Chapter 229: Deep geothermal

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Deep geothermal is an emerging energy technology that only began to be studied in the Commonwealth around the 1970s.
The main principle is to guide the heat contained in the dense and impermeable high-temperature rock mass at a depth of 2000 to 3000 meters underground to the surface by means of drilling, water injection, etc., and use it for heating, power generation and other fields.
This technology is favored due to its low cost, clean and recyclable advantages, and has been quickly promoted and applied in many countries with rich geothermal resources. However, it is limited by the speed of technological development. This technology has not been until this century. Only then formed a more mature utilization system.
"The use of deep geothermal energy in my country started late, and it has only formed a considerable scale after the technology has matured in recent years." The person in charge seems to know a lot about this area, and when talking to Chen Xin, he is also eloquent: "The first few A new national area in Chang'an adopted this deep geothermal well as a heating method. This is a successful case of my country's deep geothermal resource utilization. Afterwards, high-temperature dry hot rocks were produced in Qinghai. my country is in the forefront of this area. "
"Did my country only begin to use deep geothermal heat in these years? But I remember when I was still in elementary school, the Yangbajing in Tibet should have been built for geothermal power generation, right? Isn't that a deep geothermal resource development?" Chen Xin was a little surprised In his impression, Yangbajing was already very famous when he was still in elementary school.
Faced with this problem, the person in charge shook his head with a smile, and then explained:
Yangbajing in Tibet is a medium-temperature shallow geothermal field. The geothermal resources there are basically readily available, and there is no need to drill deep wells. Utilization. However, the geothermal power generation in Yangbajing is indeed quite early. Megawatt-level geothermal power generation was realized in the 1990s, which is a famous case of geothermal development."
"It turns out that shallow geothermal and deep geothermal are really not the same thing." Chen Xin nodded clearly, feeling quite suddenly realized, but he went on to ask: "The high-temperature dry-hot rock produced by Qinghai, this Is the available value high? Is the country's technology mature in this regard?"
Chen Xin is very concerned about this issue. If the country has ready-made technology, then his idea of ​​building an energy tower to build a greenhouse or even a district heating field will be easier to realize.
"Haha, you can just ask the idea!" For this question, the person in charge seemed to be scratched to the itch. The whole person became excited, adjusted his sitting posture, and took a sip of wine, obviously intending to meet Chen Xin. Speak well.
Upon seeing this, Chen Xin also made a gesture of listening carefully, wanting to get a good understanding of this knowledge.
"The total amount of geothermal utilization in China has been the largest in the world for many years, but it is mainly concentrated on the utilization of shallow, medium and low temperature geothermal. On the one hand, there is a lack of relevant technology for deep geothermal resources, and on the other hand, there is insufficient resource exploration. The country made a lot of breakthroughs in this area only in the last year.
At this point, the person in charge was a little bit sorrowful, not only exclaimed:
Geothermal resources are a good thing! Its application cost is much lower than solar and wind energy. And it is clean and environmentally friendly, with huge reserves!
Especially in my country, the resources of dry hot rock at a depth of 3 to 10 kilometers in the mainland are about 856 trillion tons of standard coal, accounting for about 1/6 of the world's resources. It is a pity that my country has not studied this energy before. It was not until the discovery of hot dry rock resources on the Qinghai-Tibet Plateau that my country had not found any hot dry rock resources through exploration. "
"If this is the case, why didn't the country consider large-scale mining of hot dry rock and use deep geothermal heat to build shelters to avoid this crisis?" Chen Xin felt strange. According to the person in charge, the mining of hot dry rock resources Easy and low application cost. It stands to reason that the country should mine on a large scale. Why is it still burning coal?
Regarding this question, the person in charge smiled bitterly:
Don’t you want to be a country? The southern Qinghai-Tibet Plateau accounts for about one-fifth of the total dry-hot rock resources in mainland China. The state plans to build planting and breeding areas on the Qinghai-Tibet Plateau. The use of geothermal heat for heating and power generation, but now the construction environment on the plateau is too harsh, and the progress of this plan is very slow.
Moreover, the hot dry rock resources of Guowo are mainly distributed in the Qinghai-Tibet Plateau, Songliao Basin, Bohai Bay Basin, Southeast Coast and other places. Now in addition to the Qinghai-Tibet Plateau, the Songliao Basin, Bohai Bay Basin and the Southeast Coast are all rising. The sea level is sealed by ice. Under such circumstances, it is difficult to develop and apply deep geothermal resources on a large scale. "
Hearing what the person in charge said, Chen Xin nodded clearly. The sea water was poured into Dongting Lake, and Shandong Peninsula became Shandong Island. It is obviously impractical to develop geothermal resources in coastal areas under these circumstances. of.
Although there are many difficulties in this regard, the prospects for the use of deep geothermal energy are still broad.
Chen Xin thought about it for a while and then said: "Since the country has the technology in this area, there shouldn't be any problem if I want to use geothermal resources to build a greenhouse?
"This is really hard to say." The person in charge shook his head and filled Chen Xin's glass with wine, before continuing: "The deep geothermal technology currently applied in the country is mainly used for the development of dry hot rock. An impermeable rock formation that does not contain fluid or contains a small amount of fluid.
Specifically, it is to open up the fissures by injecting water into deep wells, UU Reading www.uukanshu. com thus forms a planar artificial dry hot rock heat storage structure, which extracts heat by recovering high temperature water and steam. This technology is required by the geological structure. In places like Hunan Province, groundwater resources are too rich. If you want to exploit deep geothermal resources, technical changes must be made. There are many problems! "
"Leave it to me to solve the technical problem. As long as I can set up the shelf, I can make it practical." Chen Xin didn't think it was a problem.
With the backing of the system, it is not difficult to exploit deep geothermal.
"I forgot that Mr. Chen, what you are best at is technical improvement!" The person in charge laughed and patted his head for fear. This was a guarantee: "Since you have such an idea, Mr. Chen, I am naturally willing to support it. .After that, I will reflect this situation with the higher-level departments, and strive to establish a pilot here. At that time, I will still need Mr. Chen to improve the technology.
If this can be done, the development technology of deep geothermal resources can be promoted on a large scale, which will benefit the country and the people! "
"Then I will wait and see!" Chen Xin raised his glass and touched the person in charge again.