JPH07174Y2 - Mixing tank for sample gas - Google Patents

Description

[Detailed description of the device]

[0002]

[Industrial application] The present invention uses a gas chromatograph or other analyzer to directly sample a sample gas from a main sample gas and measure the calorific value of the sample gas. The present invention relates to a sample gas mixing tank suitable for measuring an average calorific value according to the actual condition of the sample gas when the gas calorific value changes instantaneously with time.

[0003]

2. Description of the Related Art Conventionally, there has been a method of measuring the average calorific value of a sample gas by using a Junkers calorimeter stipulated by JISK2301. Although the average calorific value of the sample gas was obtained by continuously sampling and measuring continuously in small amounts over several minutes, the measurement takes time and labor, and
The measured values are also easily affected by individual differences and the environment.

Therefore, the average calorific value is measured by directly sampling the sample gas from the sample gas main pipe using an accurate analyzer such as a gas chromatograph.

[0005]

However, the measured value of the average calorific value of the sample gas in the sample gas main measured by an analyzer such as a gas chromatograph is instantaneous to the calorific value of the sample gas in the sample gas main. If there is a change with time, the sample gas sampling amount of these analyzers is a very small amount of a few milliliters,
Moreover, since the sampling time is instantaneous, there are some cases where the measured value of the calorific value of the sample gas measured with an analyzer such as a gas chromatograph and the average calorific value of the population are partly different. However, there is a problem in that the average calorific value of the sample gas in the sample gas main pipe cannot be constantly measured.

Therefore, the present invention is designed to measure the average calorific value of the sample gas in the main sample gas main body even if it is measured by an analyzer such as a gas chromatograph using an intermittent sample gas sampling method. Is intended to be obtained.

[0007]

In order to achieve the above object, the present invention has a structure as shown in FIGS. 1, 2, 3, 4, 5, 6, 7.

In order to improve the mixing by swirling the flow of the sample gas in the hollow cylindrical mixing tank main body 1 for mixing and retaining the sample gas, the mixing tank main body 1 The coiled pipe 2 was installed so as to be located in the circumferential direction or the tangential direction of the mixing tank body 1 from the upper, lower surface or upper side surface.

A sample gas inlet pipe 3 is connected to the extension of the coiled pipe 2 via a mixing tank body 1, and a sample gas outlet pipe 4 is provided on the upper surface or the lower side surface of the mixing tank body 1.

Further, a drain drain pipe 5 for draining drainage and a valve 6 in the drain drain pipe 5 are attached to the lower surface of the mixing tank body 1.

[0011]

If the above-mentioned sample gas mixing tank is installed near the entrance of the analyzer 11 such as a gas chromatograph, the average calorific value according to the actual condition of the sample gas in the sample gas main can be constantly measured. .

[0012]

Embodiments of the present invention will be described in detail with reference to FIG.

The sample gas main pipe 7 is a bypass pipe of the process pipe, and a constant flow rate of the sample gas is flowing inside the main pipe 7 and is constantly purged by the sample gas.

In the pre-measurement preparation, the suction pump 10 built in the analyzer 11 such as a gas chromatograph purges the sample gas branch pipe 8 to the analyzer 11 such as a gas chromatograph. The purge gas capacity is the mixing tank body 1
And the total capacity of the sample gas sampling pipe 9 of the analyzer 11 such as a gas chromatograph and the sample gas branch pipe 8 is about three times.

At the time of measurement, the mixing tank body 1 and the sample gas sampling pipe 9 of the analyzer 11 such as a gas chromatograph.
And the sample gas for the total volume of the sample gas branch pipe 8
The sample is taken over a time equivalent to the measurement time of the Junkers calorimeter specified in SK2301. At this time, the mixing tank body 1 contains sample gas well mixed and for the sampling time. Next, the well mixed sample gas in the mixing tank body 1 is sucked into the analyzer 11 such as a gas chromatograph, and the average calorific value is measured.

A large capacity of the mixing tank body 1 is good for mixing the sample gas, but it takes time to purge the mixing tank body 1. On the other hand, if it is too small, the mixed state of the sample gas deteriorates. Therefore, as a result of trial and error, the capacity of the mixing tank body 1 was set to 3 liters in the present embodiment, but the gas flow rate of the sample gas branch pipe 8 was 1.5 liters / minute and the pressure was 150 liters.
It is a desirable capacity when it is approximately mmH ₂ O, and is not limited to this.

Further, the drain 6 is appropriately drained by a valve 6 provided in the drain drain pipe 5 so that the drain does not enter the analyzer 11 such as a gas chromatograph.

The mounting positions of the coiled pipe 2, the sample gas inlet pipe 3 and the sample gas outlet pipe 4 are determined by the specific gravity of the sample gas. When the specific gravity of the sample gas is smaller than that of air, as shown in FIGS. 1 and 5, the coiled pipe 2 and the sample gas-containing pipe 3 are on the upper surface or the side surface of the mixing tank body 1, and the sample gas outlet pipe 4 is the mixing tank. It is preferable to provide the lower part of the side surface of the main body 1 in terms of mixing the sample gas. When the specific gravity of the sample gas is larger than that of air, as shown in FIG. 7, the coiled pipe 2 and the sample gas inlet pipe 3 are attached to the lower surface of the mixing tank main body 1 at a height where the drain does not flow into the sample gas outlet pipe. Four
It is preferable to provide it on the upper surface of the mixing tank body 1 in terms of mixing the sample gas.

The shape of the coiled pipe 2 is as shown in FIGS. 1, 2, 3, 4, 5, 6, and 7 in this embodiment. Is not limited to this as long as it has a function of turning in the circumferential direction or the tangential direction.

[0020]

[Effects of the Invention] By using the sample gas mixing tank of the present invention, even if the sample gas is directly sampled from the sample gas main line and the calorific value is measured using an analyzer such as a gas chromatograph, Despite the instantaneous change over time of the heat generation amount of the sample gas in the sample gas main pipe, the average heat generation amount according to the actual condition can be constantly measured.

[Brief description of drawings]

FIG. 1 is a perspective view of a sample gas mixing tank according to an embodiment of the present invention.

FIG. 2 is a plan view of a sample gas mixing tank according to an embodiment of the present invention.

FIG. 3 is a front view of a sample gas mixing tank according to an embodiment of the present invention.

FIG. 4 is a right side view of a sample gas mixing tank according to an embodiment of the present invention.

FIG. 5 is a perspective view of a sample gas mixing tank according to another embodiment of the present invention.

FIG. 6 is a plan view of a sample gas mixing tank according to another embodiment of the present invention.

FIG. 7 is a perspective view of a sample gas mixing tank according to another embodiment of the present invention.

FIG. 8 is a schematic configuration diagram when the sample gas mixing tank according to the present invention is used.

[Explanation of symbols]

 1 Mixing tank main body 2 Coiled pipe 3 Sample gas inlet pipe 4 Sample gas outlet pipe 5 Drain drain pipe 6 Valve 7 Sample gas main pipe 8 Sample gas branch pipe 9 Sample gas sampling pipe 10 Suction pump 11 Analyzer

Claims (1)

[Claims for utility model registration] [0001] 1. A mixing tank main body 1, a coiled pipe 2 incorporated from the upper, lower or side surfaces in the mixing tank main body 1, and a sample gas filled pipe 3 connected to the extension of the coiled pipe 2 via the mixing tank main body 1. A sample gas mixing tank comprising a sample gas outlet pipe 4 provided on the upper surface or side surface of the mixing tank body 1, a drain drain pipe 5 provided on the lower surface of the mix tank body 1, and a valve 6 provided in the drain pipe 5.