation. ! / will be opened. Both systems can be operated in such a mode.

The embodiment shown in FIG. 3 is based on the embodiment shown in FIG.
The circulating refrigerant is heated by three heaters. If the refrigerant coming out of the elf evaporator 4/, 4- is still at a low temperature of 0°C or lower and enters the post-evaporator 7, the sampling gas passing through the water extraction section 13 will freeze and block the piping. There is a risk of it getting lost. However, according to the configuration shown in FIG. 3, it is possible to prevent the piping from clogging due to such freezing. Note that if the refrigerant returns from the evaporator to the Reikaniso unit H in a liquid phase, the life of the unit will be significantly shortened. Even in such a situation, the refrigerant heating section 3/ works well as a preventive measure. .

The Isj diagram shows an embodiment in which expansion valves and throttles of the refrigeration cycle are provided for each system. That is, here, based on the device shown in Fig. q, the expansion valves 9/, 29- are attached to the beak, and the expansion valves 4I/, Reco and diaphragm (Ill, l/) are attached.
- is provided. According to this configuration, pressure interference between systems can be reduced when multiple systems are used. Depending on the case, the apertures '11/1712 may be placed on the exit side of the pre-evaporator rollers/4.

〔Effect of the invention〕

According to the present invention, by providing many components such as refrigerator units in common for multiple systems, it is possible to reduce the cost of the equipment itself, and also to reduce the equipment installation space. Additionally, cost reduction can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a piping system diagram of a conventional water extraction device, and FIGS. 1, 3, 3, and 5 are piping system diagrams of different embodiments of the present invention, respectively. //... sampling pipe, /ko... sampling pipe, 13... first moisture extraction section, /411. / Octopus...the first water extraction part, /! /, /12. /!
/, /Ako... valve, /7... flow i-needle, /l.
・Drain piping, /l... Drain valve, N... Billet/tank, J... Refrigerant piping, j... Freezer unit, 2
1, /, Muko... Pre-evaporator 1.27... Post-evaporator, 211. uj, 2...Heater, 3/Medium refrigerant heating section, 3--Heater. Applicant's agent Kiyoshi Inomata Fl [I] Figure 2 Figure 3

Claims (1)

[Claims] /) The refrigeration cycle consists of a refrigeration cycle and a gas sampling system, and the refrigeration cycle includes a plurality of pre-evaporators, an on-off valve provided in series for each pre-evaporator, and an outlet of the plural pre-evaporators. The gas sampling system consists of a post-evaporator that is commonly installed on the side, and a common refrigerator unit that includes a compressor and a condenser that is installed between this post-evaporator and multiple pre-evaporators. a first moisture extraction section provided for each pre-evaporator, and a first moisture extraction section provided for each pre-evaporator so that the gas sampled by the sampling pump is subjected to the action of the post-evaporator; a first moisture extraction section into which the gas passing through the first moisture extraction section flows and is subjected to the action of the pre-evaporator; an on-off valve provided in series with each of the first moisture extraction sections; A moisture extraction device having a unique feature, including a drain removal means provided in common with the first moisture extraction section. 2) The first moisture extraction section each includes a heater. 3) A % pestle as claimed in claim 1, characterized in that a heating section for heating a refrigerant is disposed at the inlet of the post-evaporator. Moisture extraction device according to item 1 or 2.