At the Dalian Municipal Economic Commission, two innovative, energy-saving, and environmentally friendly boilers developed independently by the Dalian Boiler Plant received high praise from the appraisal committee's experts. The panel expressed strong support for the technology and recommended that mass production begin soon.
Lin Zonghu, chairman of the appraisal committee and an academician of the Chinese Academy of Engineering, along with Professor Bodao from Xi'an Jiaotong University, highlighted the significance of the oil-fired coal-fired steam injection boiler. This model uses affordable coal instead of oil as fuel, significantly boosting the economic efficiency of oil fields. Meanwhile, the high-temperature hot water boiler integrates four advanced technologies, making it both energy-efficient and eco-friendly. So far, the Dalian Boiler Factory has secured over 10 orders for coal-fired steam injection boilers.
The boiler is a subcritical pressure chain grate coal-fired direct current boiler, playing a key role in heavy oil extraction. It is a world-first innovation and has been granted numerous national patents.
According to Liu Zhimin, director of the Dalian Boiler Factory, traditional methods of heavy oil extraction have led to significant losses of oil and gas resources, lowering the commodity rate of oil fields. Each coal-fired steam injection boiler costs around 14 million yuan to invest in, while the operating cost of a fuel injection steam boiler is about 12.05 million yuan annually. This means the payback period is roughly 14 months. For example, at Liaohe Oilfield, which produces 12 million tons of crude oil yearly—80% of which is heavy oil—over 200 existing fuel (gas) boilers are in use. These consume approximately 10% of the total output, or 12.5% of heavy oil production, costing about 4 billion yuan annually.
With China producing nearly 30 million tons of heavy oil each year and more than 600 fuel (gas) steam injection boilers in operation, replacing them with coal-fired models could save over 5 billion yuan annually in thermal injection costs.
According to statistics, industrial boilers account for one-third of the country’s total coal consumption. Most are small, outdated coal-fired boilers, which suffer from high energy consumption, pollution, and safety risks. Therefore, transitioning to large-scale centralized heating systems is becoming a necessary and inevitable trend.
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