Low-cost cooperative treatment and ultra-clean emission process of steel mill sintering flue gas and system thereof
A technology for sintering flue gas and co-processing, applied in the treatment of discharged materials, waste heat treatment, improvement of process efficiency, etc., can solve the problems of low power generation efficiency, no way of removing CO and dioxin, environmental pollution, etc. The effect of improving power generation efficiency, realizing full utilization of waste heat and improving economic benefits
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Embodiment 1
[0054] Such as figure 1 As shown, this embodiment provides a steel plant sintering flue gas waste heat utilization and purification system, including a reaction furnace (1), a sintering machine (2), an annular cooler (3) and a raw material compensation unit (4);
[0055] The reaction furnace (1) mixes the flue gas after heat exchange in the annular cooler (2) with the fuel in the raw material compensation unit (4), and the annular cooler (3) includes a sinter cooling unit and a flue gas heating unit, the flue gas sintered from the sintering machine (2) enters the reaction furnace (1) through the flue gas heating unit;
[0056] The sintering machine (2) includes a sinter outlet and a flue gas outlet, and the flue gas outlet of the sintering machine (2) is connected to the flue gas heating unit of the ring cooler (3); the sinter of the sintering machine (2) is sent into the ring cooling machine (3) in the sinter cooling unit.
Embodiment 2
[0058] This embodiment provides a process for utilization and purification of sintering flue gas waste heat in steel mills. The process is carried out in the steel mill sintering flue gas waste heat utilization and purification system described in Embodiment 1, including the following steps:
[0059] The sintering flue gas in the sintering machine (2) enters the ring cooler (3) for heat exchange, the sintering flue gas heats up, and then enters the reaction furnace (1), where it is co-combusted with the supplemented fuel in the reaction furnace (1) to remove Carbon monoxide and dioxins in the flue gas, the purified flue gas is used to make steam.
[0060] A part of the sintering flue gas enters the annular cooler (3) for heat exchange, and the other part directly enters the reaction furnace (1) for co-combustion with supplementary fuel, and the sintering flue gas entering the annular cooler is 50% of the total amount of sintering flue gas. %, the temperature in the reaction fu...
Embodiment 3
[0064] This embodiment provides a process for utilization and purification of sintering flue gas waste heat in steel mills. The process is carried out in the steel mill sintering flue gas waste heat utilization and purification system described in Example 1, including the following steps: This embodiment provides a The process for utilization and purification of waste heat of sintering flue gas in steel mills is carried out in the waste heat utilization and purification system of sintering flue gas in steel mills described in Example 1, including the following steps:
[0065] The sintering flue gas in the sintering machine (2) enters the ring cooler (3) for heat exchange, the sintering flue gas heats up, and then enters the reaction furnace (1), where it is co-combusted with the supplemented fuel in the reaction furnace (1) to remove Carbon monoxide and dioxins in the flue gas, the purified flue gas is used to make steam.
[0066] A part of the sintering flue gas enters the an...
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