Coking waste gas circulation treatment integrated system and method

The invention discloses a coking waste gas circulation treatment integrated system and method.The system comprises a desulfurization and denitrification spray tower, the system recycles large-particle coke in waste gas through a waste gas particle filtering and collecting box, the waste gas can be treated through a catalyst, and heat of the waste gas is exchanged to lime water; the waste gas is cleaned by utilizing the heated lime water, so that the desulfurization and denitrification effects are realized, the heated lime water can generate steam, the steam is fully contacted with the waste gas, so that the purification efficiency and quality are improved, the purified waste water can be filtered and recycled, and the aim of saving resources is fulfilled. According to the whole system, purified waste gas is detected through the waste gas detector, when the waste gas is improper, the waste gas can be returned into the spray tower to be continuously purified, and the system can recover available substances in t