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Rising-tube waste heat recovery
The rising‑tube waste‑heat recovery system has overcome the three longstanding technical challenges in the coking industry—graphite fouling, coke‑tar deposition, and water leakage. Employing a self‑developed heat‑exchanger equipped with a nano‑self‑cleaning coating, the system effectively inhibits tar adhesion and graphite buildup, significantly enhancing heat‑transfer efficiency and extending equipment service life. This technology is compatible with various coke‑oven configurations, enabling highly efficient waste‑heat recovery and facilitating its industrial‑scale, large‑volume, and commercial deployment.
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(Patent for Invention No. 201711132863.4)
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Nano high-temperature-resistant thermal insulation material
Nano‑high‑temperature‑resistant thermal insulation material is a high‑performance insulating coating formulated on the basis of an aqueous inorganic high‑temperature‑resistant binder system, incorporating nano‑inorganic mesoporous heat‑blocking particles, high‑temperature‑resistant multifunctional fillers, and reinforcing ceramic fibers. It exhibits excellent properties such as low thermal conductivity, superior high‑temperature resistance, strong adhesion, and outstanding corrosion resistance and durability. The coating can be applied by spraying or brushing onto complex, irregularly shaped equipment surfaces and is suitable for a wide range of substrates, including metals and refractory materials. It finds extensive use in high‑temperature industrial sectors such as metallurgy, petrochemicals, power generation, and building materials, delivering significant benefits in reducing energy consumption, improving working conditions, and extending equipment service life.
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In response to the complex composition, high pollutant concentrations, recalcitrance, and high salinity of coking wastewater, a comprehensive treatment process combining biochemical treatment, membrane separation, and evaporation‑crystallization has been implemented to achieve true zero liquid discharge—enabling water reuse while recovering and valorizing sodium chloride and sodium sulfate from the salt fraction.
The biochemical treatment employs an O‑A/O‑A/O process; membrane separation utilizes a UF‑RO1‑RO2 configuration for reclaimed water and a multi‑stage NF process for salt fractionation; and evaporation‑crystallization adopts triple‑effect evaporation coupled with cryogenic cooling and re‑crystallization for salt recovery.
The biochemical system primarily removes the majority of COD, ammonia nitrogen, cyanide, and other pollutants, ensuring that effluent quality fully meets regulatory standards. The membrane separation stage focuses on water recovery, producing concentrated brine suitable for subsequent evaporation‑crystallization. Finally, the evaporation‑crystallization unit enables the resourceful utilization of sodium chloride and sodium sulfate while solidifying residual salts, thereby achieving true zero liquid discharge for coking wastewater.
This integrated technology offers significant advantages, including stable operation, strong resistance to shock loads, high water‑recovery efficiency, consistent salt‑product quality, and genuine zero liquid discharge.
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Jiangsu Longye Energy‑Saving Technology Co., Ltd. is a comprehensive energy‑saving and emission‑reduction service provider that integrates R&D, design, manufacturing, engineering general contracting, and operation‑and‑maintenance services.
Learn more →Jiangsu Longye Energy-Saving Technology Co., Ltd.
Phone:0519-85258626
Email:longyetech@jslyjn.com
Address: No. 8, Hehuan South Road, Zhonglou District, Changzhou City, Jiangsu Province
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