2. Generally speaking, improving the fineness of pulverized coal is to make pulverized coal thinner, which will make pulverized coal easier to catch fire and burn completely, reduce the carbon content of fly ash and reduce the possibility of secondary combustion; At the same time, the flame center of the furnace is relatively reduced and the efficiency of the furnace is relatively improved. However, with the improvement of pulverized coal fineness, the power consumption of pulverizing system increases, and the wear of grinding parts of coal mills (especially steel ball mills) increases, which increases the maintenance. Therefore, for the power plant, the commissioning unit will give the coal quantity and current reference value of the coal mill in normal operation according to the grindability coefficient of the designed coal.
3. Different furnace types also need adhesion index. If the adhesive content is high, it may stick to the stove.
4. The sulfur content of coal is too high, and the sulfur discharged into the air naturally increases, which leads to unqualified environmental protection and is fined by the environmental protection department. Moreover, high sulfur will corrode the furnace and damage its service life.
5, understand the power plant coal unloading facilities, coal unloading methods, can be targeted loading, in order to improve the quality and stability of our coal supply, as well as the success rate of fraud.
6. Basic settlement price, quality reward and punishment terms, payment method and settlement speed.
7. The focus of supervision is, of course, to prevent other inferior coals from rushing in, to check whether the appearance of our coal supply is qualified, and to conduct sampling tests on our coal before departure, so as to facilitate power plants to compare the test results.
8. Basic settlement price, quality reward and punishment terms, payment method and settlement speed are the most important.
9. One is natural weathering, and the other is stealing coal. Reasonable loss is part of the cost. If it is transported by train, there is no way to avoid it. Automobile transportation is also difficult to control. To put it bluntly, it is to resign. It is absolutely impossible for the carrier to compensate for the reasonable loss.
10, keep abreast of local coal prices and supply prices of various factories, and adjust the delivery direction according to market conditions every month.
1 1, base price, calorific value, total sulfur, total water, ash, volatile matter, transportation mode, payment mode, transportation capacity guarantee, and value-added tax of this batch of coal.
12, value-added tax, income tax and some smaller local taxes. Generally, we only pay attention to value-added tax, and income tax can increase the cost through other methods to achieve the purpose of paying less or not.
13, entrance fee, storage fee, loading fee, railway freight, unloading fee, storage fee, and some have to pay agency fee.
Think so much for the time being. Welcome to my coal QQ group 104400492. You can ask me some questions that are not detailed.