What is the difference between coal and coal?

Question 1: What's the difference between coal and coal? Definition of coal science and technology terms.

English name: coal English name: coal definition 1: The remains of ancient plants are transformed into solid combustible minerals after coal formation. Discipline: coal science and technology (first-class discipline); Introduction to Coal Science and Technology (two disciplines) Definition 2: Coal mined from coal mines without washing and processing. Discipline: resource science and technology (first-class discipline); Energy science (two disciplines)

Question 2: What's the difference between coal and coal? According to the third point of Article 2 of the Notice of Finance and Tax Law 1993 on Printing and Distributing the Detailed Rules for the Implementation of the Provisional Regulations on Resource Tax in People's Republic of China (PRC):

Coal refers to raw coal, excluding coal washing, coal preparation and other coal products.

Raw coal refers to the coal that has just been mined from the mine without screening, washing and sorting, and requires resource tax. Coal washing, coal preparation and other coal products do not need to collect resource tax.

Coal includes raw coal, coal washing, coal preparation and other coal products, that is, coal includes coal (raw coal: unprocessed coal) and coal washing, coal preparation and other coal products (processed coal).

Question 3: What's the difference between coal and coal? Carbon is just a form of element. Please don't write coal as "coal char". This is a typo, a distorted Chinese character, which will make people laugh.

Question 4: What is the difference between raw coal and standard coal? standard coal

There are many kinds of energy sources, and the amount of heat they contain is different. In order to facilitate the comparison and study of the total amount, China has designated 7000 calories (29306 joules) per kilogram as standard coal, also known as standard coal. In addition, China often converts all kinds of energy into tons of standard coal. For example, 1 ton of straw is equivalent to 0.5 tons of standard coal, and 1 m3 of biogas is equivalent to 0.7 kg of standard coal.

Standard coal, also known as coal equivalent, has a unified calorific value standard. China stipulates that the calorific value per kilogram of standard coal is 7000 kcal. Different varieties and contents of energy are converted into standard coal with a calorific value of 7000 kcal per kilogram according to their different calorific values.

Energy conversion standard coal coefficient = actual calorific value of an energy source (kcal/kg) /7000 (kcal/kg)

Before all kinds of energy are converted into standard coal, the actual average calorific value of all kinds of energy is directly measured and then converted into standard coal. The average calorific value, also known as the average calorific value, refers to the weighted average of the measured calorific value of different kinds or varieties of energy. The calculation formula is:

Average calorific value (kcal/kg) = [∑ (measured low calorific value of an energy source) × energy quantity]/total energy (ton)

Reference coefficient for conversion of standard coal from various energy sources

Conversion of average low calorific value of energy name into standard coal coefficient

Raw coal 20934 kJ/kg 0.7 143 kg standard coal/kg

Clean coal 26377 kJ/kg 0.9000 kg standard coal/kg

Other coal washings 8374 kJ/kg 0.2850 kg standard coal/kg

Coke 28470kJ/kg 0.97 14kg standard coal /kg.

Crude oil 41868kj /kg1.4286kg standard coal/kg.

Fuel oil 41868kJ/kg1.4286kg standard coal/kg

Gasoline 43 124 kj/kg 1.47 14 kg standard coal/kg

Kerosene 43 124 kJ/kg 1.47 14 kg standard coal/kg

Diesel oil 42705kJ/kg1.4438+0kg standard coal/kg.

Liquefied petroleum gas 47472kj /kg1.7143kg standard coal/kg.

Refinery dry gas is 46055kJ/kg 1.55438+04kg standard coal /kg.

Natural gas is 35,588kJ/m312.143t/m3.

Coke oven gas 16746 kj/m3 5.7 14-6. 143 tons/m3.

Other gases 3.570 1 ton/10,000 cubic meters

The thermal power is 0.034 12 tons/million kilojoules.

Electricity 1.229 tons/10,000 kwh

1. The calculation method of heat is to find out the enthalpy per kilogram minus the enthalpy of feed water (or backwater) in the enthalpy-entropy diagram (table) according to the temperature and pressure of steam and hot water at the boiler outlet, and multiply it by the actual steam or hot water generated by the boiler (read by the flowmeter). If some enterprises do not have a complete steam or hot water flowmeter, such as enthalpy-entropy diagram (table), you can refer to the following methods for estimation:

(1) During the reporting period, the boiler water supply minus the sewage loss is regarded as the steam or hot water output.

(2) The enthalpy per kilogram of hot water is calculated as 20 kcal in the case of closed-loop supply and 70 kcal in the case of open-loop supply (the outlet water temperature is 90℃ and the return water temperature is 20℃).

(3) saturated steam, the pressure is 1-2.5 kg/cm2, the enthalpy above 127℃ is 620 kcal, the pressure is 3-7 kg/cm2, and the enthalpy of135℃-/65℃ is 630 kcal. The pressure is 8kg/cm2, and the temperature above 170℃ is calculated as 640kcal per kilogram of steam.

(4) Superheated steam, pressure 150kg/cm2, enthalpy per kilogram: 650kcal below 200℃, 680kcal at 220℃-260℃, 700kcal at 280℃-320℃ and 700kcal at 350℃-500℃. Convert it into joules according to 4. 1868 joules.

2. In the energy conversion coefficient of "kilocalorie" and "ton" of standard coal, the calculation unit of steam and hot water is "kilocalorie", but the calculation unit of steam (energy consumption) in the basic information table is "steamed ton", otherwise ... >>

Question 5: Is coal and charcoal the same thing? What is the difference? coal

A solid combustible organic rock is mainly transformed from plant remains by biochemical, burial and geological processes. Commonly known as coal.

Generation of coal:

Under the normal temperature and pressure of the surface, the plant residues accumulated in stagnant water are transformed from peat or sapropelic mud into peat or sapropelic mud; After peat or sapropelic mud is buried, it sinks into the deep underground due to the decline of basin basement and is transformed into lignite by diagenesis. When the temperature and pressure gradually increase, it is transformed into bituminous coal to anthracite by metamorphism. Peatization refers to the process that the remains of higher plants accumulate in swamps and are transformed into peat through biochemical changes. Sapropargization refers to the process of transforming the remains of lower organisms into sapropelic mud through biochemical changes in swamps. Asphaltene is a kind of argillaceous material rich in water and asphaltene.

Chemical composition:

The organic matter in coal is a complex macromolecular organic compound, which is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus, and the sum of carbon, hydrogen and oxygen accounts for more than 95% of the organic matter. Inorganic substances in coal also contain a small amount of carbon, hydrogen, oxygen, sulfur and other elements. Carbon is the most important component in coal, and its content increases with the deepening of coalification. The carbon content of peat is 50% ~ 60%, lignite is 60% ~ 70%, bituminous coal is 74% ~ 92% and anthracite is 90% ~ 98%. Sulfur in coal is the most harmful chemical component. When coal is burned, sulfur in it generates SO2, which corrodes metal equipment and pollutes the environment. The sulfur content in coal can be divided into five grades: high sulfur coal, more than 4%; 2.5% ~ 4% of high sulfur coal; Medium sulfur coal,1.5% ~ 2.5%; Low sulfur coal,1.0% ~1.5%; Ultra-low sulfur coal, less than or equal to 1%. Sulfur in coal can be divided into organic sulfur and inorganic sulfur.

Use:

Coal is an important energy source and an important raw material for metallurgical and chemical industries. Mainly used for combustion, coking, gasification, low-temperature dry distillation, hydro-liquefaction, etc. (1) combustion. Coal is an important energy source for human beings, and any coal can be used as industrial and civil fuel. ② Coking. When coal is heated in a dry distillation furnace isolated from the air, the organic matter in coal gradually decomposes with the increase of temperature, in which volatile substances escape into coke oven gas and coal tar in gaseous or vapor state, and the nonvolatile solid residue is coke. Coke oven gas is a kind of fuel and an important chemical raw material. Coal tar can be used to produce fertilizers, pesticides, synthetic fibers, synthetic rubber, paints, dyes, medicines, explosives and so on. Coke is mainly used in blast furnace ironmaking and casting, and can also be used to make nitrogen fertilizer and calcium carbide. Calcium carbide is a synthetic chemical product such as plastic, synthetic fiber and synthetic rubber. ③ Gasification. Gasification refers to the conversion into gas that can be used as industrial or civil fuel and chemical synthesis raw materials. ④ Low temperature dry distillation. Low temperature tar and low temperature coke oven gas can be produced by dry distillation of coal or oil shale at about 550℃. Low temperature tar can be used to prepare advanced liquid fuel and as chemical raw materials. ⑤ Hydroliquefaction. When coal, catalyst and heavy oil are mixed together, the organic matter in coal is destroyed at high temperature and high pressure, and reacts with hydrogen to convert into low molecular liquid and gaseous products, and further processing can obtain liquid fuels such as gasoline and diesel oil. The raw coal for hydro-liquefaction is mainly lignite, long flame coal and gas coal.

coal

A black fuel that insulates wood from the air and burns at a high temperature.

Question 6: What's the difference between coal and raw coal? The taxable scope of coal does not include coal washing and coal preparation processed from raw coal.

Question 7: What's the difference between coal and raw coal? According to the third point of Article 2 of People's Republic of China (PRC) Provisional Regulations on Resource Tax [1993] No.43, coal refers to raw coal, excluding coal washing, coal preparation and other coal products. Raw coal refers to the coal that has just been mined from the mine without screening, washing and sorting. It will levy a resource tax.