Salt inhibitor, and method for deacidifying incineration flue gas by using same
A salt-resistance and deacidification technology, which is applied in the field of saline wastewater treatment in the incineration system, can solve problems that affect the stable production of the process
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Embodiment 1
[0047] A method for deacidifying incineration flue gas and realizing zero discharge of sewage, comprising the steps of:
[0048] After the high-temperature flue gas enters the quenching tower, the temperature suddenly drops below 200°C under the action of water or brine. Discharge after the dust collector.
[0049] Described incineration flue gas comprises the steps:
[0050] 1) When the high-temperature flue gas has no waste heat boiler, the cooling tower is used to cool the flue gas to above 500°C;
[0051] 2) The flue gas is rapidly cooled to below 200°C;
[0052] 3) The air grinder grinds the baking soda;
[0053] 4) Baking soda dry deacidification;
[0054] 5) Activated carbon adsorption;
[0055] 6) Filter dust removal;
[0056] 7) Step 4)-Step 6) are combined into one stage or used repeatedly to form multistage dry deacidification.
[0057] The rapid cooling of the flue gas in the step 2) adopts a downstream spray tower, and the high-temperature flue gas enters fro...
Embodiment 2
[0059] A method for deacidifying incineration flue gas and realizing zero discharge of sewage, comprising the steps of:
[0060] After the high-temperature flue gas enters the quench tower, the temperature suddenly drops below 200°C under the action of water or salt water. At this time, the ground sodium bicarbonate is sprayed in time for deacidification. When the high-salt wastewater is produced by deacidification method, and it is difficult to discharge the high-salt wastewater into the sewage treatment plant and the environment, a salt inhibitor is added to the high-salt wastewater, and after mixing evenly, the uniformly mixed high-salt wastewater is sprayed back into the Quenching tower.
[0061] Described incineration flue gas comprises the steps:
[0062] 1) When the high-temperature flue gas has no waste heat boiler, the cooling tower is used to cool the flue gas to above 500°C;
[0063] 2) The flue gas is rapidly cooled to below 200°C;
[0064] 3) The air grinder gr...
Embodiment 3
[0081] A method for deacidifying incineration flue gas and realizing zero discharge of sewage, comprising the steps of:
[0082] After the high-temperature flue gas enters the quenching tower, the temperature suddenly drops below 200°C under the action of water or salt water, and when the high-salt wastewater is difficult to discharge into the sewage treatment plant and the environment, a salt inhibitor is added to the high-salt wastewater and mixed After uniformity, the homogeneously mixed high-salt wastewater is sprayed back into the quenching tower, and at this time, the ground sodium bicarbonate is sprayed in time for deacidification.
[0083] Described incineration flue gas comprises the steps:
[0084] 1) When the high-temperature flue gas has no waste heat boiler, the cooling tower is used to cool the flue gas to above 500°C;
[0085] 2) The flue gas is rapidly cooled to below 200°C;
[0086] 3) The air grinder grinds the baking soda;
[0087] 4) Baking soda dry deac...
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