JPH049642A - Instrument for measuring melting color - Google Patents

Abstract

PURPOSE:To measure a melting color by arranging a steam jacket on the outside of a liquid tank, arranging heat insulating plates having windows between a light source and the liquid tank and between the liquid tank and a detecting part and forming a cooling water reflux passage between the light source and the detecting part. CONSTITUTION:Power is controlled by a control board 22 to emit a lamp 12. An optical system 13 converts light into parallel beams with wavelength lambda1 in which light is not almost absorbed into a melt and wavelength lambda2 in which light is strongly absorbed. The parallel beams are made incident upon the detecting part through a glass plug 10, a plate 16, the liquid tank, a plate 17, and a plug 11. The light components with the lambda1, lambda2 are respectively reflected by mirrors 18, 19 and converted into electric signals by photoelectric conversion elements 20, 21 and the electric signals are compared with each other to determine the level of the melting color. The heat insulating plates 6, 7 are fixed to the flanges 1c, 1d of the liquid tank and cooling plates 8, 9 are arranged between a light source case 2 and a detecting part case 3. Passages 8a, 9a are formed in the cooling plates 8, 9 and cooling water supplying pipe connection holes 8b, 9b and recovery pipe connection holes 8c, 9c are formed. In the constitution, the melting color is always automatically and appropriately measured and record through an on-line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color analyzer, and particularly to a device for online measuring the melt color of organic substances.

[Conventional technology]

One of the parameters that indicates the quality of organic substances, etc. is the so-called MC, or melt color, and was a resin melt color measurement device, which is a type of absorbance analyzer, used to measure it?
Until now, no apparatus has been proposed that can suitably measure the melting color of organic substances, etc., particularly those with high melting temperatures, online.

For this reason, in the past, organic substances, etc. were dissolved in an organic solvent and measured using a standard spectrometer at room temperature, but with this method, it was impossible to measure the melt color itself. However, since bisphenol A and the like oxidize when exposed to air, the operation for measurement was complicated, and there was no hope of making it basolateral or online.

[Problem that the invention seeks to solve]

The present invention has been made based on the above-mentioned viewpoints, and an object of the present invention is to provide a melting color measuring device for organic substances having a high melting temperature, such as bisphenol.

These melt color measurement devices are a type of absorbance analyzer, and include a light source that generates parallel light beams containing light of at least two different wavelengths, and a molten material such as an organic substance whose melt color is to be measured. A liquid tank part that allows the parallel light to pass through the inside of the melt, and a detection part that spectrally spectra the light transmitted through the melt in the liquid tank and compare the intensities. .

[Means for solving problems]

The above purpose is to provide a steam jacket on the outside of the liquid tank in the known fused color measuring device, and to install liquids between the light source and the liquid tank and between the liquid tank and the detection unit. A heat insulating board made of a heat insulating material and provided adjacent to the liquid tank and having a window for transmitting light transmitted through the tank, and a heat insulating board made of a heat insulating material provided adjacent to the liquid tank, respectively, are provided between the heat insulating board and the light source section and the detection section, and there is cooling water inside. A cooling plate is provided, which is provided with a flow path through which the flow passes, and has a light transmission window at a position corresponding to the light transmission window of the heat insulating plate, and cooling air that communicates with the inside of the outer casing of the light source section and the detection section is provided. This is achieved by providing a supply path.

[Best mode for carrying out the invention]

Hereinafter, the present invention will be explained in detail with reference to the drawings.

The drawing is a sectional view showing the main part configuration of the fused color measuring device according to the present invention.

In the figure, 1 is the outer casing of the liquid tank section, 2 is the outer casing of the light source section,
3 is the outer casing of the detection section, 4 is the control panel outer casing for the light source section, 5 is the converter outer casing for the detection section, 6 and 7 are heat insulation plates, 8 and 9 are cooling plates, 10 and 11 are transparent glass stopper, 12 is a lamp,
13 is an optical system that generates parallel light beams of desired wavelengths for comparison and measurement, and 14 and 15 are heat-resistant glass plates 16, respectively.
18 and 19 are ichroic mirrors that reflect only light of wavelengths for comparison and measurement, respectively, 20 and 21 are photoelectric conversion elements, 22 is a light source control panel, and 23 is a detection unit. The circuit boards 24 and 25 are covers for the control panel outer casing and the converter outer casing.

The liquid tank outer casing 1 is attached by flanges 1a and 1b to a production line for organic substances such as bisphenol, and a molten organic substance (hereinafter abbreviated as molten substance) flows through the inside thereof. The liquid tank outer casing 1 has a light source mounting flange lc and a detection unit mounting flange ld, and its main pipe has a steam jacket 1e, a steam supply pipe connection hole 1f, and a drain recovery pipe connection hole 1g. Glass plate mounting bosses 1h and li are provided in order to form a transparent partition wall that allows light to enter and pass through the main pipe portion.
Glass plates 16 and 17 are fitted here and fixed with metal fittings 14 and 15.

One of the parameters that determines the quality of organic substances, etc. is the hue when they are melted.

In order to detect this hue, light of a predetermined wavelength is transmitted through the melt in the liquid tank from the light source section provided on the right side of the figure toward the detection section on the left side.

This light is supplied from the lamp 12 which receives constant power from the light source control panel 22 and emits light.

The optical system 13 consists of a lens, a dichroic filter, etc., and divides the light generated by the lamp 12 into light with a wavelength λ (for example, 680 nm) that is hardly absorbed by the melt, and light with a wavelength λ2 (for example, 680 nm) that is strongly absorbed by this. , 420 nm
) into parallel rays of light.

This parallel light beam passes through the glass stopper 1O and the glass plate 16, advances into the liquid tank section, further passes through the glass plate 17 and the glass stopper 11, and enters the detection section.

The light of wavelength λ1 included in this light is reflected by the dichroic mirror 18 that reflects only the light of that wavelength, and enters the photoelectric conversion element 20, and the light of wavelength λ, reflects only the light of that wavelength. It is reflected by the dichroic mirror 19, enters the photoelectric conversion element 21, and is converted into an electric signal corresponding to the intensity of the incident light, and these output signals are sent to an electric circuit inside the detector and compared.
The L/bevel of the melting color is determined by the result of step (b).

t, '7: In the melt color measuring device (') according to the present invention, the melt color of the melt to be measured is at a high temperature of around 2 ()0 degrees, so first, the melt color to be measured is the melt itself. In order to prevent the light source section and the detection section from being cooled, a liquid tank section (J-Sumashket) is provided, and in
In order to prevent the light source section and the detection section from getting too hot and impairing their functions, heat insulating plates 6 and 1 are provided adjacent to the light source section and detection section mounting flanges IC and 1d of the liquid tank section. , and between the outer casing 2 of the light source section and the outer casing 3 of the detection section.

As for the material of the heat insulating plates 6 and 7, ceramics or oxidized metal sintered bodies are recommended, but stainless steel or the like can also be used.

In addition, the cooling plates 8HI and 9 are provided with cooling water passages 8a and 9a to allow cooling water to flow through them (in addition, supply pipe connection holes 8b and 9b and recovery pipe connection holes are provided to supply cooling water thereto). Holes 8c and 9c are provided.

Therefore, the reason for using a heat insulating plate and a cooling unit in conjunction with ν is that if the heat insulating plate alone is used to provide sufficient insulation. 2. Also, look at the cooling plate []
If the target is achieved, a large amount of heat will be taken away from the molten material, causing inconvenience.

〔Effect of the invention〕

Therefore, if you configure it as shown in ``-1'', it will be extremely difficult to configure ゛round':1
It can be constructed in a compact manner, and the molten color can be automatically measured and recorded on-line at all times without causing any inconvenience due to cooling of the molten material.
If the present invention is implemented, it will have a great effect in the manufacturing industry of organic substances, etc.

[Brief explanation of drawings]

The drawing is a sectional view showing the main part configuration of the fused color measuring device according to the present invention. 1 -1----Liquid tank outer casing 2--1 Light source section outer casing 3...-111 Detection section outer casing 4-m-----For light source section Control panel outer casing 6, 7 8, 9 ・0.11 4. 6. 8. 20, 24.25 Converter outer casing heat insulation plate for detection unit Cooling plate Transparent glass stopper Lamp optical system Heat-resistant glass plate fixing fittings Heat-resistant glass plate Dichroic mirror Photoelectric conversion element Light source unit Control panel Detection unit Circuit board inspection

Claims (1)

[Claims] A light source unit that generates parallel light beams containing light of at least two different wavelengths; a molten substance such as an organic substance whose melt color is to be measured flows through the light source unit; and the parallel light beams pass through the inside of the molten substance. In an apparatus for measuring the melt color of organic substances, etc., which consists of a liquid tank part and a detection part that spectrally spectra the light transmitted through the melt in the liquid tank part and compare the spectral intensities, there is a Along with providing a steam jacket,
A heat insulating plate made of a heat insulating material and provided adjacent to the liquid tank and having a transmission window for light transmitted through the liquid tank between the light source part and the liquid tank part and between the liquid tank part and the detection part, respectively; A cooling plate that is provided between the heat insulating board and the light source section and the detection section, and has a flow path through which cooling water flows inside, and has a light transmitting window at a position corresponding to the light transmitting window of the heat insulating board. and furthermore,
The above-mentioned fused color measuring device, wherein the outer casings of the light source section and the detection section are each provided with a cooling air supply path leading to the inside thereof.