Application of Electrochemical PH3 Sensor in Tobacco Storage
Toxic gas sensor-Phosphine is a toxic and harmful gas. What is the role of electrochemical PH3 sensors in our daily lives?
My country is a big country in tobacco production and consumption. After the tobacco leaves are harvested and cured. In order to remove the green and unpleasant flavor of the tobacco leaves, improve the tobacco aroma, improve the flammability and smoking quality of the tobacco leaves. The flue-cured tobacco must be stored for aging or fermentation before it can be used to produce cigarettes.
Tobacco leaves must undergo an alcoholization process before being used in cigarettes. The alcoholization is divided into artificial alcoholization and natural alcoholization. The artificial alcoholization speed is relatively fast, but the alcoholization effect is poor. So it is rarely used at present. Natural alcoholization refers to stacking tobacco leaves in a warehouse according to certain requirements. And alcoholizing under certain temperature and humidity conditions. The aging time is generally one year, and the longest is three years. The natural aging effect is good. But there are also serious shortcomings, mainly as follows:
Because tobacco leaves are rich in nutrients and are in close contact with the external environment for a long time, tobacco leaves are prone to insects.
Toxic gas sensor-In the process of changing seasons, tobacco leaves are prone to mildew due to large changes in temperature and humidity.
As the tobacco leaves are exposed to the air for a long time, the tobacco leaves are easy to change color, harden, darken, and become oily. So the natural alcoholization time should not be too long, generally not more than three years.
Due to the above problems, natural alcoholization will also cause serious losses to tobacco leaves. It is understood that the loss after natural aging of tobacco leaves is at least 0.8%. And the direct economic loss caused by a medium-sized cigarette factory exceeds more than 20 million yuan every year. In addition. It will also seriously affect the appearance quality and internal and external quality of the tobacco leaves. And affect the quality of the deep-processed tobacco products.
At present, there are chemical control methods, physical control methods and biological control methods for tobacco pest control in my country. Phosphine fumigation is the most widely used and effective insecticidal method. The principle of the phosphine fumigation method is to slowly mix water with aluminum phosphide. And the aluminum phosphide undergoes a hydrolysis reaction to release the phosphine insecticide. Which is then transported through pipelines or naturally diffused in contact with tobacco leaves to kill pests. Phosphine insecticide also has several obvious disadvantages:
At present, the tobacco leaves have been processed into 200 kilograms of shredded tobacco before aging. The box is independently sealed, and it is difficult for the phosphine gas to fully contact the tobacco leaves through natural diffusion, and there is a problem of incomplete insecticide.
Phosphine is a highly toxic substance. After contact with tobacco leaves, the phosphine remaining in the tobacco leaves will cause certain harm to the smoker's body. In addition, long-term large-scale use of phosphine will seriously corrode equipment, pollute the warehouse and surrounding environment, and easily cause on-site operator poisoning;
Phosphine is a kind of flammable and explosive dangerous goods, which can easily cause fire. Fires caused by phosphine often occur in cigarette factories, causing serious losses to the country on many occasions. Because phosphine is highly toxic, flammable and explosive.
Therefore, we often place electrochemical PH3 sensors in the warehouse to prevent the high concentration of phosphine in the air from causing harm to the staff on site.