Increased carbon dioxide brings hazardous gas detectors to help out

[ Focus on Chemical Machinery and Equipment Network ] Due to the blockade policies implemented by various governments during the new crown pneumonia pandemic, global carbon dioxide emissions will drop sharply in 2020
.
The "2021 Global Carbon Budget" recently released by the Global Carbon Project shows that due to the government's lockdown policy during the new crown pneumonia pandemic, global carbon dioxide emissions have fallen by 5.
4% in 2020
.

 

However, recently at the 26th Conference of the Parties (COP 26) of the United Nations Framework Convention on Climate Change held in Glasgow, UK, a report submitted by a research team pointed out that global fossil fuel carbon dioxide emissions may increase by 4.
9% in 2021.
Reached 36.
4 billion tons, which brought emissions almost back to the level before the 2019 epidemic
.
The report pointed out that the substantial increase in the use of coal and natural gas is the main reason for the increase in carbon emissions this year
.
The researcher said that the rebound in emissions has exceeded past expectations.
Last year, the epidemic reduced global carbon dioxide emissions by 1.
9 billion tons, while reaching the target of 1.
5°C (referring to the global average temperature rising by 2100 than before the industrial revolution Within 1.
5°C), 1.
4 billion tons of emissions must be reduced annually in the future
.

 

　　As more carbon dioxide (CO2) is absorbed, the acidification of the Arctic Ocean is expected to become more severe
.
This may lead to "broken links" in the food chain of hard-shelled marine animals, such as mussels and "sea butterflies"
.
Sea water absorbs excess CO2 in the atmosphere, which will trigger a series of chemical reactions
.
This will cause the pH and carbonate ion concentration of seawater to decrease
.
Moreover, the increase in carbon dioxide absorption caused by human activities will lead to a gradual decrease in certain important organisms
.

 

　　So how do we detect carbon dioxide emissions?
 

　　Carbon dioxide is a colorless, odorless, non-combustible, non-combustible gas at room temperature.
It has a higher density than air and is slightly soluble in water.
It reacts with water to form carbonic acid
.
Different carbon dioxide industrial environments require different types of gas detectors
.

 

　　1.
Portable gas detector:
 

　　Because the portable instrument is easy to operate and small in size, it can be carried to different production sites.
The electrochemical detector is powered by alkaline batteries and can be used continuously for 1,000 hours
.
Infrared sensors, new LEL detectors, PID and hybrid instruments use rechargeable batteries (some have adopted memoryless nickel-metal hydride or lithium ion batteries), so that they can generally work continuously for nearly 12 hours.
Various factories and health departments are more and more widely used
.

 

　　2.
Fixed gas detector:
 

　　This is a detector that is used more in industrial equipment and in the production process
.
It can be installed at a specific detection point to detect specific gas leaks
.
The fixed detector is generally a two-body type.
The detection head composed of sensor and transmitter is installed in the detection site as a whole, and the secondary instrument composed of circuit, power supply and display alarm device is installed in a safe place for easy monitoring
.

 

　　Its detection principle is the same as that described in the previous section, but it is more suitable for the continuous, long-term stability and other characteristics required by fixed detection in terms of process and technology
.
They should also be selected according to the type and concentration of the gas on site, and at the same time, they should be installed at the most likely leaking part of the specific gas.
For example, the most effective height of the sensor should be selected according to the specific gravity of the gas
.

 

　　Source: Aiyi Technology, Global Science
 

　　Original title: Increasing carbon dioxide brings hazardous gas detectors to help out