From January 1, 2015, nationwide diesel vehicles will enforce the National IV emission standards. With the promotion and implementation of the national IV emission standards for vehicle diesel, the domestic vehicle urea market has ushered in a new opportunity. Although this market has just started in recent years, there is great potential for domestic demand, and the sales of urea for vehicles are growing rapidly.
Research shows that automobile exhaust emissions account for about 30% of the country's total PM2.5 pollutants, which is one of the “crimes†that cause haze in China. Among them, the exhaust pollution from heavy-duty diesel vehicles is as high as two-thirds or more. The data shows that the nitrogen oxides and PM pollutants emitted by diesel vehicles, which only account for 17% of China's vehicle ownership, account for 60% and 90% of the total vehicle emissions. To this end, the Ministry of Industry and Information Technology announced that from 2015 onwards, vehicle diesel will fully implement the national IV standard.
It is understood that most of the current National IV standard diesel vehicles are using SCR engine technology, this technology needs to add vehicle AdBlue, which is commonly known as urea solution, it is a selective catalytic nitrogen oxide reduction agent, It is a 32.5% ultra-purity car urea and pure water synthesis. After the diesel vehicle “drinks†this urea, the nitrogen oxides in the exhaust emissions can be decomposed into non-polluting nitrogen and water vapor, which can directly reduce haze pollution and meet the national IV emission standards for PM and nitrogen oxides. limits. At the same time, the Chinese IV engine adopting this technology has good fuel economy, small changes to the engine, low requirements for fuel and oil, and has advantages in continuity of technology upgrades. Therefore, the SCR technology is the most suitable for the reduction of heavy diesel vehicles in China. Row of technical routes. At present, most domestic medium and heavy-duty trucks, buses and buses use the SCR technology route to meet the requirements of the National IV emission standard. Therefore, the urea needed for the SCR system becomes equivalent to diesel and has a promising market.
In 2011, the consumption of urea in vehicles in China was around 11,000 tons, which only accounted for 1% of the consumption of urea solutions for vehicles in the world. Because the National IV standard has not yet been enforced nationwide, only Beijing, Shanghai and other places have used SCR technology in the public transportation system pilots, leading to the urea market for vehicles not yet opened. However, with the full promotion of the diesel IV standard, the demand for vehicle urea is rapidly increasing and it is expected to reach 4 million to 7 million tons in 2015.
On the other hand, from the point of view of the number of diesel vehicles, market demand will also achieve rapid growth. In 2011, the sales of domestic heavy-duty diesel vehicles totaled 880,600. In 2012, they sold 636,000 vehicles. In 2013, they sold 750,000 to 76 million vehicles. Relevant professionals predict that heavy-duty diesel vehicles equipped with SCR systems will grow at a rate of at least 500,000 vehicles a year. By the end of 2015, the number of vehicles of State IV diesel vehicles is expected to reach 1.25 million in theory. By the end of 2017, it could theoretically reach 2.25 million. Vehicle. According to the calculation of diesel vehicle production, it is estimated that by 2018 China's vehicle urea market capacity will reach 7 million tons. Therefore, the sharp increase in the market size of automotive urea will become a general trend.
However, in China, there are only a few companies such as Jiangsu Kelan, Sichuan Meifeng, etc. that can produce car urea that meets international standards. Among them, the annual production capacity of AdBlue for Jiangsu Kelansu and Sichuan Meifeng are both 60. Ten thousand tons.
The QNP Steam Turbines` capacity mainly covers 200MW and below, include NI series (Normal Impulse Turbines) and HE series (High Efficiency Turbines). Our steam turbines are flexible and diverse in structure and layout so as to meet various requirement of our users. Aiming at the global leading equipment manufacturing enterprise, our design and R&D standards are higher than GB standard and in the same league with European and American energy equipment manufacturers.
1.Characteristics of QNP Turbine
QNP adopts advanced small pitch-circle technology in its high-end high efficiency turbine products, and hence considerably improved the turbines`flow efficiency.
By combining the advanced technology of European turbine with QNP technology, and optimizing the integration between imported advanced R&D tools and advanced domestic design software, QNP has solved the universal defect of inter-stage efficiency loss in most domestic units.
Using 3D bending-torsion blade design to improve the final and penultimate stage efficiency and structural strength to ensure long-time continuous operation of the unit.
Using high-speed running design and full-cycle steam distribution to improve the unit`s flow efficiency, reduce space occupancy, and make the installation more efficient.
Optimized enthalpy drop distribution design, through the comparison of tens of thousands of design data, form the best single-stage enthalpy drop distribution solution to ensure that each unit is in its maximum efficiency.
High-precision and high-quality manufacturing process: to ensure the high precision and high quality of key dynamic and static components, the flow passage components are processed by four-axis or five-axis CNC machining center.
Specially produced for high-end users, each component is carefully designed and the unit always presented to the customer as a flawless modern industrial artwork.
Maximum internal efficiency may reach 88%
2.Technical characteristics of parts
Gland sealing matching: the industry-leading and advanced gland sealing structure design reduces the steam leakage loss.
Blade assembling: the optimized blade molded lines are designed by the international advanced design software and processed by high-grade, high-precision and advanced technology which improve the thermal efficiency greatly.
Governing system: advanced governing methods are used for high control precision and fast response speed and which also has the electronic over-speed trip function, load shedding trip function, as well as auto start, grid connection and on-load function.
Rotor: we have shrink-on rotor and solid forging structure rotor which are all processed by Mitsubishi Planer machine and adjusted by vacuum high speed dynamic balancing machine to make sure the vibration of each position of bearing is in good state when the Steam Turbine running. Small vibration of the rotor we produced is a distinctive characteristic of our products.
Condenser: the stainless steel screwed pipe is used as heat exchanger with good anti- pollution ability and high heat-exchange efficiency. High-quality titanium tube is used when the cooling water is seawater. We use digital controlled lathe for drilling hole.
Casing: the split is processed by one-off molding technology and the precision of which can be 0.0058MM without any steam leakage. The concentric circles of the whole axis are processed by high precision turn-milling of the 5-joint axis machining center.
Diaphragm: we use qualitative carbon steel as the support and make the flow field better comply with the design via special welding technology so as to improve the internal efficiency.
Lubricating oil system: the multiple filtration technology--impurity strainer of oil tank, double bucket strainer for refined filtration, bearing inlet strainer which can be replaced during running--make the turbine oil entering the bearing bush achieve the best performance.
Control and protection system: QNP uses the Siemens microprocessor as the core of the system to ensure the stability and timeliness of signal processing. For important signal, multistage redundancy functions are introduced to ensure the safe and stable operation of equipment. Friendly interface makes operator work easily. More than 3-monthes` record of operating data can be saved by recording system and also can be extracted at any time.
3.Various layout and application
Except the general double-tier layout structure, we also developed steam turbine with single-tier and fast-installation layout structure, mainly includes:
(1)Oil tank as base plate:
The position of oil tank for Condensing Steam Turbine can be designed under the steam turbine as the base plate with the steam turbine, bearing pedestal and gear box on it which has same horizontal plane with condenser.
(2)Three platform and one station steam turbine:
Composed of steam turbine base plate, auxiliaries base plate, control base plate and centralized oil station for a convenient installation and layout at site. And the centralized pipeline will let the site more clean and tidy.
(3)Axial exhaust type
Mainly applied in 15-50MW condensing and pumping condensing high efficiency turbine. This type of steam turbine adopted single-tier arrangement, with axial exhaust directly into the condenser. Suitable for whole machine delivery, and can considerably shorten the installation period and reduce civil engineering costs.
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Shandong Qingneng Power Co., Ltd. , http://www.steamturbine.be