Enameled tube, air preheater

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This post was last edited by Yamei on 2018-6-3 at 14:17. The ceramic-coated pipe is made using low-carbon steel as its base material; a ceramic glaze containing new materials that are resistant to high temperatures, corrosion, and wear is mixed in according to a specific scientific formula and applied to the outer surface of the steel tube. It is then sintered at high temperatures to produce a composite pipe that is free from cracks, resistant to acid and alkali corrosion, able to withstand the impact of flue gas, has a smooth surface, presents low resistance to flue gas flow, and is less prone to clogging. The advantages of Qi Quan brand enamel tubes in the industry lie in their enamel-coating process: The main enamel-coating methods available on the market are electrostatic coating and wet coating. Electrostatic coating utilizes static electricity to attach enamel powder to steel pipes. Due to the inherent limitations of this method, the enamel applied using it has weak adhesion and is relatively thin; moreover, some manufacturers, due to inadequate technology, end up causing scratches on the surface of the enamel tubes, which severely affects their corrosion resistance and wear resistance. Our company uses a well-developed wet lining process, ensuring that the pipes remain vertical and undistorted throughout the entire production process. Compared to electrostatic glazing, the wet glazing process results in greater adhesion of the enamel glaze. By using a two-glazing-two-firing process, the thickness and corrosion resistance of the enamel glaze are ensured to the fullest extent. Development of ceramic glazes: In 2016, our company partnered with the Enamel Glass Research Institute of Donghua University (the only public research institute specializing in enamel glass in China) to establish a Research Center for High-Performance Enamel Glazes for Low-Carbon Energy Conservation. We developed various types of environmentally friendly enamel glaze formulas with independent intellectual property rights, including high-performance enamel glazes suitable for boilers used in biomass power plants. We also developed low-carbon, energy-saving production processes and equipment for these glazes. It is possible to customize the glazes according to the type of fuel burned in the boilers, thereby meeting the needs of different customers and achieving true customization while improving the cost-effectiveness of the products. Energy for production: Currently, coal, natural gas, and electricity are the main sources of energy used in the market. Coal has a low energy cost, but its temperature and combustion rate are difficult to control, which has a significant impact on the quality of enamel tubes. Moreover, the sulfides and carbides produced during coal combustion can cause certain degree of corrosion and damage to the enamel tubes during the firing process ； Although the temperature of natural gas energy can be controlled, it is still impossible to prevent the corrosion of enamel tubes by sulfides and carbides during the combustion of natural gas. After thorough investigation and taking into account its own operational conditions, our company has opted for electric energy as the power source, utilizing a new type of enamel tube firing furnace. This furnace consists of a furnace body, with electric heating wires installed on the inner wall of this body; it also includes a furnace chamber, suspension brackets, and hooks. The suspension brackets are composed of an outer ring and an inner part – the outer ring is circular in shape, and the outer ring and the inner part are fixedly connected to each other. Hooks are provided on both the outer ring and the inner part. The suspension brackets are located at the center of the furnace chamber. The advantages of this enamel tube sintering furnace are that it results in minimal deformation of the produced enamel tubes, which helps to improve their straightness and ensures high quality in their production. The use of electric heating allows for better control and stability of temperature ； It also **improves production efficiency, saving time and effort. Moreover, no smoke is generated during the firing process, which fully ensures the quality of the enamel tubes. Dedicated service: The products manufactured by our company have passed the quality inspections conducted by various boiler manufacturers. We are now qualified suppliers for Jiuguo, Hangguo, Taishan Group, and Zhengzhou Boiler Factory. With nearly 30 years of experience in the power generation industry, we possess extensive expertise in operation and maintenance. By choosing us, clients can receive not only product-related services but also opportunities for knowledge exchange and access to shared resources. Unlimited potential: To further expand production, the manufacturing company has worked closely with Shanghai Liangshi to invest in a new project for the research, development, and production of industrial enamel products (a key construction project in Jinan in 2017). The first phase of this project involves an investment of 320 million yuan; it covers an area of 120 mu, and its planned production capacity is 50,000 tons per year of enamel-coated tubes and corrugated plates for heat exchange applications, as well as 50,000 square meters of enamel sheets for architectural decoration purposes. Within two years, 16 patents with independent intellectual property rights were developed, including 6 invention patents. In addition, a workstation for professional master’s students will be established. An air pre-heater is a device located in the flue gas duct at the rear of a boiler; it uses internal heat exchange elements to pre-heat the air entering the boiler to a certain temperature on the heat-exchanging surfaces. Used to improve the heat exchange efficiency of boilers and reduce energy consumption. Currently, both industrial boilers and power plant boilers suffer from low-temperature corrosion and ash blockage in their smooth-tube air preheaters, which directly affects the reliability and economic efficiency of these boiler systems. The problem becomes even more severe when burning coal with high sulfur content. At present, air preheaters account for 6%–8% of the total investment in boilers in thermal power plants in China. The direct costs associated with equipment replacement and shutdowns for cleaning due to low-temperature corrosion and ash buildup account for about 4%–5% of the operating costs each year. If the losses resulting from shutdowns and interruptions caused by these issues are added in, the total cost becomes even higher. Currently, many power plants stop their boilers for maintenance frequently in order to avoid low-temperature corrosion and ash buildup, even at the cost of raising the boiler’s flue gas temperature. It is estimated that for every 10°C increase in the boiler’s flue gas temperature, the boiler’s thermal efficiency decreases by 0.5%–0.7%, resulting in significant energy losses. In recent years, the power generation industry has implemented the strictest ultra-low emission standards ever. In the face of the crisis, the group swiftly seized business opportunities, quickly established a production and R&D team for enamel heat exchange components, and established its manufacturing capacity at the fastest possible pace. The enamel heat exchange elements produced by our company feature stable quality and excellent performance. We have established long-term strategic partnership relationships with four major boiler manufacturers: Jiguo, Hangguo, Taiguo, and Zhengguo. The equipment we produce is exported to various countries such as the United States, Thailand, Turkey, and Pakistan. Projects such as test bases. It is expected that within three years, the manufacturing company will become the largest air preheater production base in the country, offering the highest quality products, the best service, the widest range of options, and the most comprehensive systems