Jiangsu Haifa Machinery Manufacturing Co., Ltd.

The boiler circulating pump is a core piece of equipment in the startup system of coal-fired power boilers, primarily used for transporting boiler water during startup, low-load operation, and forced circulation conditions. Operating for extended periods in harsh environments with high temperature, high pressure, and high cavitation risk, the reliability, stability, and safety of this equipment directly affect the safe operation of the boiler system and even the entire unit. Therefore, the boiler circulating pump is not just an ordinary pump; it is a critical guarantee for the safe and stable operation of coal-fired power units. For a long time, the key technologies for boiler circulating pumps have been controlled by foreign companies, and domestic high-parameter units have relied heavily on imported products for such equipment. This not only increases project procurement and maintenance costs but also creates constraints in spare parts supply, technical services, and operational support, affecting the autonomy and controllability of China's energy equipment industry chain. With the continuous improvement of domestic high-end equipment manufacturing capabilities, the localization of boiler circulating pumps has become an important direction for advancing the autonomy of coal-fired power equipment. To address key challenges in the operation of boiler circulating pumps, domestic enterprises have conducted systematic research focusing on hydraulic design, rotor structure, stator manufacturing, and sealing safety. First, by developing hydraulic models with low net positive suction head requirement and wide-range high efficiency, the pump can adapt to various operating conditions such as startup, low load, and variable conditions, ensuring stable flow and head while effectively reducing cavitation risk and improving operational efficiency. Second, an innovative high-reliability solid composite integrated rotor has been developed, structurally solving industry pain points such as the tendency of traditional canned sleeves to bulge and welds to crack, thereby enhancing the overall strength and long-term operational reliability of the rotor. Meanwhile, to address the challenges of limited space small-sized stators and difficulties in winding insertion, a process for inserting large-span coil windings into confined spaces has been developed, breaking through technical bottlenecks in stator manufacturing and improving the manufacturing precision and insulation reliability of the motor section. Additionally, the boiler circulating pump has been equipped with a sealing structure resistant to high temperature and high water pressure, ensuring the integrity and reliability of the boiler pressure boundary, preventing leakage of high-temperature and high-pressure media, and further safeguarding equipment operational safety. The breakthrough in key technologies for boiler circulating pumps marks a step forward for China in the field high-end pump equipment for coal-fired power. Their localization not only helps procurement and maintenance costs for power plants but also improves spare parts response speed and on-site service capabilities. More importantly, it enhances the security and autonomous controllability of the energy equipment supply chain. the future, with the stable application of more domestically produced boiler circulating pumps in coal-fired power units, this will further drive the development of China's high-end industrial pumps toward high parameters, high reliability, and long service life, providing solid support for the localization of energy equipment and the safe operation of the power industry. Jiangsu Haifa Machinery Manufacturing Co., Ltd. was restructured from Jiangsu Ligong Group Co., Ltd., formerly the Jingjiang Stainless Steel Pump and Valve Factory of the Steel Research Institute under the Ministry of Metallurgical Industry, established in 1958. It mainly produces API610 chemical process pumps - OH1 pumps, OH2 pumps, OH3 pumps, OH4 pumps, BB1 pumps, BB2 pumps, BB3, BB4, BB5 multistage pumps, VS1, VS4, VS5, VS6 barrel pumps, HES type chemical process pumps, chemical pumps, petrochemical pumps, sixth-generation ultra-low carbon stainless steel high-quality leak-proof molten urea pumps, urea hydrolyzer feed pumps, high-temperature asphalt pumps, pitot tube pumps, rotary jet pumps, low-flow high-head pumps, multistage vortex pumps, high-temperature molten salt pumps, high-temperature nitric acid pumps, vertical sump pumps, magnetic drive pumps, low-temperature liquid hydrogen and methanol pumps, high-pressure liquid hydrogen pumps, high-temperature nitric acid magnetic drive pumps, magnetic drive pumps for conveying solid-containing media, industrial pumps, canned motor pumps, slurry pumps, titanium tetrachloride pumps, self-priming pumps, lined fluoroplastic pumps, sandwich-lined fluoroplastic pumps, leak-proof pumps, desulfurization and denitrification pumps, alkali pumps, pumps, geothermal pumps, oil pumps, axial flow pumps, printing and dyeing pumps, dyeing and finishing pumps, Ti alloy pumps, C-276 material, Hastelloy, 316L, forced circulation pumps, fourth-generation nuclear pumps, island pumps, special pumps for filter presses, refrigerant pumps, long-shaft vertical sump pumps, CQC first-level energy efficiency chemical pumps, high-pressure descaling industrial pumps, and Chinese chemical pumps. www.jslgpump.com Contact number: 13905263417 E-mail: jslgpump@gmail.com E-mail: jsareva@163.com