Light-scattering dust concentration meter and method for measuring dust concentration
A technology of dust concentration and light scattering, which is applied in the measurement of scattering characteristics, etc., can solve the problems of no prevention mechanism and influence, and achieve the effect of easy operation and low installation cost.
Active Publication Date: 2019-03-26
TANAKA ELECTRIC LAB CO LTD
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Problems solved by technology
However, when the flow velocity of the turbid exhaust gas is slower than about 2m / sec, the surrounding turbid exhaust gas is drawn into the scattered light detection area 8, and the measured value of the light scattering dust concentration meter 1 is affected by water vapor mist
[0014] In addition, when the patent document 2 was filed, the light-scattering dust concentration meter 1 inserted into the flue 6 was at a high temperature. Therefore, it was considered that the water vapor dust in the turbid exhaust gas was heated and dried. There is no special prevention mechanism for the dust pollution of the concentration meter 1
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Embodiment 1
[0099] FIG. 1 is a schematic diagram of an embodiment of a light-scattering dust concentration meter capable of measuring even low flow rate exhaust gas according to the present invention. The measurement principle is as follows: in the flue 6, a gasification device 2 is arranged on the upstream side of the turbid exhaust gas flow to gasify the mist 10, and the measurement light 4a is irradiated downstream of the gasification device 2, and the light scattering intensity is measured. dust concentration. In addition, the left hollow arrow in FIG. 1 indicates the flow direction of the turbid exhaust gas, the right side of FIG. 1 is the upstream of the turbid exhaust gas, and the left side is the downstream of the turbid exhaust gas.
[0100] As shown in FIG. 1 , an example of an embodiment of the present invention, that is, a light-scattering dust concentration meter 1c capable of measuring even low-velocity exhaust gas includes a gasification device 2, an optical unit 9, a compu...
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A light-scattering type dust concentration meter capable of measuring even waste gas having a low flow speed is provided. Even turbid waste gas in a flue is low in speed, the light-scattering type dust concentration meter can be continuous and accurate and can direct6ly measure the dust concentration of the turbid waste gas in the flue for long term. The dust concentration meter measures in the flue the dust concentration of the turbid waste gas directly and comprises a gasification device, an air blower device and the like, wherein the gasification device gasifies thin mist in the turbid waste gas that is a measurement object after the turbid waste gas is separated in the flue, the air blower device allows a gas curtain to be formed at the downstream of the gasification device, the gas curtain separates a zone which maintains a state that the thin mist is gasified through the gasification device and turbid waste gas does not passing through the gasification device, and scattered light reflected by dust after removal of the thin dust is detected in the gas curtain to obtain the dust concentration of the turbid waste gas.
Description
technical field [0001] The present invention relates to a dust concentration meter, and more specifically, to a light-scattering dust concentration meter capable of measuring even low-velocity exhaust gas, and a method for measuring dust concentration even if the flow of turbid exhaust gas is low. It is also possible to measure the dust concentration in the turbid exhaust gas directly in the flue directly, continuously and accurately, and for a long time in the flue which is below the dew point so that the mist (droplet particles) and dust (solid particles) are adsorbed and coexist. . Background technique [0002] The exhaust gas discharged from the flue of various factories contains a large amount of harmful substances such as sulfides and nitrogen oxides. Therefore, it is obligatory to install exhaust gas treatment devices such as desulfurization devices and denitrification devices in the exhaust gas path. [0003] On the other hand, there are also prescribed emission co...
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IPC IPC(8): G01N21/53
Inventor 田中敏文
Owner TANAKA ELECTRIC LAB CO LTD