Heating process (waste heat recovery of ammonia distillation tower)
The process uses lithium bromide absorption type two heat pump, lithium bromide absorption type two heat pump is characterized by the output heat temperature is higher than the temperature of the driving heat source, can widely recover more than 60℃ low temperature waste heat, generally make more than 100℃ high temperature hot water or steam (through the flash tank), can meet the needs of process heat。
Taking the ammonia steaming process of a coking plant as an example, the heat of ammonia steam at the top of the tower is used as the driving heat source, and hot water above 100℃ is generated as the supplementary heat source for the bottom heating of the tower, which can save 26,400 tons of steam per year。
Refrigeration technology
By recovering the heat of circulating ammonia water in the coke plant, the low-pressure steam generated by the coke quenching waste heat generation, the coke oven gas power generation, the heat of the hot water in the upper section of the primary cooler, etc., as the driving heat source of the lithium bromide unit, the cold water at 16℃ is produced to meet the refrigeration requirements of the lower section of the primary cooler。
Taking a coking plant as an example, the heat of ammonia water was recovered by an ammonia-type lithium bromide absorption unit with a total cooling capacity of 9,300kW. Compared with electric refrigeration, the annual operation is 3,600h。
Petroleum and chemical industry
The waste hot water and steam generated in the recovery process (such as oil refining, EO/EG, styrene, EVA, polypropylene, caprolactam, etc.) are used as the driving heat source of the lithium bromide unit to produce cold water at or above 5℃ to meet the needs of process refrigeration。
Taking a petrochemical plant as an example, the hot water heat was recovered by a hot water lithium bromide absorption unit with a total cooling capacity of 41,856kW. Compared with electric refrigeration, the annual operation is 8,000h.
By recovering the heat of the gas gas and cylinder liner water of the gas internal combustion engine, as the driving heat source of the lithium bromide unit, the cold water of 5℃ and above is produced to meet the refrigeration needs of air conditioning or data center.
Taking a distributed energy project as an example, the total cooling capacity is 20,825kW by recovering the heat from the flue gas and cylinder liner water of a gas internal combustion engine. Compared with electric refrigeration, the annual operation is 8,000h。
Large temperature difference heat pump for heating station
Through the large temperature difference heat pump unit to reduce the return water temperature of the primary network, improve the heat transmission capacity of the heat network。
Large temperature difference heat pump compared with the traditional boiler room heating, each increase of 1 million square meters. It can save 27,600 tons of standard coal and reduce 69,000 tons of carbon dioxide emissions annually。
Thermal power plant waste heat recovery
The heat of the cooling tower in winter is recovered, the 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 the boiler energy consumption.
Taking a thermal power plant as an example, the heat of the cooling tower is recovered by a steam type lithium bromide absorption heat pump unit. The total recovered residual heat is about 62MW, and the annual operation is 3,600 hours。
The process waste heat steam and hot water are used as the driving heat source of the lithium bromide unit to produce cold water above 5℃ to meet the needs of the process or air conditioning refrigeration。
Taking a monosodium glutamate plant as an example, steam was used as the driving heat source, and the total cooling capacity was 18,000kW. Compared with electric refrigeration, the annual operation is 3,600h。
Energy sources such as waste heat steam, hot water and natural gas are utilized as the driving heat sources for the lithium bromide unit, which is used to generate chilled water at 5°C or higher to meet the refrigeration requirements of either the production process or air - conditioning systems.。
Take a certain automobile manufacturing plant project as an example. Using steam as the driving heat source, the total cooling capacity is 7,000 kW. Compared with electric refrigeration, the annual operation is 3,600 hours.
By reclaiming the heat from the exhaust gas of the internal combustion engine and the cylinder jacket water, and using it as the driving heat source for the lithium bromide unit, and through optimizing the structure and materials, the unit can withstand the effects of ship swaying and seawater corrosion. It can produce chilled water at 5°C or higher to meet the requirements of air - conditioning refrigeration.
Take a 30,000 - ton passenger - ro - ro ship as an example. By recovering the heat from the exhaust gas of the internal combustion engine and the cylinder jacket water, the cooling capacity reaches 900 kW. With an annual operation of 3,240 hours, this can save 116 tons of diesel consumption annually.
The heat of water vapor within the low - temperature drying machine is recovered. Steam is employed as the driving heat source, and 90°C hot water is generated via a steam - type lithium bromide absorption heat pump, thereby reducing energy consumption.
Take a certain sludge drying plant as an example. The heat of 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 operation time is 8,000 hours.
The heat within the boiler flue gas is recovered. With natural gas serving as the driving heat source, a direct - fired lithium bromide absorption heat pump is utilized to raise the temperature of the boiler's return water. This not only reduces the energy consumption of the boiler but also achieves the goal of eliminating the visible white plume from the flue gas.
Take a certain heating company as an example. The heat of boiler flue gas is recovered by a direct - fired lithium bromide absorption heat pump unit. The total recovered waste heat is approximately 3,023 kW, and the annual operation duration is 3,600 hours.
Leverage the process waste heat in the form of steam, hot water, and esterification steam as the driving heat sources for the lithium bromide unit. This setup enables the production of chilled water at a temperature of 5 °C or higher to meet the cooling requirements of air - conditioning systems or industrial processes.
Take a certain chemical fiber project as an example. By recovering the heat of esterification steam, the total cooling capacity reaches 11,630 kW. Compared with electric refrigeration, the annual operation time is 8,000 hours.
