Iron and coke

Heating process (waste heat recovery from the ammonia still)This process uses a lithium bromide absorption type II heat pump. The characteristic of a lithium bromide absorption type II heat pump is that the output hot temperature is 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 above 100℃ (through a flash tank), which can meet the needs of process heating. Taking a certain coking plant's ammonia stripping process as an example, the heat of the top ammonia vapor is used as the driving heat source to produce hot water above 100℃ as a supplementary heat source for bottom heating, saving 26,400 tons of steam annually.Refrigeration processBy recovering the heat from the circulating ammonia water in the coking plant, the low-pressure steam generated by dry quenching coke waste heat power generation, coke oven gas power generation, and waste heat boilers, and the heat from the upper part of the primary cooler, etc., are used as the driving heat source for the lithium bromide unit to produce 16℃ cold water to meet the cooling needs of the lower part of the primary cooler and other processes. Taking a certain coking plant as an example, through an ammonia water type lithium bromide absorption unit recovering the heat of the ammonia water, the total refrigeration capacity is 9,300 kW. Compared with electric refrigeration, it operates 3,600 hours per year.

About

670

Ten thousand kW · h

Annual electricity savings

About

2,700

tons

annual standard coal saving

About

6,700

tons

Annual reduction of CO2 emissions