Water quality COD (chemical oxygen demand) on-line analyzer digestor

A digestion device and analyzer technology, applied in the field of digestion devices, can solve the problems of harsh use environment of the instrument, easy oxidation and corrosion of heating wires, long digestion time, etc., and achieves high microwave heating efficiency, good digestion consistency, and short digestion time. Effect

Inactive Publication Date: 2013-08-21
NANJING NORMAL UNIVERSITY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The above COD on-line automatic monitor digestion device uses heating wires for heating, and the main problems of using heating wires for heating and digestion are as follows: (1) The operating environment of the instrument is generally harsh and highly corrosive, which makes the heating wires particularly prone to oxidation and corrosion, and the failure rate high
(2) Uneven heating, resulting in inconsistent digestion
(3) It is easy to cause scaling on the pipe wall of the digestion tank, which is not easy to clean
(4) Long digestion time

Method used

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Embodiment Construction

[0021] In order to further explain the technical means and functions adopted by the present invention to achieve the intended purpose of the invention, the specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0022] Such as figure 2 The water quality COD online analyzer digestion device shown includes a first solenoid valve 1, a second solenoid valve 4, a temperature sensor 2, a microwave radiator 3, a quartz digestion tube 5, a housing 6 and a microwave shielding cover 7, and the first solenoid valve 1 is arranged at the lower end of the outer shell 6, and the second solenoid valve 4 is symmetrically arranged at the upper end of the outer shell 6. The inner shell 6 is provided with a quartz digestion tube 5, and the temperature sensor 2 is arranged on the quartz digestion tube 5. A microwave radiator 3 is arranged outside the digestion tube 5 and inside the housing 6, and...

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Abstract

The invention discloses a water quality COD (chemical oxygen demand) on-line analyzer digestor which comprises a first electromagnetic valve, a second electromagnetic valve, a temperature sensor, a digestion tube and a shell, wherein the shell is internally provided with the digestion tube; the digestion tube is provided with the temperature sensor; two ends of the digestion tube are respectively connected with the first electromagnetic valve and the second electromagnetic valve; the first electromagnetic valve is arranged on the lower end outside the shell; the second electromagnetic valve is arranged on the upper end outside the shell; and a micro wave radiator is arranged outside the digestion tube and inside the shell. The water quality COD on-line analyzer digestor provided by the invention is heated up by adopting micro waves, can prevent failure caused by oxidation and corrosion of heating wires, is heated uniformly with high heating efficiency, and has good digestion consistence.

Description

technical field [0001] The invention relates to a water quality COD online analysis instrument, in particular to a digestion device for a water quality COD online analysis instrument. Background technique [0002] Chemical oxygen demand is one of the most important pollution indicators in water environment monitoring. It refers to the amount of oxidant consumed by reducing substances that are easily oxidized in the water body, and the result is converted into the amount of oxygen (in mg / L). It is a comprehensive index that characterizes the reducing substances of water body. It is an important and easy-to-obtain parameter for the research of river and industrial wastewater and the effect evaluation of sewage treatment plants. [0003] COD (COD Cr ) The detection principle of the online automatic monitor is: add a known amount of potassium dichromate solution to the water sample, and use silver salt as a catalyst in a strong acid medium. After heating and digestion, the hex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/44
Inventor 李明海苏复林军曾令春
Owner NANJING NORMAL UNIVERSITY
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