Exhaust gas treatment system for food heavy metal detection

Abstract

The invention discloses a waste gas treatment system for detecting heavy metals in food. The system comprises a waste gas cavity, wherein an adsorption chamber is formed in the upper part of the waste gas cavity, the bottom of the waste gas cavity is connected with a reaction ball chamber, a plurality of calcium oxide adsorption layers are arranged in the adsorption chamber, each calcium oxide adsorption layer comprises a fiber skeleton and calcium oxide applied to the fiber skeleton, and the fiber skeletons are wound into a spiral line structure by a fiber bundle; a conical chamber is formed in the lower part of the waste gas cavity, and the bottom tip end of the conical chamber is in sealed communication with the reaction ball chamber; the system further comprises an air circulation device which comprises a pipe, one end of the pipe is communicated with the upper part of the adsorption chamber, the other end extends into the reaction ball chamber, an air pump is arranged on the pipe, and the pipe is further connected with a first branch pipe and a second branch pipe. Adsorption and digestion are performed in a closed environment in a fully sealed form, so that the waste gas cannot leak, and little harm is caused to the environment and human bodies. The reaction digestion condition can be clearly observed through the waste gas chamber and the reaction ball chamber which are made of transparent glass.

Description

technical field [0001] The invention relates to a waste gas treatment technology in a laboratory testing process, in particular to a waste gas treatment system for food heavy metal detection. Background technique [0002] The determination of heavy metal content in food needs to digest and carbonize the physically crushed food with strong acid, so that substances such as carbohydrates, proteins and fats are digested and emitted in the form of gas, and heavy metals and other substances that are not easily digested will remain. At this time Extracted by chemical means for subsequent analysis. In the prior art, food samples range from a few grams to dozens of grams. The waste gas generated after digestion with strong acid is mostly acidic and corrosive to a certain extent, which will have adverse effects on the human body and the environment. It needs to be properly handled during the digestion process. At the same time, the reaction between strong acid and food chemical compo...

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Problems solved by technology

In the prior art, food samples range from a few grams to dozens of grams. The waste gas generated after digestion with strong acid is mostly acidic and corrosive to a certain extent, which will have adverse effects on the human body and the environment. It needs to be properly handled during the digestion process. At the same time, the reaction between strong acid and food chemical components will generate a lot of heat during the digestion process, resulting in too high temperature in the reaction vessel, making it difficult for heavy metals to be extracted in the subsequent chemical extraction process, causing heavy metals to be lost in disguise, and the test results will also be affected. There are adverse effects

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