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Construction Begins on Refrigeration Project Utilizing Waste Heat from Recycled Ammonia Water at Huangling Coal Chemical Industry Company / Source: Sinochem News Network Date: 2020-06-01 Clicks: 6 Recently, the energy-saving project of Shanxi Coking Huangling Coal Chemical Industry Company – namely the refrigeration project that makes use of waste heat from recycled ammonia water – has begun construction. After the renovation of this system, it can not only meet the water requirements for the production process and improve various operational parameters of that process, but also reduce the operating costs of the equipment to a minimum, thereby maximizing energy conservation and emission reduction and promoting clean production. The waste heat utilization refrigeration project using circulating ammonia water is one of the key projects to be implemented by the company in 2020. The project adopts the Energy Management Contracting (EMC) model to upgrade the 4 steam-based refrigeration units in the existing cooling station. By utilizing the waste heat from the coke oven gas as a heat source, ammonia water is circulated through a process to absorb this waste heat; this circulated ammonia water is then used as a heat source to feed directly into the lithium bromide refrigeration units. This setup enables the production of high-quality process cooling water in summer and self-sufficient heating in winter. It not only facilitates the recovery of the sensible heat from the coke oven gas, reducing the workload on the upper section of the primary cooler and increasing tar production, but it also saves a large amount of steam and reduces carbon dioxide emissions. It is estimated that once the project is completed and put into use, it will save approximately 95,000 tons of steam per year, as well as over 9,000 tons of standard coal. Additionally, it will reduce emissions by 22,000 tons of carbon dioxide, 670 tons of sulfur dioxide, and 330 tons of nitrogen oxides.