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Device special for measuring solution chemical oxygen demand (COD) value and use method thereof

A special equipment and solution technology, which is applied in the direction of chemical analysis by titration method, can solve the problems of low measurement accuracy, long-term guarantee, easy wear of peristaltic pump tubes, etc., and achieves improved measurement accuracy, simple structure, cheap effect

Inactive Publication Date: 2012-07-11
SHANGHAI YIDIAN SCI INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the flow rate of the peristaltic pump will fluctuate when it discharges the solution, and the peristaltic pump tube is easy to wear and the elasticity will become poor, the accuracy of its measurement is not high and cannot be guaranteed for a long time

Method used

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  • Device special for measuring solution chemical oxygen demand (COD) value and use method thereof
  • Device special for measuring solution chemical oxygen demand (COD) value and use method thereof

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] as attached figure 1 As shown, a special device for measuring the COD value of a solution, which includes a sampling unit, a digestion unit, a titration unit and a measurement unit, the digestion unit is connected to the sampling unit, the sampling unit is connected to the measurement unit, and the measurement unit is also connected to the titration unit;

[0019] The sampling unit includes a sampling plunger pump 1, a quantitative tube 2 and a multi-way valve group 3, the sampling plunger pump 1 is connected to the quantitative tube 2, and the quantitative tube 2 is connected to the multi-way valve group 3; the digestion unit includes a first A high-pressure valve 4, a second high-pressure valve 5 and a heating pipe 6, the first high-pressure valve 4 and the second high-pressure valve 5 are installed at both ends of the heating pipe 6; the measu...

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Abstract

A device special for measuring a solution chemical oxygen demand (COD) value is characterized by comprising a sampling unit, a digestion unit, a dropping unit and a measuring unit. The digestion unit is connected with the sampling unit further connected with the measuring unit, and the measuring unit is further connected with the dropping unit. The device special for measuring the solution COD value is controlled by a plunger, is high in movement precision, simultaneously has a function of automatic liquid compensation, can perform on-line automatic precision dropping, improves the measuring precision of COD, and is simple in structure and cheap in price.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a special device for measuring the COD value of a solution and a use method thereof. Background technique [0002] The so-called solution COD value is the amount of oxidant consumed when a certain strong oxidant is used to treat water samples under certain conditions. It is an index indicating the amount of reducing substances in water. The reducing substances in water include various organic substances, Nitrite, sulfide, ferrous salt, etc., but mainly organic matter. Therefore, the COD value is often used as an index to measure the content of organic substances in water. The greater the chemical oxygen demand, the more serious the pollution of the water body by organic substances. Organic matter is very harmful to industrial water systems. Water containing a large amount of organic matter will pollute ion exchange resins when passing through the desa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 殷传新金春法顾敏杰顾坚於金梅
Owner SHANGHAI YIDIAN SCI INSTR