Combustion furnace for total organic carbon (TOC) water quality automatic analyzer

Abstract

The invention discloses a combustion furnace for a total organic carbon water quality automatic analyzer, which comprises a glass component, a heating coil, a temperature sensor, a sample outlet, a gas outlet, a protective tube, a catalyst, a combustion furnace shell and heat-preservation cotton. The working process of the combustion furnace is that: a sample enters and reaches the bottom of the glass component from the sample inlet; the catalyst is arranged at the bottom of the glass component; the heating coil heats the sample to 900 DEG C under the catalysis of the catalyst; organic matters in the sample are combusted to generate carbon dioxide which is exhausted from the gas outlet to enter the next stage of the total organic carbon analyzer for treatment; the heat-preservation cottonis arranged between the protective tube and the combustion furnace; temperature measurement points of the temperature sensor are arranged on the outer wall of the protective tube, and are close to the heating coil to measure combustion temperature; and temperature signals obtained by the measurement are transmitted to a controller of the total organic carbon water quality automatic analyzer for processing and control. The combustion furnace solves the problem of difficulty in control over the water sample in combustion.

Description

technical field [0001] The invention relates to the technical field of total organic carbon water quality monitoring, and more specifically relates to a combustion furnace for an automatic water quality analyzer of total organic carbon. Background technique [0002] Total organic carbon (TOC) water quality automatic analyzer can be divided into combustion oxidation-non-dispersive infrared absorption method, conductivity method, gas chromatography and so on according to different working principles. Among them, the combustion oxidation-non-dispersive infrared absorption method only needs one-time conversion, the process is simple, and the sensitivity is high. Therefore, this TOC analyzer is widely used at home and abroad. Can be divided into subtraction method and direct method. No matter which method needs to burn the water sample, the combustion furnace is the core component. The water sample should be heated and burned at 900 degrees Celsius. The design of the combustion ...

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Problems solved by technology

[0003] In the prior art, there is a method and equipment for directly burning trace organic matter in water, and a technology for directly burning organic matter in waste water and converting it into inorganic matter is to put conventional organic samples into a high-temperature quartz tube at 900-1000 degrees Celsius Combustion, mainly burns organic samples, but when measuring the total organic carbon in water, the main component of the burned sample is water, which is the substance that extinguishes the combustion. The above methods and equipment are difficult to achieve complete combustion, so the existing technology has been improved. : (1) Extend the combustion quartz tube with a length of 350mm, and set the 300mm high temperature combustion zone, and the remaining 350mm long quartz tube is set as the low temperature gasification zone; (2) The sample injector is not placed in the high temperature zone but placed in the low temperature (3) The sampler is heated at a lower temperature in the low-temperature gasification zone. The quartz sampler is changed to a glass sampler, and the quartz capillary containing the water sample is changed to a glass capillary ball. When the water sample is heated and vaporized , so that the gasified molecules collide in the inner space of the sphere, and the molecules with high energy rush out of the capillary and slip to the high-temperature zone for combustion. Various molecules rush out of the capillary one after another according to their respective energy levels, and are fully burned in the high-temperature zone one after another.

[0004] The improved existing technology divides the quartz tube into a high-temperature combustion zone and a low-temperature gasification zone. The structure of the quartz tube is complicated. Due to the existence of high and low temperature, and no temperature detection equipment, it is not easy to control the combustion.

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