Simple dynamic sulfur dioxide gas toxicant exposure experimental device

Abstract

The invention provides a simple dynamic sulfur dioxide gas toxicant exposure experimental device. The device consists of a gas decompression dosing device, a dynamic gas toxicant exposure cabinet/chamber and a waste gas absorption and discharge device, wherein the gas decompression dosing device has functions of directly decompressing and quantifying high-purity sulfur dioxide gas, thus omitting assembly of a special decompression gauge and a flow gauge and realizing quantitative control on toxic gas in advance; the dynamic gas exposure cabinet/chamber ensures that a simulated toxicant exposure environment is closer to a natural exposure environment and concentration of the toxic gas is uniform and accurate and can be regulated and controlled in real time; and the discharged gas meets thesafe discharge standard through the waste gas absorption and discharge device. The overall device has the advantages that operation method is simple, the manufacturing expense is low, and the continuous long-time toxicant exposure can be realized, thus solving the difficulty of continuous dynamic toxic gas exposure for a large number of animals, and realizing sulfur dioxide fumigation for variousfood and industrial materials and the like.

Description

technical field [0001] This application relates to the field of agricultural and biomedical poisoning equipment, in particular to a dynamic poisoning experimental device for toxic gases such as sulfur dioxide. Background technique [0002] Atmospheric SO 2 Pollution is one of the major environmental problems facing the world. my country, as a large coal-consuming country, suffers from more serious sulfur dioxide pollution. Despite the country's strong "energy saving and emission reduction" measures, SO 2 Emissions have declined since 2008, but SO in the environment 2 The total amount is still more than 20 million tons, ranking first in the world. According to World Bank estimates, 600 million people in China live in an environment where sulfur dioxide exceeds the World Health Organization standard. Living in this environment for a long time will have adverse effects on the health of the population. According to the survey, China has 350,000 outpatient respiratory cases ...

AI Technical Summary

Problems solved by technology

But thanks to SO 2 It is an irritating and corrosive toxic gas. On the one hand, the same type of dynamic inhalation poisoning devices at home and abroad are relatively complicated, and most of them are imported. The cost is high and the operation is complicated. It is difficult to meet the requirements of toxicology experiments in most scientific research institutes and schools. need

On the other hand, this kind of poisoning equipment is easily corroded by sulfur dioxide and the acid solution formed, especially when doing a large number of live animal experiments, affected by factors such as the respiratory conditions of the experimental animals and the environment of the poisoning room, the concentration of poisoning in the box is often is constantly changing, the SO specified by the national standard 2 The determination method is relatively laborious and time-consuming, and it is difficult to adjust in time

At the same time, sulfur dioxide gas is easy to leak during the poisoning process, which will damage the health of operators and pollute the surrounding environment.

Images