KR101834232B1 - Gas measuring apparatus with multi-gas cell structure for measuring multi-point - Google Patents

Abstract

The present invention relates to a gas measurement device with a multi-gas cell structure for multi-point measurement for measuring multi-point sampling gas by using a gas measurement device having a light source, a gas cell, and a detector. The present invention comprises the gas cell in which the light source and sample gas such as standard gas or exhaust gas pass through and one detector is arranged in a line on an optical path. The gas cell comprises a multi-gas cell in which the plurality of gas cells are arranged side by side so as to be parallel to the optical path. Each of the gas cells has a gas inlet and a gas outlet, separately. And the sample gas such as the standard gas and the exhaust gas is configured to pass through the inside of the cell. Therefore, price (cost), space, measurement time, and the like can be reduced.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-

The present invention relates to a gas measurement apparatus of a multi-gas cell structure for multi-point measurement, and more particularly, to a gas measurement apparatus having a gas source having a light source, a gas cell and a detector In the measuring apparatus, a multi-gas cell structure capable of passing a plurality of gases in a stepwise manner with a time difference in the gas cell structure is constituted, and light emitted from one light source is injected into each gas cell It is possible to save time (cost), space, and measurement time by making it possible to calculate stepwise by making a time difference in time with one detector after making a time difference. The present invention relates to a gas measuring device of a gas cell structure.

Generally, in the conventional gas measuring apparatus, one gas cell and one detector are arranged in a line on the path of light emitted from one light source. As illustrated in FIG. 1, A first optical lens 12 and an optical filter 13 for refracting and filtering the light emitted from the light source 11 so that light of a specific wavelength passes through the inside of the gas cell 14, A gas cell 14 having a gas injection port a and a gas discharge port b respectively disposed on the path of light passing through the inside of the cell and emitted from the light source 11, And a second optical lens 15 and a detector 16 for concentrating and detecting one light.

In this conventional gas measuring apparatus, the harmful gas is continuously passed through one gas cell 14 and passed through the gas cell 14 by using one light source 11 and one detector 16 or a detector or spectrometer. The concentration of the noxious gas to be detected.

However, as is well known, since combustion gas discharged from combustion in power generation or industrial boilers discharges harmful environmental pollutants, it is legally regulated to discharge at a certain concentration or less depending on the types thereof. In order to ensure reliability, the air pollution process test method is designated and implemented.

In order to reduce the emission of environmentally pollutant substances and to diagnose and evaluate the burning state, which is legally regulated as above, there has been an operation for sampling and analyzing the exhaust gas at a plurality of points in the duct at any time during combustion. A large number of personnel are required to manually perform an exhaust gas measurement operation over a long period of time so that not only a large amount of measuring force is required but also the measurement force is held for a long time around the noxious gas emission source, And it needs to be prepared.

In this connection, Korean Patent Laid-Open No. 10-2005-0099808 (published on Oct. 17, 2005, hereinafter abbreviated as "Patent Document 1") discloses a method in which various types of combustion gases emitted during combustion in power generation or industrial boilers are subjected to air pollution Techniques relating to a multi-point combustion gas automatic sampling measuring apparatus for sampling and analyzing at various positions based on the process test method are known.

According to Patent Document 1, the combustion gas can be automatically sampled and analyzed from a plurality of probes provided at a plurality of combustion points in combustion gas ducts discharged from power generation or industrial boilers and the like, Gas can be sampled and unmanned operation eliminates the necessity of resident manpower in many labor and hazardous gas areas, thereby eliminating the risk of harming the health of the manpower, saving manpower and preventing industrial accidents in advance .

However, in the conventional measuring apparatus as described above, since a plurality of measuring devices are directly installed at a plurality of combustion points in the gas duct to sample the sample gas, a gas measuring device is required for the required number of measuring points, There is a concern that the installation space and the installation time may be wasted.

Also, in the case of a gas measuring apparatus having one gas cell as described above, it is necessary to selectively flow a gas between the sampling tube and the gas cell through a valve. In this case, much time is delayed in the process of completely exhausting the inhaled gas There was a problem.

In recent years, there is a demand to know the spatial distribution of the gas through the measurement of the noxious gas, or to grasp the concentration of the gas in the duct or the noxious gas flow. Through this, the design of the plant, And 3D data with big data and gas concentration are required.

Korean Patent Publication No. 10-2005-0099808 A 2005.10.17. open

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a gas measuring device having a light source, a gas cell and a detector, A multi-gas cell structure capable of passing a plurality of gases in a stepwise manner, and the light emitted from one light source is staggered into the respective gas cells with a time difference therebetween, By performing the calculation process step by step, a separate exhausting time for exhausting the sample gas sucked into the gas cell is not required, so that the multi-point measurement (cost), space and measurement time can be saved A gas measuring device of a multi-gas cell structure.

According to an aspect of the present invention, there is provided a gas measurement method in which a gas cell through which a sample gas such as a standard gas or an exhaust gas passes, and a detector are arranged in a line on a light path, In the apparatus, the gas cell is composed of a multi-gas cell in which a plurality of gas cells are arranged side by side so as to be parallel to the path of light, and each gas cell is provided with a gas inlet and a gas outlet, Is configured to pass through the interior of the cell, respectively.

An optical path selector provided with a plurality of shutters for selecting an optical path such that the path of light travels through any one of the plurality of gas cells, The present invention can be embodied in other embodiments.

Another embodiment of the present invention may further be embodied in another embodiment, further including an optical path control section for controlling a path selection operation of light in the optical path selection section.

In the present invention, the optical path control unit controls the progress path selection operation of the light in the optical path selection unit in a stepwise manner with a time difference.

In the present invention, the multi-gas cell is connected to each sample probe, sample gas at each point is continuously passed through a gas inlet and a gas outlet of each gas cell, and the sample gas is passed through each gas cell stepwise by opening / And the concentration calculation of the sample gas is performed.

According to the present invention, a multi-gas cell in which a plurality of gas cells are combined is provided between one light source and a detector, and light emitted from one light source is supplied to each gas cell in the multi- It is possible to perform the calculation process step by step with a difference in time in one detector after stepping on the difference in gas pressure. Therefore, no separate exhaust time is required by using different gas cells, Space, measurement time, and the like.

1 is a schematic view illustrating a conventional gas measuring apparatus.
2 is a schematic view illustrating a gas measurement apparatus of a multi-gas cell structure for multipoint measurement according to the present invention.
FIG. 3 is a reference view illustrating a sample gas flow injected into each gas cell in a gas measurement apparatus of a multi-gas cell structure for multipoint measurement according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration and operation of a gas measurement apparatus of a multi-gas cell structure for multi-point measurement according to a preferred embodiment of the present invention and its operation and effect will be described in detail with reference to the accompanying drawings.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention. Therefore, it should be understood that the embodiments described herein and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and that various equivalents and modifications may be substituted for them at the time of the present application shall.

FIG. 2 is a schematic view illustrating an overall configuration of a gas measurement device of a multi-gas cell structure for multi-point measurement according to the present invention, and FIG. 3 is a schematic diagram of a gas measurement device of a multi- As a reference for illustrating the flow of the sample gas injected into each gas cell, the gas measuring apparatus according to the present invention is a gas measuring apparatus according to the present invention, in which a plurality of gas cells 20a to 20c are combined, The optical path selecting unit 30 or the optical path selecting unit 30 and the optical path control unit 40 and the signal processing unit 50, But may be implemented in other embodiments. The gas measuring device according to each of the embodiments of the present invention is a gas measuring device in which a gas cell through which a sample gas such as a standard gas or an exhaust gas passes, and a detector are arranged in a line on a light path And can be implemented.

The gas measuring apparatus according to the present invention includes a light source 11 for emitting light, a first optical lens 12 disposed apart from the light path behind the light source 11 to refract light to emit parallel light, An optical filter 13 which is disposed on the optical path behind the first optical lens 12 to filter the parallel light and to enter the multi gas cell 20; A second optical lens 15 for refracting the parallel light that has passed through the multi gas cell 20 and concentrating the light at one point and a second optical lens 15 disposed at the end of the optical path behind the second optical lens 15, As a basic component, a detector 16 for detecting light concentrated at one point and calculating the gas concentration. The optical filter 13 may be omitted if necessary. In the following description of the present invention, the optical filter 13 will be described as an example.

The multi-gas cell 20 is constructed by arranging a plurality of gas cells 20a-20c in parallel so as to be parallel to the optical path, and preferably, three or four gas cells having a circular or regular shape are arranged in the optical path And arranged in parallel to each other. In the following detailed description and drawings, the case where three gas cells 20a to 20c are combined is described as an example.

Each gas cell 20a-20c constituting the multi-gas cell 20 is provided with a gas inlet port (a) and a gas outlet port (b), and each of the gas cells 20a- 2c are connected through a tube 1 to the gas inlet port a of each of the sample probes 2a to 20c so as to collect sample gas at a plurality of points, The sample gas taken in the gas cells 20a-20c is injected into the gas injection port a of each of the gas cells 20a-20c through the respective filters 3a-3c, Pumps 4a to 4c for forcibly discharging the gas inside the cell are connected to the gas outlet b so that the sample gas such as the standard gas or the exhaust gas passes through the inside of the cell, The sample (measurement) gas flow into the cell is allowed to pass continuously at all times, Is configured to pass light in sequence for each cell, it will only be implemented in a structure for measuring the gas concentration point as changing only the optical path. By using such a multi-gas cell, it is possible to successively measure the sample gas sucked in from multiple points (sampling probe 1, probe 2, probe 3) by passing light sequentially through each gas cell with a time difference, It will be possible to continuously suck and pass the multi-gas cell.

The optical path selecting unit 30 is disposed on the optical path in front of the multi-gas cell 20, and selects the optical path such that the path of light travels through any one of the plurality of gas cells 20a-20c. The light path selecting unit 30 includes a plurality of through holes 31a each having a size corresponding to an inner diameter of each of the gas cells 20a to 20c of the multi gas cell 20, Shaped bodies 31 each having a shutter 31b that is opened or closed or a single passage hole 32a having a size corresponding to the inside diameter of each gas cell 20a to 20c of the multi- And a disk-shaped rotating body 32 formed to be rotatable with respect to the center point 32b.

Shaped body 31 having a plurality of shutters 31b, the optical path selecting unit 30 includes a plurality of shutters 31a, 31b, 31c, And the path of the parallel light incident on any one of the gas cells 20a-20c is selectively opened or closed by driving (opening / closing) of the shutters 31b, The single passage hole 32a corresponds to any one of the gas cells 20a to 20c of the multi gas cell 20 in the case of the disk rotor 32 formed with the single passage hole 32a It is preferable that the position of the single passage hole 32a is controlled by controlling the rotational position of the disk-shaped rotor 32 so as to be controlled.

The light path control unit 40 controls the opening / closing of the respective shutters 31b of the optical path selecting unit 30 step by step with a time difference or controls the position of the single passage hole 32a, The optical path selection operation is sequentially controlled with a time difference. For example, in the case where the optical path selecting unit 30 is formed of a disk-shaped body 31 having a plurality of shutters 31b, the optical path control unit 40 controls the opening and closing of the respective shutters 31b And the optical path selecting unit 30 is constituted by a disk-shaped rotating body 32 having a single passage hole 32a, the optical path control unit 40 controls the position of the single passage hole 32a do.

The light path control unit 40 controls the signal processing unit 50 in conjunction with the opening / closing operation of each shutter 31b of the optical path selecting unit 30 or the position control operation of the single passage hole 32a, And the signal of the gas cell 16, which is the signal of which gas cell or which point. Thus, the optical path control unit 40 designates the optical detection signal of the detector 16 and the optical path selection (that is, the gas cell through which the light passes) to the signal processing unit 50, and calculates the concentration of each cell in a stepwise .

In order to perform this operation, the light path control unit 40 controls the light path selection operation of the light path by each shutter 31b or the single path hole 32a of the light path selecting unit 30 in a stepwise manner And the signals inputted from the detector 16 are distinguished by controlling the signal processing unit 50 so as to be interlocked with the optical path selecting unit 30 so that the signals of the respective gas cells 20a to 20c processed by the detector 16 The photodetection and concentration calculation operation for any one can be sequentially performed according to the time difference corresponding to the opening and closing of each shutter 31b of the optical path selector 30 or the rotation position of the single pass hole 32a .

The signal processing unit 50 is controlled in operation by the optical path control unit 40 to obtain the optical detection signal of the detector 16 for the optical path selected by the optical path selecting unit 30 to perform the density calculation. Thereby, the signal processing unit 50 acquires the optical detection signal of the detector 16 at a time interval coinciding with the optical path (i.e., the gas cell through which the light passes) specified by the optical path control unit 40, And performs the calculating operation stepwise.

The operation and effect of the gas measuring apparatus of the multi-gas cell structure for multi-point measurement according to the present invention constructed as described above will be described below.

First, when light is emitted from the light source 11, the light is refracted by the first optical lens 12 disposed on the optical path behind the light source 11 and emitted as parallel light, and this parallel light is transmitted through the first optical lens 12), and reaches the optical path selecting unit 30 interposed on the optical path in front of the multi-gas cell 20. The optical path selecting unit 30 shown in FIG.

On the other hand, the optical path control unit 40 controls the opening and closing operations of the shutters 31b of the optical path selecting unit 30 in a stepwise manner with a time difference (for example, a time difference may be preset by a program) The path of the light travels through one of the gas cells 20a-20c of the multi-gas cell 20 depending on the opening / closing of each shutter 31b of the light path selecting unit 30 or the rotation position of the single passage hole 32a (Not shown) of the detector 16 corresponding to the opening / closing of the shutter 31b of the optical path selector 30 or the rotation position control operation of the single pass hole 32a in the signal processor 50, The signal processing unit 50 obtains the photodetection signal of the detector 16 at a time interval coinciding with the optical path sequentially designated by the optical path control unit 40 so as to calculate the concentration of each cell .

The parallel light reaching the optical path selecting unit 30 is guided to the optical path control unit 40 among the plurality of shutters 31b provided in correspondence with the respective gas cells 20a to 20c of the multi gas cell 20 in a one- 20c of the multi-gas cell 20 through one of the plurality of gas cells 20a, 20b, 20c, 20c, 20a, 20b, 20c and 20c through the single passage hole 32a. That is, the parallel light reaching the light path selecting unit 30 is determined by the opening or closing operation of each shutter 31b of the light path selecting unit 30, or the light path of the light according to the rotating position of the single hole 32a Gas cell 20a-20c of the multi-gas cell 20 and is refracted by the second optical lens 15 disposed on the optical path behind the multi-gas cell 20, The detector 16, which is disposed at the rear of the second optical lens 15 and disposed at the optical path end behind the second optical lens 15, detects light concentrated behind the second optical lens 15.

The signal processing unit 50 specifies and acquires the photodetection signal of the detector 16 at a time interval coinciding with the optical path sequentially designated by the optical path control unit 40 so that the signal processing unit 50 can acquire, It is possible to separately detect the signal at any point and calculate the gas concentration.

Thus, the gas measuring apparatus according to the present invention uses a multi-gas cell composed of a plurality of gas cells of a circular or regular shape arranged in parallel so as to be parallel to the traveling path of light, sequentially passing light in each gas cell with a time difference , Each sample gas continuously sucked in from multiple points (sampling probe 1, probe 2, probe 3) can be sequentially measured by one detector, so that cost (cost), space and measurement time can be saved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, it is intended that the scope of the invention be defined by the claims appended hereto, and that all equivalent or equivalent variations thereof fall within the scope of the present invention.

1: sample tube 2a-2c: sample probe
3a-3c: Filters 4a-4c: Pumps
11: light source 12: first optical lens
13: Optical filter 14, 20a-20c: Gas cell
15: first optical lens 16: detector
20: multi gas cell 30: light path selector
31: disk-shaped body 31a: through hole
31b: shutter 32: disk-shaped rotating body
32a: single pass hole 32b: center point
40: light path control unit 50: signal processing unit
a: gas inlet b: gas outlet

Claims (6)

1. A gas measuring device in the form of a gas cell in which one light source and a sample gas pass, and one detector are arranged in a line on an optical path,
The gas cell includes:
A plurality of gas cells 20a-20c are arranged side-by-side in parallel with the optical path,
Each of the gas cells 20a-20c is provided with a gas inlet port (a) and a gas outlet port (b) so that the sample gas passes through the interior of the cell,
And an optical path selector 30 interposed on the optical path in front of the multi-gas cell 20 to select an optical path such that the path of light travels through any one of the plurality of gas cells 20a-20c ≪ / RTI >
The optical path selector 30,
A plurality of through holes 31a each having a size corresponding to the inner diameter of each of the gas cells 20a to 20c of the multi gas cell 20 are formed and a shutter 31b for opening or closing the respective through holes 31a is formed A disk-shaped body (31) provided with the disk-shaped body (31);
A disk-shaped rotating body 32 having a single passage hole 32a having a size corresponding to the inside diameter of each gas cell 20a-20c of the multi-gas cell 20 and being rotatable with respect to the center point 32b, ; , And < RTI ID =
The disk-shaped body (31)
A number of through holes 31a and a shutter 31b corresponding to the respective gas cells 20a-20c of the multi-gas cell 20 are formed respectively, and by driving the shutters 31b, 20a, 20a, 20a, 20a, 20a, 20a, 20a, 20a, 20a, 20a, 20a, 20b, 20c and 20d. delete delete delete The method according to claim 1,
The control unit 30 controls the opening and closing of each shutter 31b of the optical path selector 30 or the optical path selection operation of the optical path by the single passage hole 32a and selects the optical path corresponding to the optical path selected by the optical path selector 30. [ An optical path control unit (40) for designating the optical detection signal of the detector (16) to the signal processing unit (50);
And a signal processing unit (50) which is controlled by the optical path control unit (40) and obtains an optical detection signal of the detector (16) for the optical path selected by the optical path selection unit (30) Wherein the gas measuring device is a multi-gas measuring device. 6. The apparatus according to claim 5, wherein the light path control unit (40)
(a) a stepwise control of the progress path selection operation of the light by the opening and closing of each shutter 31b of the light path selector 30 or the control of the rotation position of the single hole 32a,
(b) designating an optical detection signal of the detector 16 corresponding to the optical path selection of the optical path selector 30 to the signal processing section 50 so that the signal processing section 50 can adjust the gas concentration of each point to the optical path Wherein the control unit controls the selection unit (30) to perform sequential measurement at a time interval by opening / closing each shutter (31b) or rotation position control of the single passage hole (32a).

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