Several past decades have shown ever-growing attention to environmental issues. More and more people begin to understand that one must not use thoughtlessly the resources granted by nature. This problem is especially urgent in the Tyumen Region, that is why the responsibility imposed on the enterprises operating in the oil and gas sphere is higher than elsewhere. Antipinsky Oil Refinery CJSC ranges among organizations implementing innovative solutions in the sphere of environmental protection and industrial security. To fulfill these tasks, comprehensive work is carried out in various areas.
We thought about minimizing negative impact on the environment even at the stages of design and construction of the refinery. In this regard special attention was paid to the application of high ecological standards. In particular, a sealed system is used in the entire processing chain. Oil is discharged from the safety valves of processing equipment via a closed system to drainage tanks, from which a liquid phase returns to the crude park, and the gaseous one is directed to the flare. Equipment and pipelines are discharged in a similar way, when they are put out of operation for repair. It makes it possible to avoid pollutant emissions in the atmosphere.
The air-cooling system, the efficiency of which significantly enhances in the cold season, is in charge of ground water protection. Organized drainage schemes and land runoff purification methods used for treatment facilities are applied at the enterprise; purified industrial sewage and steam condensate concentrated in the gasoline separator for electrical desalting are used repeatedly. For the purposes of preventing accidental sewage discharge, all pipelines were laid as deep as from one and a half to four meters below ground in the course of constructing the second start-up facilities. To avoid corrosion, only up-to-date coatings and materials are used in the networks of domestic, industrial, and storm-water sewage, in drainage sewer vessels, while shut-off and control valves, as well as equipment, are always selected in compliance with performance characteristics and corrosive activity of the ambience.
In order to avoid pressure increase in the system in excess of established parameters, the equipment is fitted with safety valves. In addition to that, automatic control of gas contamination is exercised on a permanent basis in a mandatory manner.
Among technological solutions making it possible to reduce impact on the environment it is worth of mentioning the following: fitting of tanks and oil loading racks intended for oil and light-oil products with a gas-equalizing system; keeping the lowest limit of positive temperature in finished-product storage tanks for the purpose of reducing evaporation of the product; dispersion of combustion products discharged by fuel-burning units with pipes of sufficient height.
To avoid accidents, the equipment and pipelines are obligatorily tested for durability after assembly works. To prevent emergency situations, control and computerization of technological processes is also introduced, as well as strict compliance with established parameters should be observed, too. Pipelines and various constructions are provided with reliable sealing, that is why oil and oil-product spills are impossible. All concrete platforms for processing equipment are fitted with border guard rails and ladders, and wells have shutters and hydraulic locks.
Environmental protection plan on providing ecological security and minimization of negative impact on the environment is regularly amended taking into account commissioning of new facilities and analysis of measures taken over the previous year.
The main task of this plan is to reduce harmful impact on nature. Besides, the purpose of the plan is to carry out high-quality industrial environmental monitoring of sources discharging hazardous substances to the atmosphere and their potential impact on the environment. Moreover, much attention is paid to improvement of the system of control over nature protection activity in compliance with requirements of local, regional, federal, and international standards, as well as to abidance by active legislation.
For this purpose industrial environmental control is exercised at the enterprise on a permanent basis. A special department consisting of qualified employees responsible for revealing and preventing violations of ecological regulations, for planning and supervision of various actions taken in the area of environmental protection is in charge of it. Monitoring is carried out using the refinery’s modernly equipped chemical analytical laboratory, as well as by other accredited laboratories of Tyumen. It is due to the work of the ecology department in many respects that the refinery manages to achieve reduction of impact on the environment.
Information about environmental conditions within and outside the territory of the enterprise is analyzed by the management team and considered in the course of taking managerial decisions in the area of nature-protection and industrial activity.
Biological treatment systems
As of today facilities are being built at Antipinsky Oil Refinery CJSC which will be able to provide for purification of industrial and storm waste waters up to required extent in the future, when oil refining capacity increases. It will make it possible to use purified waste waters repeatedly or discharge them to a fishery water body from both, functioning plants and newly commissioned and designed facilities.
Wastewater treatment process will consist of four blocks. The first one is intended for protecting the main facilities from rubbish, volley and accidental pollutant discharges, for regulating unevenness of different untreated waste waters flowing into main sewage treatment facilities.
The second block of physical-chemical sewage treatment provides for purification of previously clarified waste waters from suspended substances and oil products.
The third block will be intended for biological treatment of waste waters (using a membrane bioreactor of GE Water and Process Technologies). This model has a number of advantages as compared to traditional technology. First, it becomes possible to considerably increase purification quality indices due to efficient removal of suspended and colloid substances, bacteria, viruses. The other positive difference consists in creation of conditions for effective biological destruction of organic compounds and biological organisms owing to the membrane’s ability to retain long molecules for protracted period of time. Besides, significantly smaller territory is required for treatment facilities, when using a membrane bioreactor due to excluding some traditional stages of treatment (thus, it is not necessary to separate water and sludge mixture in the secondary sedimentation tank). And finally, computerization of technological processes using modern controlling equipment, the algorithms for which are developed on the basis of research on biological treatment control, is a substantial plus.
The principle of operation is as follows: vacuum is created by using a pump inside hollow membrane fibers and due to such vacuum the filtered water flows through the membrane, comes to the hollow fibers, and then to collectors. The obtained filtrate fills the back-flushing tank, from which purified waste water flows to the deep wastewater post-treatment and sewage disinfection block. Aeration unit is integrated in the lower part of the membrane module. The air blown by an air-moving device exerts influence on the surface of membrane fibers and prevents sedimentation of impurities on their outer surface.
Post-treatment of waste waters is to take place on the final fourth block (the process of a two-stage filtration using FSU sorption carbon filters with subsequent UV disinfection of waste waters as required by Sanitary Rules and Standards (SanPin) in section “Hygienic Regulations for Surface Water Protection). The total area of treatment facilities makes up 10.73 hectares.
Cooperation with a view to the future
The enterprise is planning to achieve in 2013 the oil refining volume of 7.5 million tons per year. According to preliminary estimates, due to such growth of volumes the pollutant emissions to the atmosphere will increase by 8-10% of the total amount of emissions.
In this connection the plan of nature-protection measures for ensuring ecological security at the enterprise will be drawn up for the year of 2013, laboratory research of atmospheric air will be carried out with regard to compliance with regulations for maximum permissible pollutant emissions nearby industrial discharge sources and at the boundary of a sanitary protection zone.
Within the framework of ecological security the management team of Antipinsky Oil Refinery CJSC is actively communicating with the regional government, the Federal Service for Supervision of Nature Resources (Rosprirodnadzor) for the Tyumen Region, Russian Federal Consumer Rights Protection and Human Health Control Service (Rospotrebnadzor) for the Tyumen Region, as well as the Tyumen Administration Ecology Committee.
Against the background of the growing volumes of oil production and refining the issues of environmental protection and industrial security are those of top priority for both governmental structures and oil refining companies. It is obvious that there is acute necessity for introducing of comprehensive measures aimed at minimizing of hazardous impact on the environment resulting from industrial operation of oil refining facilities. Just due to joint efforts and comprehensive approach with regard to the issues of nature protection the enterprise has managed to achieve such results that the activity of the refinery exerts minimum influence on the environment.
2013: The commissioning of ELOU-AT-3 unit with the capacity of 3.7 million tons p.a., and enhancing the enterprise’s capacity up to more than 7.5 million tons p.a. for crude oil refining.
2014: Improving the diesel-fuel quality according to requirements of Euro-5 standards (with sulfur content not exceeding 10 ppm), production of winter and arctic diesel fuel.
2015: Increasing the oil processing depth up to 94% by commissioning a combined deferred tar carbonization unit with a fuel-oil vacuum distillation block.
2016: Transfer to the production of Euro-5 high-octane gasoline with the octane number of no lower than 95 points under research method. 2017-2018: Construction of the vacuum gas oil hydrocracking unit, the raw material for which will be the refinery’s own vacuum gas oil from the deferred carbonization unit and the vacuum block.