What is CDQ? What is called coal dry stone

Dry quenching. Technical Principle:

Dry quenching is an energy-saving technology widely used in foreign countries, and its English name is Coke Dry Quenching, referred to as CDQ. CDQ technology uses cold inert gas (exhaust gas after combustion) to exchange heat with red hot red coke in a dry quenching furnace to cool red coke. The inert gas that absorbs the heat of red coke transfers the heat to the CDQ boiler to produce steam, and the cooled inert gas is then blown into the CDQ furnace by the circulating fan to cool the red coke.

The steam produced by the CDQ boiler is either fed into the in-plant steam network or sent to power generation.

Technical characteristics: H** red coke sensible heat: the sensible heat of red coke out of the furnace accounts for about 35-40% of the energy consumption of coke ovens, which is equivalent to 5% of the energy of coking coal. The use of CDQ can be **80% of the sensible heat of red coke, and the average amount of steam per ton of coke can be ** 450 tons per ton of coke.

H Reduce environmental pollution: Since CDQ can produce steam (5-6 tons of steam requires 1 ton of thermal coal) and can be used for power generation, it can avoid the pollution of coal burning in boilers that produce the same amount of steam, especially reducing the emission of SO2 and CO2 to the atmosphere. For a coking plant with an annual output of 1 million tons of coke, the use of CDQ can reduce various pollutants emitted into the atmosphere by 8-100,000 tons of thermal coal combustion per year.

h can improve coke quality: It is internationally recognized that the use of dry quenching coke in large blast furnaces can reduce its coke ratio by 2% and increase the production capacity of blast furnaces by 1%. Under the condition of keeping the quality of raw coke unchanged, the use of CDQ can reduce the amount of coke and fertile coal with strong cohesiveness by 10-20%, which is conducive to protecting resources and reducing coke costs.

The air-dry base is the air-dry base, which means that the coal that has reached an equilibrium state with air humidity is the benchmark.

At least not now. That's just the general direction, and it needs a process, and the National People's Congress has to revise the coal law.

It should be called gangue.

Gangue Coal associated waste rock. Solid waste discharged during excavation, mining and coal washing.

After the extra wire is energized, it is used in your hand, you can try it.

It's half a catty, the score line should be at the same level, it depends on your willingness It's good to change like a coal school is affiliated to the Shanxi Provincial Coal Industry Bureau, maybe Bi Tong will help a little bit in this aspect of graduation work. To say that the level of teaching hands is the same.

1. Due to the difference in coal quality, the hydrophilicity of different coals is not the same, and the hydrophilicity from weak to strong is anthracite-bituminous coal-lignite, and the water content of coal is divided into internal water content and external water content.

The external moisture content can be partially removed by dehydration equipment such as centrifuges, and the internal moisture of coal can only be removed by heating and drying.

Therefore, there are only two ways to dry coal quickly in winter.

1. Air dry. 2. The machine is dehydrated.

Spread the coal evenly to increase the contact area with the air.

It should also be placed in a ventilated place.