Anti-blocking and cooling device for flue gas inlet of deacidification tower and its use method

Abstract

The invention discloses a deacidification tower flue gas inlet anti-blocking and cooling device, which comprises a deacidification tower body (1) and an air inlet (4), and a first nozzle (21) is arranged at the air inlet (4). ), the first nozzle is communicated with the annular water pipe (3), and the annular water pipe (3) is also communicated with a connecting pipe (31), and the connecting pipe (31) is provided with a second nozzle (22); A detachable recovery device is provided on the connecting pipe (31), and a water inlet (32) is provided on the annular water pipe (3). The invention also discloses a method for using the anti-blocking cooling device for flue gas inlet of the deacidification tower. The above-mentioned device and method of use can isolate the high-temperature flue gas from the flue, take away the settled foreign matter in the flue gas in time, avoid the formation of "stalactite"-like blockages on the flue, and reduce the Damage to flue material due to wet and high acid corrosion.

Description

technical field [0001] The invention relates to an anti-blocking and cooling device for flue gas inlet of a deacidification tower. The invention also relates to a method for cooling and preventing blockage of the deacidification flue gas. Background technique [0002] The incineration flue gas of thermal power generation, domestic waste incineration, hazardous waste incineration, etc. contains high concentration of acidic substances (mainly SO2, HCl). The deacidification process is used to remove acidic substances. Because a large amount of acidic substances in the flue gas react quickly with the absorbent to form salt at high temperature, the circulating fluid is in direct contact with the high-temperature flue gas, and the water evaporates quickly to cause salt crystallization. The deposition at the entrance of the deacidification tower causes blockage, and the flue gas contains a large amount of fine dust, which is mixed with crystallized salt to form a high-hardness sub...

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Problems solved by technology

[0002] The incineration flue gas of thermal power generation, domestic waste incineration, hazardous waste incineration, etc. contains high concentration of acidic substances (mainly SO2, HCl). The deacidification process is used to remove acidic substances. Because a large amount of acidic substances in the flue gas react quickly with the absorbent to form salt at high temperature, the circulating fluid is in direct contact with the high-temperature flue gas, and the water evaporates quickly to cause salt crystallization. The deposition at the entrance of the deacidification tower causes blockage, and the flue gas contains a large amount of fine dust, which is mixed with crystallized salt to form a high-hardness substance like "stalactite", which further aggravates the The current solution is to set a certain number of manholes on the flue at the entrance of the tower, and regularly remove the blockages manually. The operating environment is poor and the labor intensity is high; To avoid blockage of the inlet flue, industrial water is used for spraying to reduce the temperature of the flue gas to below 160°C, which causes waste of industrial water and increases the amount of sewage in the deacidification system

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