Novel process for coupling utilization of waste heat recovery of riser of coke oven and coke dry quenching system

Abstract

The invention discloses a novel process for coupling utilization of waste heat recovery of a riser of a coke oven and a coke dry quenching system, which comprises the steps of: combining the coke dry quenching system with a riser waste heat utilization system, using partial cooling gas (coke dry quenching recycle gas) of the coke dry quenching system to recover the heat of the riser, then sending the partial cooling gas into the middle and lower parts of a CDQ shaft to continue absorbing the heat of red coke along with other cooling gas in the CDQ shaft, and then heating a waste heat boiler to generate middle and high pressure steam further to use the steam for industries such as power generation, chemical industry, steel and the like. The process not only can recover the waste heat of raw coke oven gas in the riser, improve the grade of the energy, but also can increase the steam yield of the waste heat boiler of the coke dry quenching system. The process adopts a novel riser heat exchange device, has high heat transfer efficiency, and adopts the coke dry quenching recycle gas as medium (the coke dry quenching recycle gas is cheap and easy to obtain and cannot cause the pollution to the environment). The process has the advantages of simple system, convenient operation, and great economic benefit and environmental protection benefit.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of heat energy in coking production, and specifically relates to a new energy-saving and production-increasing process for recovering waste heat from an ascending tube to heat a waste heat boiler to generate medium and high-pressure steam by using CDQ circulating gas of a CDQ system. Background technique [0002] The National Development and Reform Commission pointed out in the "Implementation Opinions on Ten Key Energy Conservation Projects during the Eleventh Five-Year Plan" that the waste heat and pressure utilization project is one of the ten key energy conservation projects during the "Eleventh Five-Year Plan" period. Coking production has a large amount of waste heat and energy resources. The coke oven has large waste heat and high energy value, which has great value in recycling and is an important aspect of the energy-saving potential of the coking industry. [0003] From the resul...

AI Technical Summary

Problems solved by technology

One side is the waste of energy, and the other side is that the wasted heat needs to be cooled by a large amount of water consumption, which is not perfect in thermodynamics

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