On-line detection device for optical brix

Abstract

The invention provides an on-line detection device for optical brix. The bottom and the top of a prism of a brix detector are rectangular and are parallel to each other; and the bottom surface of the prism of the brix detector is in contact with a detected medium by a sampling hole of a shell. The front and back side surfaces of the prism are antiparallelogram-shaped and are parallel to each other, and the left and right side surfaces of the prism are rectangular; and the crossed angle between each of the left and right side surfaces and the bottom surface is 60-70 degrees. An incident light beam is vertical to the top surface of the prism and is reflected by sampling surfaces of one side surface and the bottom surface; the returned light beam is reflected by the other side surface to fall down on an optical imaging sensor; and an obtained electric signal passes through a signal and calculation circuit board and outputs a current brix value of a detected medium. A temperature sensor is arranged and is used for carrying out real-time temperature compensation. A prism positioning plate, an optical path positioning plate and a positioning pressing plate are used for fixing the prism, a light source and a collecting lens. A washing facility is composed of a high-pressure hot steam generator and a steam pipeline. The prism with a trapezoid section has the small light signal loss; the size of the detector is reduced so that the detector is suitable for being mounted online; and the high-pressure and high-heat steam is used for washing so that scales are prevented, the measurement precision is guaranteed, and the shell is sealed so that the on-line detection device can work for a long period in a severe environment.

Description

technical field [0001] The invention relates to a Brix degree detection device, in particular to an optical Brix degree on-line detection device suitable for detecting mixed sugar juice and syrup in a sugar factory. Background technique [0002] Brix refers to the percentage of the weight of soluble substances contained in the solution to the total weight. In the sugar making process, the Brix value of the syrup mother liquor in the sugar cane pressing juice (beet oozing juice) to the boiling sugar is a very important control index. [0003] In the production process of the sugar factory, the control of the Brix value of the sugar juice at each stage can directly affect the production energy consumption and the quality of white sugar. For example, several important processes in the production process, such as adding osmotic water to squeezed juice, heating and evaporating clarified juice, sugar liquid in boiling sugar (commonly known as mother liquor) and dilution of sugar ...

AI Technical Summary

Problems solved by technology

In addition, the volume of the specific gravity detection device is relatively large, and the weight of the fouling continues to increase, and the weight percentage of the fouling also directly affects the measurement accuracy

The refractometers that have appeared in recent years have high precision, fast measurement, and easy installation, but there is also the problem that the detection prism is prone to fouling, and fouling may reduce the accuracy to 1%.

Although equipped with hot water flushing facilities for the detection prism, it is still affected by fouling when used online, which reduces the accuracy

In addition, the existing refractometers mostly use triangular prisms, because the light from the light source is incident from one side of the prism, and the optical imaging sensor needs to obtain the refracted return light from the other side, so the whole device is bulky, which is not conducive to on-site installation

[0005] In short, due to the defects of the existing Brix measurement device, it is impossible to obtain real-time Brix data of each process in the sugar factory, and it is also impossible to implement automatic control of each process. The accurate Brix online detection device has become the automation of sugar production. key

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