The main products of the plant are calcined petroleum coke. To obtain calcined petroleum coke, crude petroleum coke is used. Petroleum coke roasting is the process of heating crude petroleum coke to 1250-13500С. Due to the physical and chemical processes that occur with the raw material, there is an improvement in the consumer properties of coke.
After evaporation of moisture and removal of volatile / volatile components, coke is heated to 1350 ° C. Moreover, its molecular structure takes a more organized form with a clear crystal lattice. The main goal of the calcination process is to improve the physical and chemical properties of coke, such as electrical conductivity, true density, oxidizability and reactivity.
When heating and calcining coke in the furnace, fuel (fuel oil), part of the coke and the volatile combustible substances released from it are burned, releasing a large amount of flue gases with a high temperature. Since the latter contain a small amount of unburned fuel, volatile substances and pulverized coke, the flue gases after the calcination furnace enter the afterburner. In the afterburner, due to the burning of additional fuel (fuel oil), the temperature regime is maintained, which ensures almost complete combustion of the flue gas components, as well as their constant flow rate and temperature.
To recover the high potential heat of the flue gases, after the afterburner, they enter the waste heat boiler, where, due to this, medium-pressure water vapor with a temperature of about 400 0C is generated. The volume of steam generated significantly exceeds the plant’s needs for thermal energy, so most of the steam is used to generate electricity in the turbine compartment, which is part of the petroleum coke calcination unit.
The flue gases cooled in the waste heat boiler after being cleaned of ash and dust in bag filters enter the chemical treatment department, where, due to the treatment of flue gases with chemical reagents-solutions of caustic soda and calcium hydroxide, almost complete conversion of sulfur dioxide occurs to produce a gypsum-containing product.
Thus, the commercial products of the installation of calcination of petroleum coke are:
The crude oil coke design capacity is:
The design capacity for calcined petroleum coke is:
Pavlodar region, Pavlodar,
Northern Industrial Region, Special Economic Zone "Pavlodar". Customer LLP UPNK-PV.
The UPNK project is included in the state program for accelerated industrial and innovative development of the Republic of Kazakhstan, the project is approved by the Ministry of Industry and New Technologies and is included in the regional Industrialization Map. (Resolution of the Akimat of Pavlodar region dated February 1, 2013 No. 32/2)
Crude oil coke of PNHZ LLP and other oil refineries - 280 thousand tons per year.
2011-2015 гг.
Start of the first stage - Q3 2015;
Start of the 2nd stage - Q4 2015 year
| UPNK Products | 1st stage | 2st stage |
|---|---|---|
| Calcined coke, thousand tons per year | 102 | 205 |
| Generated electricity, thousand kW * hour | 48 000 | 72 000 |
| consumed | 16 000 | 32 000 |
| excess | 32 000 | 40 000 |
| Gypsum, thousand tons per year | 2 | 4 |
Total project cost: 16.800 billion tenge.
NPV – 3, 502 billion tenge;
IRR – 22 %;
Simple payback period - 7 years;
Discounted payback period - 8 years.
For the construction period - 324;
For the period of operation - 300.
