JPH11520A - Moisture discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a trap device for storing moisture separated from a sample and its peripheral structure and also to simplify the structure. SOLUTION: This moisture discharge device sucks the sample in which gas and the moisture coexist, and the sample is passed through plural stages of moisture separation means connected in series to discharge the moisture separated the gas. Discharge pipes 42, 43 respectively provided on a gas liquid separator 12 as a moisture separation means and on a dehumidifier 16, are connected to the trap device 46, and also the mutual insides of these discharge pipes 42, 43 are kept in a water sealing state via the trap device 46. Also, the moisture discharged from the discharge pipes 42, 43 to the trap device 46 and stored is forcedly sucked with a pump 47 and discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water discharging device used for an analyzer of exhaust gas containing water, for example.

[0002]

2. Description of the Related Art FIG.
1 shows a first conventional technique of a condensed water discharge device used for pretreatment for analysis of exhaust gas containing water. In the figure, reference numeral 50 denotes a flue of a waste incinerator. Exhaust gas passing through the flue 50 is passed through a heating conduit 11 to the gas-liquid separator 1.
2 Here, since the flue gas in the flue 50 generally contains a large amount of moisture, the dehumidification is performed in two stages by the gas-liquid separator 12 and the dehumidifier 16 of an electronic cooling type connected in series to the subsequent stage. It has become. 22 is a gas supply pipe from the gas-liquid separator 12 to the dehumidifier 16;
The gas supply pipe 23 coming out of the dehumidifier 16 at the subsequent stage is connected to a pump 20.
And sent to the gas analyzer 21 via the gas supply pipe 24. Reference numeral 25 denotes a discharge pipe from which gas after analysis is discharged.

On the other hand, 13 is a discharge pipe for discharging condensed water removed from the exhaust gas by the gas-liquid separator 12, 14 is a trap device, and 15 is a discharge pipe for drain discharge.
7 is a discharge pipe for discharging the condensed water further removed by the dehumidifier 16, 18 is a trap device, and 19 is a discharge pipe for discharging drain.

In the prior art shown in FIG. 5, since the discharge pipes 13 and 17 are water-sealed by condensed water in the trap devices 14 and 18 in a steady state, the water seal of the exhaust gas sucked by the pump 20 is maintained. become.

According to this prior art, the negative pressure in the gas-liquid separator 12 and the dehumidifier 16 due to the suction of the pump 20 causes
In the discharge pipes 13 and 17, the balance is achieved in a state where the liquid level of the condensed water has risen to some extent. However, in consideration of the height h1 of the liquid level, unless the height h2 in FIG. If the height h3 is not sufficiently long, the water seal will be broken. Therefore, there is a problem that the entire device becomes larger in the height direction of the trap devices 14 and 18. Further, the discharge pipes 13 and 17 have an inner diameter (1) large enough to allow condensed water to flow down as water droplets.
(Approximately 0 mm), which also causes the device to become large.

A second prior art shown in FIG. 6 has been known in view of these drawbacks. That is, in FIG. 6, reference numeral 30 denotes a normally open valve provided in the discharge pipe 28 of the gas-liquid separator 12, 31 denotes a normally open valve provided in the discharge pipe 29 of the dehumidifier 16, 32 denotes a trap device, and 32a denotes a trap. A partition in the device 32, 33 is a normally closed valve for opening to the atmosphere, 34 is a discharge pipe for drain discharge, and 35 is a normally closed valve. In this conventional technique, the moisture in the exhaust gas removed by the gas-liquid separator 12 and the dehumidifier 16 is discharged from the exhaust pipes 28 and 29 to the trap device 32.
Accumulate inside. At this time, the normally closed valves 33 and 35 are in a closed state. Thereafter, when the normally closed valves 33 and 35 are opened and the normally opened valves 30 and 31 are closed, the inside of the trap device 32 is opened to the atmosphere, and the condensed water is discharged until the water level coincides with the upper end of the discharge pipe 34. Discharged via tube 34. In addition,
The lower end of the partition 32a is located at a position lower than the upper end of the discharge pipe 34, whereby the water seal of the discharge pipes 28 and 29 is maintained.

According to this configuration, if the capacity of the trap device 32 is made sufficiently large, the condensed water does not reach the inside of the discharge pipes 28 and 29, so that it is possible to prevent the device from being enlarged in the height direction. However, the configuration is complicated by the normally open valves 30, 31 and the normally closed valves 33, 35, which are generally constituted by solenoid valves, and their control circuits, and a new problem that the manufacturing cost is increased arises.

FIG. 7 shows a third prior art, in which 36 is a discharge pipe of the gas-liquid separator 12, and 37 is a dehumidifier 16
Reference numeral 38 denotes a trap device, 38a denotes a partition wall, 39 denotes an open-to-atmosphere tube, 40 denotes a drain discharge tube, and 41 denotes a discharge tube connecting upper and lower chambers of the trap device 38. In this configuration, the water removed by the gas-liquid separator 12 and the water removed by the dehumidifier 16 are collected in a chamber below the trap device 38 and discharged from the discharge pipe 40. According to this conventional technique, the liquid surface height h1 in the open-to-atmosphere pipe 39 is maintained in a state where the pressure on the dehumidifier 16 side and the atmospheric pressure are balanced.
Becomes longer, the height h2 must be made sufficiently long. As a result, there is a problem that the trap device 38 becomes large in the height direction.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a water discharging apparatus which has a simple structure and can be reduced in size.

[0010]

According to a first aspect of the present invention, there is provided an apparatus for discharging moisture provided in a plurality of moisture separating means to which a sample in which gas and moisture are mixed is supplied by suction. While connecting the tube to the trap device,
The inside of these discharge pipes is kept in a water-sealed state via a trap device, and the water removed by each water separating means and discharged from each discharge pipe to the trap device, and the stored water is forced by a pump. It is intended to suck and discharge. In the present invention, "water" includes gaseous water in addition to liquid water, and "water separation means" separates liquid water from gas by gas-liquid separation (degassing). Means for liquefying water present in a gaseous state by cooling or the like and separating it from the gas. Further, in the present specification, “gas” means a gaseous component other than water.

According to the present invention, since the water in the trap device does not reach the water separating means from the discharge pipe, there is no problem even if the discharge pipe is shortened, and the entire apparatus can be downsized. . Further, since the plurality of discharge pipes are sealed with water, it is possible to prevent the gas containing water from flowing to the subsequent water separation means via these discharge pipes. In the present invention, since the water in the trap device is sucked by the pump, the diameter of the discharge pipe from the water separation device to the trap device can be reduced, and the water separation device is not shut off from the atmosphere by a water seal. However, the air does not flow into the water separation means.

[0012] The water discharging device of the present invention can be used, for example, as a pretreatment device of a gas analyzer. In this case, the sample supplied to the water separating means is as described in claim 2. There is an exhaust gas generated by incineration of wastes. Further, when the water exhausting device of the present invention is used in a wet gas analyzer for analyzing a state in which a gas is absorbed in an absorbing solution, a liquid sample in which the gas is absorbed in the absorbing solution is used as described in claim 3. After the analysis, it is supplied to the water separating means.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a first embodiment of the present invention. The same components as those in FIGS. 5 to 7 are denoted by the same reference numerals. In FIG. 1, reference numeral 46 denotes a water-sealed trap device, and a discharge pipe 42 of the gas-liquid separator 12 is connected near the lower end of the trap device 46. The dehumidifier 1 is provided at the upper end of the trap device 46.
Six discharge pipes 43 are connected. Here, the gas-liquid separator 12 and the dehumidifier 16 constitute a water separating means in the present invention. Further, reference numeral 44 denotes a discharge pipe which is opened at a substantially middle height in the trap device 46, and is a pump 20.
Is connected to a pump 47 having a relatively small capacity. 4
Reference numeral 5 denotes a discharge pipe connected to the pump 47.

Here, the trap device 46 has a capacity capable of storing a certain amount of condensed water W in the inside thereof, and the upper end opening of the discharge pipe 44 is formed by the opening of the discharge pipe 42 of the gas-liquid separator 12. It is necessary to be located above the part. Also, if the opening of the discharge pipe 44 is too close to the upper end of the trap device 46, if the water separated by the gas-liquid separator 12 and the dehumidifier 16 increases rapidly, the discharge pipe 43 extends from the discharge pipe 43 to the dehumidifier 16. Since the condensed water reaches and it becomes difficult to dehumidify the exhaust gas, it is desirable to have a space having an appropriate capacity as shown in the drawing. Pump 47
Is provided for the purpose of forcibly sucking and discharging the condensed water W in the trap device 46.
Also, a small amount of gas is sucked and discharged through the dehumidifier 16.

In this embodiment, the trap device 4
The water seal of the discharge pipes 42 and 43 is maintained in a state where the condensed water is accumulated in the inside 6. Accordingly, the gas containing water in the discharge pipe 42 does not flow to the dehumidifier 16 via the trap device 46 and the discharge pipe 43. The trap device 46
Since the condensed water inside is always forcibly sucked and removed by the pump 47, even if the length of the discharge pipe 43 is shortened, the negative pressure on the gas-liquid separator 12 and the dehumidifier 16 side and the suction pressure by the pump 47 are reduced. Therefore, there is no possibility that condensed water reaches the gas-liquid separator 12 or the dehumidifier 16 side in a balanced manner, and dehumidification of the gas taken into the gas analyzer 21 is performed without any trouble. At the same time, discharge pipe 4
Even when the inner diameter of 3 is reduced to about 2 to 3 mm, the separated water can be smoothly discharged by forced suction and removal by the pump 47. Therefore, there is no fear that the trap device 46 becomes large in the height direction or the discharge pipe becomes thick, and the size of the device can be reduced. The pump 47
Is smaller than that of the gas suction pump 20, and the burden on cost is small.

Next, FIG. 2 shows a second embodiment of the present invention. In this embodiment, the discharge pipe 42 of the gas-liquid separator 12 is used.
Is connected near the upper end of the trap device 48, and the dehumidifier 16
The lower end of the discharge pipe 43 is disposed near the lower end inside the trap device 48. Further, the opening of the discharge pipe 44 in the trap device 48 is similar to that of FIG.
8 is located above the lower end of the discharge pipe 43 at a height substantially at the center. Also in this embodiment, the water seal of the discharge pipes 42 and 43 is maintained in a state where the condensed water is accumulated in the trap device 48. For other points, the discharge pipes 42, 4
Except that the positional relationship of FIG. 3 is opposite to that of FIG. 1, the operation, operation and effect are the same as those of FIG.

FIG. 3 shows a third embodiment of the present invention. In this embodiment, the discharge pipe 42 of the gas-liquid separator 12 is used.
And the lower end of the discharge pipe 43 of the dehumidifier 16 are both disposed near the lower end of the trap device 49, and the opening of the discharge pipe 44 in the trap device 49 is substantially It is arranged above the lower ends of the discharge pipes 42 and 43 at the height of the center. In this embodiment, a negative pressure is formed in the trap device 49 by the suction pressure of the pump 47, and the liquid levels of the discharge pipes 42 and 43 are lowered to the lower ends thereof. Then, the discharge pipes 42 and 43 and the gas-liquid separator 1
2. A small amount of gas is also sucked and discharged through the dehumidifier 16. In the present embodiment, the discharge pipes 42, 43
Can be kept at the lower end position, so that the dimension in the height direction can be shortened. Also, the discharge pipes 42, 4
Even when the inner diameter of 3 is reduced to about 2 to 3 mm, the separated water can be discharged smoothly. Therefore, also in this embodiment, the size of the device can be reduced.

Next, FIG. 4 shows the overall configuration of a wet gas analyzer in which the water discharging device according to the present invention is arranged at the subsequent stage of the measuring cell. Here, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals. In FIG.
Is a gas absorbing section for contacting and absorbing the exhaust gas from the absorbing liquid tank 63 to the absorbing liquid sent by the pump 64; 62 is a measuring cell having a chloride ion electrode as a sensor;
Is a supply pipe for supplying the liquid sample exiting the measurement cell 62 to the gas-liquid separator 12 '. In the figure, the pumps 47 and 64 connected by broken lines are interlocked, and the amount of liquid sent from the pump 47 is larger than the amount of liquid sent from the pump 64 because water in exhaust gas is also discharged in addition to the absorbing liquid. Has become.

In this embodiment, the gas-liquid separator 12 '
Has a function of separating gas absorbed in a liquid sample without being absorbed by the absorbing liquid from the absorbing liquid, and discharging both of them. Thereby, the burden on the dehumidifier 16 at the subsequent stage can be reduced. The gas flow rate and the absorption liquid flow rate can be separately measured by gas-liquid separation.

The trap device 48 'in FIG. 4 has the same structure as the trap device 48 shown in FIG. 2 in principle, and the discharge pipe 42 of the gas-liquid separator 12' is connected to the trap device 4 '.
The discharge pipe 43 of the dehumidifier 16 is connected to the vicinity of the lower end of the trap device 48 'and is open to the liquid.

The overall operation of the gas analyzer will now be described. The absorbing solution that has absorbed the exhaust gas in the gas absorbing section 61 is sent as a liquid sample to the measuring cell 62, and the chloride ion concentration is measured by the chloride ion electrode. Is done. Then, a value obtained by converting the chloride ion concentration into a hydrogen chloride concentration is indicated and recorded. The liquid sample after completion of the measurement is supplied to the gas-liquid separator 12 'while the gas not absorbed in the absorbing liquid is mixed. The gas mixed in the absorbing solution is supplied to the dehumidifier 1
The absorption liquid sucked and removed by the pump 20 via the pipe 6 and separated from the gas is sent from the discharge pipe 42 to the trap device 48 ′, and then discharged from the discharge pipe 45 by the pump 47 together with the moisture dehumidified by the dehumidifier 16. Is done.

In the above embodiment, the case where the present invention is used exclusively for an exhaust gas analyzer has been described. However, the field of application of the present invention is not limited to this. The present invention can be applied to various types of liquid discharge devices for separating, removing, and discharging a liquid from a sample for analysis of gas or liquid, flow measurement, and the like.

[0023]

As described above, according to the present invention, it is possible to reduce the size of a trap device for storing water separated and removed from a sample and its peripheral structure. Further, the pump for sucking and discharging the water only needs to have a small capacity and does not require an electromagnetic valve or the like, so that the cost burden can be reduced and the structure does not become complicated. Further, when the present invention is applied to an analyzer for exhaust gas generated by waste incineration,
Moisture and absorbent contained in the exhaust gas can be smoothly separated and discharged.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a main part of a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a gas analyzer showing an embodiment of the present invention.

FIG. 5 is a configuration diagram showing a first conventional technique.

FIG. 6 is a configuration diagram showing a second conventional technique.

FIG. 7 is a configuration diagram showing a third conventional technique.

[Explanation of symbols]

 Reference Signs List 11 heating conduit 12, 12 'gas-liquid separator 16 dehumidifier 20, 47, 64 pump 21 gas analyzer 22-24 gas supply pipe 25 discharge pipe 42-45 discharge pipe 46, 48, 48', 49 trap device 50 smoke Road 61 Gas absorption unit 62 Measurement cell 63 Absorption liquid tank 65 Supply pipe W Condensed water

Claims (3)

[Claims] 1. A sample in which gas and moisture are mixed is sucked,
In a water discharging apparatus for separating gas and water through a plurality of water separating means connected in series and discharging the separated water, a water discharging pipe provided in each of the water separating means is provided with a trap device. And the inside of these discharge pipes is kept in a water-sealed state via the trap device, and the water discharged from the respective discharge pipes to the trap device and stored is forcibly forced by a pump. Moisture discharge device characterized by suction and discharge. 2. The moisture discharging device according to claim 1, wherein the sample is an exhaust gas generated by incineration. 3. The moisture discharging device according to claim 1, wherein the sample is a liquid sample in which a gas is absorbed by an absorbing liquid.