The phenomenon of spontaneous combustion of coal seams may sound amazing, but in fact it is a very common phenomenon.

Currently, about 3% of the total global carbon dioxide emissions come from coal seams. You can imagine that this proportion is so high.

In a coal country like China, the phenomenon of spontaneous combustion of coal seams is naturally very serious. According to relevant data, the coal burned out of China due to spontaneous combustion of coal seams every year is estimated to be between 20 million and 200 million tons.

This number is very terrifying and astonishing. Compared with coal-fired power generation in thermal power stations, the spontaneous combustion of coal seams produces more pollutants and is more dangerous.

Because the process of spontaneous combustion of coal seams is often accompanied by incomplete combustion and harmful substances cannot be controlled.

Although coal seams are spontaneously ignited and burning 200 million tons per year is a bit exaggerated, there are definitely tens of millions of tons per year.

After all, the Rujigou Coal Mine in Helan Mountain alone burns millions of tons of coal every year, and the coal mine of Rujigou Coal Mine is high-quality anthracite, with a price of about 1,000 yuan per ton.

In other words, the Rujigou Coal Mine burns more than one billion yuan of coal every year, which not only pollutes the environment, but also suffers from extreme losses.

There are more than 70 similar coal seam spontaneous combustion mining areas across the country. Even if the spontaneous combustion scale is large and small, it is not groundless to burn tens of millions of tons every year.

The burned coal may produce more pollutants and carbon dioxide than the emissions of 300 million cars a year.

As night fell, in the temporary camp of the scientific research team, looking at the extinguished spontaneous coal seam, everyone did not relax their vigilance.

Because there is more than this spontaneous combustion area in Rujigou Coal Mine.

The Rujigou Mine Area is the main concentrated area for the spontaneous combustion of the Helan Mountain Nature Reserve and the peripheral coal seam. The mining area involves 6 coal mines, and the spontaneous combustion of the coal seam has been more than 300 years.

The "Taixi anthracite" produced in the mining area has a proven reserve of 580 million tons, and there are currently about 270 million tons left, of which the resource reserves affected by the fire area are more than 67 million tons.

What's even more troublesome is that since coal seams are often interconnected, and the mines left over from historical mining have increased the oxygen input to underground coal seams. If all the spontaneous ignition points in the mine are not extinguished in time, the spontaneous ignition of the coal seams will soon make a comeback.

Li Mingsheng and Liu Xin sat in front of the simple tent, using the lights of the lights to discuss how to solve the remaining fire area.

Li Mingsheng, who held the mining area exploration map, asked a very critical question: "Researcher Liu, do this flame retardant crystal have any side effects?"

This problem is indeed important. If there are serious side effects in flame retardant crystals, the mining area needs to weigh the pros and cons.

Liu Xin explained with a smile: "Don't worry, the flame retardant crystal does not exist permanently. In the environment of underground coal seams, it can last for about 5 to 8 months, and finally it is completely dissolved into sodium chloride and silica, nitrogen, at most it is the salt damage of sodium chloride, which can be removed through salt washing technology."

"Salt damage? This is easy to solve." Li Mingsheng found that this technology is good. Salt damage is indeed not a difficult problem for the moment, at least it is easier to solve than the difficult-to-extinguish ground fire.

He then asked about the cost of dealing with fire extinguishing.

Liu Xin just gave a rough number: "This problem requires the head office to give an instruction. It is estimated that the fire area per square kilometer will be about two or three million!"

Two or three million? Guoneng Ningmei Group is absolutely willing to accept this price, even if it doubles at that time, it is not impossible.

The spontaneous combustion zone in the entire Rujigou mining area is about 3 to 4 square kilometers. In the face of a loss of more than one billion yuan per year, tens of millions are used to extinguish the stop loss. Why not do it?

The two of them discussed for a long time and reported to the company's management in various ways.

Li Mingsheng hopes that Ningmei Group will pay attention and reach an agreement with Suiren Company as soon as possible to extinguish the fire area in the Rujigou mining area.

While reporting the experimental results, Liu Xin also hopes that the commercial evaluation office will provide a suitable charging standard to facilitate the subsequent promotion.

In fact, the Industry Department of Suiren Company has conducted relevant commercial evaluations on this technology and set up a complete set of charging standards.

Based on the environment, area, volume, and type of coal in the coal seam, a general charging standard can be obtained after comprehensive evaluation.

The next day, the sun just rose.

Liu Xin received an email with a charging standard. He roughly estimated the actual situation of the Rujigou mining area. According to the overall processing, it would cost about 18 million yuan.

Li Mingsheng, who brought breakfast, and the management teams of several mining areas, immediately reported to the Ningmei Group headquarters after obtaining the charging standards.

And Liu Xin's related work has not yet ended.

Once they released the small airship again, they conducted an infrared detection of the spontaneous coal seam of the small ravine to see if there was any rekind.

The female researcher in charge of the data reported the infrared detection results to Liu Xin: "Brother Liu, the temperature is currently maintained at 33 to 37 degrees Celsius, but the temperature in the edge area on the north side has increased significantly, and it is currently around 57 to 62 degrees Celsius."

"North side edge?" Liu Xin turned around and looked at the exploration map of the mining area, and soon discovered possible problems.

Because on the north side of the small hill fire area, about 1.7 kilometers away is another spontaneous coal seam.

Soon another researcher came over with a coalbed methane gas test report, which showed that the gas concentration in the coal seam in the small valley was gradually rising.

Liu Xin saw the problem: "It seems that the situation is very obvious. There is a connection between the small hill fire area and another fire area on the north side. The fire area on the north side must be extinguished as soon as possible, otherwise it will rekindle in less than half a year."

"Brother Liu, the flame retardant we carry can also extinguish about two square kilometers. With the fire area of ​​the Rujigou mining area, at least twice the flame retardant needs to be applied for." Gao Shan immediately suggested.

"I see."

Liu Xin opened his notebook, edited an email, and sent it to the Lu Provincial Branch. The coal seam spontaneous combustion laboratory is located in Weifang, Shandong Province, and the production of flame retardant is also under the Lu Provincial Branch of Suiren Materials.

After ordering a batch of flame retardants, Liu Xin left the team in half and left part of it to observe and monitor the coal seams of the small hills.

Another part of the personnel, led by him, went to the Yangshugou coal seam on the north side to prepare for exploration and drilling.

Under the leadership of Li Mingsheng, they bypassed two small hills and came to Yangshugou Fire District. Seeing the mountains of coal gangue piled up around, Liu Xin frowned:

"Minister Li, this place is not good!"

Li Mingsheng knew what Liu Xin meant. These mountainous coal gangues were also very dangerous risk areas because coal gangues would also spontaneously ignite.

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He replied awkwardly: "The company is trying to figure out a solution recently, but it's just not able to deal with it for a while."

"Solve these coal gangues as soon as possible! Stacking them here is not a solution. They not only contain the risk of spontaneous combustion, but also waste resources."

After saying that, Liu Xin ordered Gao Shan to prepare for infrared detection.

Controlling spontaneous combustion of coal seams has always been a difficult problem for major domestic coal groups.

Solving this problem is equivalent to directly reducing air pollution emissions by 3% across the country, which is more obvious and significant than upgrading and renovating thermal power stations.
Chapter completed!