What are the pros and cons of coal for people? 30

Pros: 1Combustion exothermic, providing a lot of energy in industrial production, industrial production is inseparable from it.

2.heating, boiling water, etc., in terms of life.

3.Now the world's most basic source of energy supply.

Cons: 1Combustion, releasing a large amount of carbon dioxide and toner, etc., accumulates a lot, causing serious pollution to the atmosphere (let's say now, smog in Beijing and Harbin).

2.Now that the coal mine is basically hollowed out, there is an extreme shortage of energy, and it will not be long before it is used.

3.Coal mine accidents are not less every year. High-risk work.

Again, there is some truth to what was said upstairs.

Profit 1: Promote the economic development of remote areas. These remote areas are generally dominated by agriculture, and there is a coal mining industry, which drives the development of local industries.

Profit 3: Attract a large number of foreign high-level technical talents to the local area, improve the quality of the local population, and increase the local cultural atmosphere.

Profit 4: The tax contribution of the coal mining industry to the local economy guarantees the promotion and improvement of local residents' medical care, education, municipal construction and other benefits.

Disadvantage 1: Coal mining destroys the underground structure, causing a series of environmental problems such as surface subsidence and groundwater loss.

Disadvantage 2: Coal combustion provides electricity, but carbon dioxide and sulfur dioxide produced by coal combustion pollute the air.

Disadvantage 3: The coal mining industry needs a large amount of labor to support, so occupational diseases such as silicosis among coal miners are also a great threat to human health.

Summary. Coal is a kind of heating energy, it will make us feel warm in winter, and it can also boil water, such as coal in the warm baby.

What are the effects of coal on our lives?

Coal is a kind of heating energy, it will make us feel warm in winter, and it can also boil water, such as coal in the warm baby.

Good effects: power generation, heat generation, various coal chemical extraction and secondary processing into daily necessities, such as dyes, fertilizers, pesticides, detergents, solvents, etc. Bad effects: surface subsidence, mining disasters, sulfide production from combustion, and poor stability of the country's energy structure.

Can you tell us more about that?

Occurrence and determination of carbon, hydrogen, nitrogen and oxygen in coal.

Coal is made up of organic and inorganic matter.

It consists of two parts. Inorganics are mainly minerals and water; Organic matter is mainly composed of elements such as carbon, hydrogen, oxygen, nitrogen, sulfur, etc. The sum of carbon, hydrogen and oxygen accounts for more than 95% of organic matter. The range of nitrogen content is not large, generally between.

The occurrence forms of various elements in coal are not consistent. Carbon, hydrogen and oxygen in coal mainly exist in aromatic structure, aliphatic structure and aliphatic cyclic structure. A small amount of carbon in carbonate carbon dioxide.

In the form of existence, a small amount of hydrogen and oxygen exist in the form of crystalline water. Nitrogen in coal, mainly from the combustion of proteins converted from coal-forming plants, is usually organic nitrogen, some of which are heterocyclic. in peat and lignite.

In addition, protein nitrogen (various amino acids.

and its derivatives).

Because the inorganic components of coal also contain a small amount of carbon, hydrogen, oxygen, sulfur and other elements, when understanding the elemental composition of organic matter in coal and classifying coal, it should be determined by heavy liquid (density or washed clean coal.

The technological use of coal is mainly determined by the nature of the organic matter in the coal. Therefore, it is necessary to understand the composition of organic matter in coal.

In the power industry, the elemental composition of coal can be used to calculate the heat of combustion of coal.

Theoretical combustion temperature and composition and thermal equilibrium of combustion products.

Estimation of low-temperature dry distillate products and lignite wax yields of coal.

Carbon, hydrogen and oxygen are the main components of organic matter in coal, reflecting the degree of metamorphism of coal. The carbon content in coal increases with the deepening of the coalification degree of coal, so the coalification degree of coal is often called the metamorphic degree of coal, the hydrogen content in coal decreases slowly with the deepening of the coalification degree of coal, and the oxygen content in coal also decreases significantly with the deepening of the coalification degree of coal. Therefore, the elemental composition of coal has long been regarded as one of the indicators of scientific classification of coal.

For example, in China's national coal classification standard GB5751, dry ash-free hydrogen (HDAF) is used as an index to classify anthracite sub-categories.

Carbon neutrality refers to the calculation of the total amount of greenhouse gas emissions directly or indirectly generated by enterprises, groups or individuals within a certain period of time, and offsetting their own carbon dioxide emissions through afforestation, energy conservation and emission reduction, etc., to achieve "zero emissions" of carbon dioxide. Carbon peaking refers to a stage of steady decline after carbon emissions enter a plateau. Put simply, it means "breaking even" with CO2 emissions.

The carbon neutrality policy will promote the improvement of coal utilization efficiency + low-carbon production, of which the coal chemical industry is expected to accelerate its development.

On the one hand, burning one ton of coal (standard coal) can produce about one ton of carbon emissions, according to China's coal consumption of 100 million tons of standard coal, the corresponding carbon emissions are 100 million tons, which means that China's carbon emissions mainly come from coal burning. To achieve carbon neutrality, carbon emissions from coal consumption must be reduced.

However, on the other hand, China's coal resources are abundant, and from the perspective of energy security, it will still play an important role in China's energy transition, and the probability of a sharp decline in demand in the short term is low.

In the case of stable demand, carbon neutrality is expected to have an impact on the coal industry in three ways:

First, the improvement of coal utilization efficiency is expected to save coal consumption. China's coal (about 52%) is mainly used for power generation, but the current average utilization efficiency of domestic coal power is only 35%. The low efficiency is mainly due to the fact that 56% of China's coal power still comes from subcritical power plants with low efficiency, while supercritical (efficiency 38%) and ultra-supercritical (efficiency 45%) power plants with higher efficiency account for relatively low coal power, respectively.

By improving the efficiency of coal utilization in power plants, the amount of coal used can be reduced and carbon emission reduction can be directly achieved. If the average utilization efficiency of coal in 2030 is 50%, it can save 800 million tons of standard coal (accounting for about 29% of the current consumption) and reduce carbon emissions by about 100 million tons.

Second, the pressure of low-carbon production has prompted the industry's production capacity to stabilize. Carbon emissions in coal mining are mainly due to the direct emissions from mining equipment and the emissions of coalbed methane during the mining process. Coal companies need to reduce emissions by reducing high-carbon energy sources, increasing clean energy, and developing carbon-reducing technologies.

Therefore, carbon neutrality will bring certain cost pressure to coal companies, or lead to a slowdown in new production capacity, and the coal industry's production capacity is expected to remain stable in the future.

Third, the coal chemical industry is expected to accelerate its development. Coal chemical industry refers to the production method of using coal as raw material to produce chemical products, and about 7% of China's coal is used in coal chemical industry. Since the coal-to-chemicals route causes some of the carbon to enter the product, it naturally has the ability to reduce carbon emissions.

Therefore, the establishment of a low-carbon, recycling, clean and efficient coal chemical industry is expected to continue to increase the proportion of coal chemical industry in coal consumption and drive the low-carbon development of the coal industry.

Produced by Golden Ten Data, dehydrated**.

How is coal formed? Coal was first formed in the Carboniferous period of the Paleozoic Era, about 300 million years ago, when a large number of plants were buried in the ground and formed after tens of millions of years of geological processes.

The history of coal mining.

China's coal mining and utilization has a history of thousands of years, and it is one of the earliest countries in the world to discover and utilize coal. As far back as the Spring and Autumn Period and the Warring States Period around 500 BC, coal had become an important product called Shini or Nirvana. Song Yingxing's book "Heavenly Creations" in the Ming Dynasty systematically recorded the mining technology of ancient coal in China.

Current situation of coal production in China:

In 2011, it produced 3.5 billion tons of coal, and nearly 4 billion tons in 12 years.

Let's take a look at the current situation of China's energy consumption structure: China's fossil energy is as high as 92%, of which 70% is coal, 18% is oil, and 4% is natural gas; Others, including hydropower, nuclear power, wind energy, solar energy, etc., are only 8% in total. Moreover, it is unlikely that this structural ratio will change fundamentally in the near future.

Therefore, 70% of our livelihood security comes from coal.

Coal mines are always threatened by five major natural disasters, including roof, water, fire, gas, and coal dust. Therefore, we must always be careful when going down the mine, and everything must be done step by step, according to rules and regulations, and according to operating procedures, otherwise there may be problems. The complex environment of the coal mine puts the miners at constant risk.

Not even a beggar. A miner's wife looked at her husband who came out of the mine and said with distress in her eyes.

The safety problem of coal mines in China has always been very prominent. Since the founding of the People's Republic of China, there have been 25 major accidents involving more than 100 people, resulting in 3,779 deaths. In 2011, there were 1,201 accidents and 1,973 deaths in coal mines across the country.

Coal combustion produces carbon dioxide, carbon monoxide, hydrogen sulfide and other harmful gases, pollutes the environment, and causes the greenhouse effect.

Coal has helped mankind to advance by leaps and bounds in the history of human social development, led the second world industrial revolution, and is still the most important basic energy source.

However, coal combustion produces carbon dioxide, carbon monoxide, hydrogen sulfide and other harmful gases, polluting the environment and causing the greenhouse effect.