JP2584723Y2 - Gas analyzer sampling equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a sampling device of a gas analyzer (hereinafter, simply referred to as a sampling device).

[0002]

2. Description of the Related Art For example, when a gas flowing in a flue gas is continuously analyzed by a gas analyzer, the flue gas and the gas analyzer are kept constant in order to keep the pressure and flow rate of a sample gas supplied to the gas analyzer constant. In general, a constant-pressure trap is interposed in a sample gas flow path connecting the sample gas and a part of the sample gas to bubble. In this case, the liquid level in the constant pressure trap cannot be maintained at a constant depth if the sample gas does not bring in moisture. Therefore, the conventional sampling device is configured as shown in FIG. 2 , for example.

That is, in FIG. 2 , reference numeral 1 denotes a sample gas flow path for supplying a sample gas G collected by a probe (not shown) provided so as to face a flue to a gas analyzer 2. A wet filter 3 for separating drain contained in the sample gas G, a pump 4 for sucking the sample gas, and an electronic cooler for removing moisture contained in the sample gas G are provided in the flow path 1 from the upstream side thereof. 5 are provided in this order. Reference numeral 6 denotes a constant pressure trap for keeping the pressure and flow rate of the sample gas G supplied to the gas analyzer 2 constant, and is connected to the electronic cooler 5 by a drain flow path 7. Reference numeral 8 denotes an overflow trap connected to the constant pressure trap 6 via a communication pipe 9. Reference numeral 10 denotes an exhaust port 1 provided in the constant pressure trap 6.
An exhaust pipe connected to 1, an overflow pipe 12 connected to an overflow port 13 of the overflow trap 8, and a small hole 14 for opening to the atmosphere. The configuration up to this point is not much different from that disclosed in, for example, Japanese Utility Model Publication No. 55-10927.

[0004] Reference numeral 15 denotes a water supply pipe for supplying tap water to the constant pressure trap 6, for example, and reference numeral 16 denotes a needle valve.

In the sampling device configured as described above, the overflow trap 8 is connected to the constant-pressure trap 6 through the communication pipe 9 even if the amount of the sample gas G to be collected increases suddenly for some reason. Therefore, the pressure and flow rate of the sample gas G supplied to the gas analyzer 2 do not fluctuate. If the amount of water contained in the sample gas G is small, the liquid level in the constant pressure trap 6 decreases, and the predetermined water level cannot be maintained. In such a case, the needle valve 16 is opened to supply tap water to the constant pressure trap 6. The water level in the constant pressure trap 6 can be maintained at a predetermined level.

[0006]

However, according to the above configuration, it is necessary to constantly monitor the water level in the constant pressure trap 6 or to provide a sensor for detecting the water level. In addition, the needle valve 1
5, the pressure in the constant pressure trap 6 may fluctuate. As a result,
There is an inconvenience that the pressure and the flow rate of the sample gas G supplied to the gas analyzer 2 fluctuate.

[0007] The present invention has been made in consideration of the above-mentioned matters, and its purpose is to reduce the liquid level in the constant pressure trap without adversely affecting the pressure and flow rate of the sample gas to the gas analyzer. It is an object of the present invention to provide a sampling device that can always maintain a constant water level.

[0008]

To achieve the above object, according to an aspect of, the present invention employs the following hand stage.

[0009] In other words, the hand stage of this is, for the gas analyzer
Cooler in the sample gas flow path to supply sample gas
As well as receiving the drain discharged from this cooler.
And the pressure of the sample gas supplied to the gas analyzer.
And constant pressure trap for constant flow
Gas analysis with an overflow trap connected via a tube
In the sampling device, a water supply tank is connected to a downstream end of an overflow pipe provided in the overflow trap, and water in the water supply tank is constantly supplied to the constant pressure trap via a pump.

[0010]

[Function] A constant pressure track from the water supply tank by the suction pump.
Water is always supplied to the pump.

The constant pressure trap is connected via a communication pipe.
Since it is connected to the overflow trap,
Water is supplied to the overflow trap provided in the overflow trap.
Return to the water tank from the low port, and the liquid level in the constant pressure trap
It is always kept at a constant water level.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the following description, members denoted by the same reference numerals as those in FIG. 2 are the same.

FIG. 1 schematically shows the configuration of a sampling device according to an embodiment of the present invention .

[0014] In the figure, 17 is overflow tiger
So that it is located below the overflow port 13 of the
For example, a water tank made of transparent resin
Tap water is stored.

Then, the water contained in the sample gas G is removed.
The electronic cooler 5 for removal and the constant pressure trap 6 are drained.
It is connected by an air passage 7 .

The drain contained in the sample gas G
Filter 3 and constant pressure trap 6 for separating
Are connected by a drain channel 27. That is,
The drain passage 27 is provided for overflowing the wet filter 3.
Port 28 and the drain inlet 29 of the constant pressure trap 6.
Huh.

Further, the water supply tank 17 has an overflow
Contact with the downstream side of the overflow pipe 12 connected to the port 13
And the drain in the overflow trap 8 flows in
It is so. And this water supply tank 17 is
Water supply pipe with needle valve 30 and suction pump 31
32 and connected to makeup water inlet 33 of constant pressure trap 6
Have been.

In this sampling device, the suction port
By constantly operating the pump 31, the water tank 17
The water inside is trapped by the constant pressure trap 6 through the needle valve 30.
At a constant flow rate.

The constant-pressure trap 6 is connected via a communication pipe 9.
Connected to the overflow trap 8
Excess water is supplied to the overflow trap 8
From the overflow port 13 through the overflow pipe 12
Return to the inside of the water tank 17.

Therefore, the liquid level in the constant pressure trap 6 is always the same.
It is kept at a constant water level.

According to this embodiment, the overflow tracing
Start or stop of water supply to pump 8 and constant pressure trap 6
Is performed automatically and, as before, is monitored by humans or
There is no need to provide a position sensor.

[0022] The sampling device according to the above you施例not only analysis of the flue gas, also of course be used in other gas analysis.

[0023]

As has been described above devised], it is possible to continuously supply the sample gas at constant pressure and constant flow rate with respect to gas analyzer, therefore, can be stably performed gas analysis.

Using a pump , the liquid level in the constant pressure trap can be automatically maintained at a constant water level, and the entire apparatus can be easily maintained.

[Brief description of the drawings]

1 is a diagram showing a configuration example of a sampling device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a conventional sampling device .

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sample gas flow path, 2 ... Gas analyzer, 3 ... Wet filter, 5 ... Cooler, 6 ... Constant pressure trap, 7, 27 ...
Drain channel, 8 ... Overflow Trap, 9 ... communication pipe, 12 ... overflow pipe, 13 ... overflow port, 17 ... water tank, 3 2 ... water supply pipe, 3 1 ... pump,
G: Sample gas.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01N 1/22 G01N 1/00

Claims (1)

(57) [Scope of request for utility model registration] With 1. A provision of the cooler sample gas flow path for supplying the sample gas to the gas analyzer, the cold
Receiving a drain discharged from却器, gas analyzer sampling of connecting the overflow trap through the communicating pipe relative pressure trap to a constant pressure and flow rate of the sample gas supplied to said gas analyzer equipment to
Oite, O provided in the overflow trap
Connect the water supply tank to the downstream end of the bar flow pipe, and
The water in the tank is constantly transferred to the constant pressure trap via a pump.
A sampling device for a gas analyzer, characterized in that it is supplied .