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Coking of steel

Heating process (waste heat recovery of ammonia distillation tower)The process uses a lithium bromide absorption-type heat pump. This type of heat pump is characterized by its ability to output heat at a temperature higher than the driving heat source temperature. It can widely recover low-temperature waste heat above 60℃, generally producing high-temperature hot water or steam (via a flash tank) exceeding 100℃, meeting process heating needs. For example, in a coking plant's ammonia steaming process, the heat from ammonia steam at the top of the tower serves as the driving heat source, generating over 100℃ hot water as supplementary heat for the tower's bottom heating, saving 26,400 tons of steam annually.Refrigeration technologyBy recovering heat from circulating ammonia water in the coke plant, low-pressure steam generated from coke quenching waste heat, coke oven gas power generation, and the heat from hot water in the upper section of the primary cooler, etc., as the driving heat source for the lithium bromide unit, 16℃ cold water is produced to meet the refrigeration needs of the lower section of the primary cooler. In a coking plant example, an ammonia-type lithium bromide absorption unit with a total cooling capacity of 9,300 kW recovered the heat from ammonia water. Compared to electric refrigeration, the annual operating time is 3,600 hours.

Petroleum and chemical industry

Waste hot water and steam from recovery processes (e.g., oil refining, EO/EG, styrene, EVA, polypropylene, caprolactam) are used to drive a lithium bromide unit, producing cold water at or above 5℃ for process refrigeration. For example, in a petrochemical plant, a hot water lithium bromide absorption unit with a total cooling capacity of 41,856 kW recovers hot water heat. Compared to electric refrigeration, with 8,000 hours of annual operation.

District energy

By recovering waste heat from the gas and cylinder liner water of a gas internal combustion engine, and using this as the driving heat source for a lithium bromide unit, cold water at 5℃ or above can be produced to meet the cooling needs of air conditioning or data centers. In a distributed energy project, for example, a total cooling capacity of 20,825 kW is achieved by recovering heat from the flue gas and cylinder liner water of a gas internal combustion engine. Compared to electric refrigeration, the annual operating time is 8,000 hours.

Energy power

Large temperature difference heat pump for heating stationUsing a large temperature difference heat pump unit to reduce the return water temperature of the primary network improves the heat transmission capacity of the heat network. Compared to traditional boiler room heating, for each 1 million square meters increase, a large temperature difference heat pump can save 27,600 tons of standard coal and reduce 69,000 tons of carbon dioxide emissions annually.Thermal power plant waste heat recoveryThe cooling tower's heat is recovered in winter. Steam turbine extraction is used as the driving heat source, and the return water temperature of the primary network is raised by the steam lithium bromide absorption heat pump to save boiler energy consumption. For example, in a thermal power plant, a steam type lithium bromide absorption heat pump unit recovers heat from the cooling tower. The total recovered residual heat is approximately 62MW, with annual operation of 3,600 hours.

fermentation

Process waste heat steam and hot water are used as the driving heat source for the lithium bromide unit to produce cold water above 5℃ for process or air conditioning refrigeration needs. For example, in a monosodium glutamate plant, steam was used as the driving heat source, with a total cooling capacity of 18,000 kW. Compared to electric refrigeration, the annual operating time is 3,600 hours.

Manufacture

Energy sources such as waste heat steam, hot water, and natural gas are used as the driving heat sources for the lithium bromide unit, which generates chilled water at 5°C or higher to meet the refrigeration needs of the production process or air-conditioning systems. For example, in an automobile manufacturing plant, using steam as the driving heat source, the total cooling capacity is 7,000 kW. Compared to electric refrigeration, the annual operating time is 3,600 hours.

marine unit

By reclaiming waste heat from the exhaust gas of the internal combustion engine and cylinder jacket water, and using it to power a lithium bromide unit, and through structural and material optimization, the unit can withstand the effects of ship motion and seawater corrosion. It can produce chilled water at or above 5°C, meeting air-conditioning and refrigeration needs. For a 30,000-ton passenger-ro-ro ship, recovering waste heat from the exhaust gas and cylinder jacket water yields a cooling capacity of 900 kW. With 3,240 annual operating hours, this saves 116 tons of diesel fuel per year.

sludge drying

The heat from water vapor in the low-temperature drying machine is recovered. Steam is used as the primary heat source, and 90°C hot water is generated using a steam-type lithium bromide absorption heat pump, thus reducing energy consumption. Take a certain sludge drying plant as an example. The heat from the low-temperature dryer is recovered by a steam-type lithium bromide absorption heat pump unit. The total recovered waste heat is approximately 5,300 kW, and the annual operating time is 8,000 hours.

flue gas waste heat recovery

The heat within the boiler flue gas is recovered. A direct-fired lithium bromide absorption heat pump, using natural gas as the primary heat source, raises the temperature of the boiler's return water. This reduces the boiler's energy consumption and eliminates the visible white plume from the flue gas. For example, a certain heating company recovers boiler flue gas heat using a direct-fired lithium bromide absorption heat pump unit. Approximately 3,023 kW of waste heat is recovered annually during 3,600 hours of operation.

Textile and chemical fiber

Utilize process waste heat in the form of steam, hot water, and esterification steam as the driving heat sources for the lithium bromide unit. This configuration allows for the production of chilled water at a temperature of 5 °C or higher to satisfy the cooling needs of air-conditioning systems or industrial processes. Consider a specific chemical fiber project as an illustration. By recovering the heat from esterification steam, the total cooling capacity reaches 11,630 kW. Compared to electric refrigeration, the annual operating time is 8,000 hours.

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