The application of ZS screw blower in desulfurization process: Excessive emissions from coal combustion are one of the pollution sources in haze days. The task of clean development of coal-fired power is arduous and urgent. Since 2015, China's coal-fired power plants have planned to fully install dust removal, desulfurization, and denitrification devices to meet ultra-low emission standards. By 2020, the world's largest clean and efficient coal-fired power system will be built.
Atlas Copco's screw blower also plays an important role in the desulfurization process of coal-fired power plants. The following is the actual application of ZS screw blower in Tianjin Sinopec Thermal Power Plant.
Sinopec Tianjin Branch (hereinafter referred to as Tianjin Sinopec) was established on December 28, 1983, located in the Binhai New Area of Tianjin, covering an area of 14 square kilometers. The annual processing capacity is 12.5 million tons/year, and the ethylene production capacity is 1.2 million tons/year. It is under the jurisdiction of a thermal power plant, and the third phase includes 220 tons/hour, 410 tons/hour, and 465 tons/hour steam boilers. Adopting the most widely used wet desulfurization technology internationally, limestone is made into lime slurry, which is sprayed and atomized inside the absorption tower to contact the flue gas, thus achieving the purpose of desulfurization. This process requires a blower to transport air to achieve oxidation desulfurization reaction.
Desulfurization engineering is currently the environmental protection project with the highest one-time investment and continuous operation investment in the construction of thermal power plants. The selection of equipment will directly affect the economic and technical aspects of the entire project investment. As a crucial large-scale equipment in the entire desulfurization operation, the selection of oxidation fans is directly related to the investment and operational effectiveness of the entire project. Therefore, Tianjin Sinopec conducted a meticulous and rigorous comparison when selecting blower suppliers. Among the two suppliers finally locked in, Atlas Copco's ZS screw blower stands out by virtue of its fan efficiency, low noise and other advantages.
Atlas Copco ZS series blowers are manufactured according to the standards of high quality and reliability. ZS series products combine Atlas Copco's mature screw technology and long-term internal engineering practice, with outstanding reliability. The design, manufacturing, and testing of ZS blower all comply with ISO 9001 certification standards, and the unparalleled ZS means that your production will never be interrupted. In the lifecycle cost of a blower, energy consumption can account for 80%. Compared to Roots blower technology, The ZS series blower can reduce energy consumption by an average of 30%. The integrated variable frequency (VSD) technology can automatically and accurately adjust the compressed air flow rate according to air demand, thereby further reducing energy consumption. Compared with Roots blower technology, screw technology does not require the replacement of belts and pulleys, which further reduces maintenance costs and extends normal operating time.
Chen Qiang, a senior product expert in Atlas Copco's Low Pressure Air Department, pointed out that "Atlas Copco's ZS series oil-free screw blower is the most advanced energy-saving product used to replace Roots blower. Roots blower is subject to high resistance of internal air flow due to belt, wheel slide, external compression, silencer and inlet filter, resulting in high pressure drop and high energy consumption. Our ZS screw blower, which is built with an integrated gearbox, has internal air circuit optimization, which effectively reduces pressure drop and air turbulence, and can minimize energy consumption costs. The performance comparison of Atlas Copco's new ZS series screw blower is superior to three leaf Roots blower, which has been made by T V according to the international standard ISO 1217T 〉 V test confirmation."
The Tianjin Sinopec Phase III project, consisting of Phase I 2x ZS132CW-J-132kW, Phase II 5x ZS132CW-132kW, and Phase III 5x ZS110CW-110kW, will have a total of 12 ZS series screw blowers in service for desulfurization flue gas transportation. The energy efficient Atlas Copco screw blower is also making a contribution to the clean and low-carbon development of the power industry.
