Application of modified synthetic petroleum coke p

2022-08-16
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The application of modified synthetic petroleum coke powder in glass kilns

the glass industry is a high energy consumption industry, in which the fuel cost accounts for about 35% - 50% of the glass cost. The glass furnace is the equipment with the most energy consumption in the glass production line. Taking a 450t/d float glass kiln as an example, based on the annual consumption of 30000 tons of heavy oil, after using modified synthetic petroleum coke powder as fuel, assuming that 500 yuan per ton of fuel is saved, a kiln can save more than 15 million yuan of fuel cost per year. A horseshoe flame kiln with an annual consumption of 10000 tons of heavy oil can save 5million yuan in fuel costs under the same conditions

replacing traditional energy with new energy not only saves valuable oil resources for the country, but also reduces costs, increases profits and improves the market competitiveness of products for enterprises. The newly developed non energy sequence fuel emulsified coke slurry and coke powder not only saves fuel operation costs, but also greatly reduces the energy consumption index of enterprises. Using petroleum coke powder to replace fuel oil is in line with the national energy-saving technology policy, and has been listed in the implementation opinions of the ten key energy-saving projects in the eleventh five year plan by the national development and Reform Commission

petroleum coke is a porous, non-polar hydrocarbon, which belongs to hydrophobic substances. At present, several suitable additives and equipment selected from dozens of high-quality additives and pulverizing equipment have been chemically re synthesized in the market, and emulsified coke slurry and coke powder with high concentration, low viscosity, long storage cycle, good flow performance and good combustion characteristics have been successfully prepared. This application technology has applied for invention patents and utility model patents to the State Intellectual Property Office, and has been accepted. Petroleum coke is the end product of the petroleum family. It has both the physical properties and thermal properties of petroleum

modified synthetic petroleum coke powder is a new type of fuel. The research of this project involves the fields of energy, polymer material chemistry and so on. It has interdisciplinary characteristics and high technical difficulty. The successful research and development of this project has developed a new fuel system for industrial kilns, especially the glass industry, which can save a lot of scarce fuel resources for the country, with obvious energy saving and consumption reduction effects and remarkable economic benefits

according to the characteristics of glass kilns, a large number of cold and hot tests have proved that the modified synthetic petroleum coke powder developed is completely suitable for combustion in glass kilns

at the same time, various technologies of modified synthetic petroleum coke powder replacing heavy oil in glass furnace are also maturing

in order to make the preparation and combustion technology of modified synthetic petroleum coke powder more perfect and reliable, domestic research units have finally made the combustion technology of modified synthetic petroleum coke powder have the conditions for successful use in glass kilns through three stages of improvement and perfection

first, petroleum coke is dehydrated to make its moisture content ≤ 5%. Before and after crushing, it is electromagnetically de ironed to prevent ferrous materials from entering the raw materials. It is crushed to particles less than or equal to 5mm. Adding additives can play the role of moisture-proof, anti caking, lubrication and conducive to pneumatic transportation, and has a certain combustion supporting effect. After ultra-fine grinding, the system can process up to four different belt materials with more than 200 meshes in one production operation, Then it is sent to the finished powder bin. The whole process adopts the effective combination of collection filter, induced draft fan and conveying system, as well as the strict control of each dust point, so as to avoid dust overflow and negative pressure operation in the whole production process

second, control and combustion. Modified synthetic petroleum coke powder is a solid particle fuel. Its combustion process consists of five stages: air transportation, heat absorption of coke powder mixed with high-temperature air, volatile combustion, carbon powder combustion and burnout. The combustibility of a fuel mainly includes three aspects: ignition, stable combustion and burnout. The ignition and burnout of coke powder are two major difficulties. By changing the combustion characteristics of coke powder, reasonably adopting the technology of air distribution and adding special additives, these two problems have been completely overcome, which not only makes the ignition of coke powder easy, but also makes its burnout rate reach more than 99%

third, the powder feeding system uses spiral gas transportation to send coke powder into the furnace, so as to achieve the purpose of controlling the rigidity and length of the flame, the atmosphere in the furnace and the air demand in different areas, meet the stable and effective combustion under different conditions, and ensure that the glass quality is not affected

the burnout rate of modified synthetic coke powder in the kiln is mainly determined by the relationship between the residence time of the fuel in the furnace and the total combustion time of the particles by applying pre deformation to the leaf spring installed on the fatigue test bench. The residence time of the fuel in the furnace is determined by the running speed of the fuel particles in the furnace. The total combustion time includes five stages of the combustion of modified synthetic coke powder, in which the carbon particle burnout process plays a leading role

the conclusion of expert research results is:

the combustion time is proportional to the square of particle radius, which makes it have a certain potential energy; When the pendulum swings freely, the initial concentration of the reaction gas is inversely proportional, and other parameters are empirical constants

the key point of burnout rate lies in the particle size and distribution of coke powder

the length and stiffness of the flame are inversely proportional to the particle size. In glass furnaces, the finer the particle size of coke powder is, the better. At present, the burnout rate of modified synthetic petroleum coke powder developed by the research unit has reached more than 99%, which can fully meet the needs of glass production process

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