Deacidification device for atomizing alkali liquor by using double-fluid spray gun

Abstract

The invention relates to the technical field of environmental protection, and particularly relates to a deacidification device for atomizing alkali liquor by using double-fluid spray gun. The deacidification device comprises an alkali liquor storage tank, a transfer pump, a stirring tank, an injection pump, a double-fluid atomization spray gun and a deacidification reaction tower. The deacidification device is characterized in that the transfer pump is arranged between the alkali liquor storage tank and the stirring tank, and the injection pump is arranged between the stirring tank and the fluid atomization spray gun. The deacidification device has the advantages of simple process, high deacidification efficiency, less equipment, low investment cost, equipment failure and low maintenance cost. Compressed air is used for atomizing liquid alkali liquor into tiny particles, the contact area between the tiny particles and smoke is large, and the reaction efficiency is high. The deacidification effect is similar to that of a semand i-dry method deacidification system, the equipment structure is simple, a huge and complex pulping system does not exist, easily-soluble alkali liquor is adopted, the risk of lime slurry scaling is avoided; meanwhile, a high-speed rotary atomizer does not need to be used, and the risk of tripping caused by the fact that the high-speed rotary atomizer frequently has the faults of large vibration, high oil temperature and the like is avoided.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a deacidification device which utilizes a two-fluid spray gun to atomize lye. Background technique [0002] At present, the deacidification processes of waste incineration power plants mainly include dry deacidification, semi-dry deacidification, and wet deacidification. [0003] Dry deacidification is mainly to use jet fan to spray lime powder into the tail flue of incinerator and mix with flue gas to remove HCL and SO in flue gas 2 and other acid gases. Semi-dry deacidification is mainly to mix lime and water to form lime slurry, which is transported to the top of the deacidification tower through a lime slurry pump, and then the lime slurry is atomized into tiny lime slurry particles by a high-speed rotary atomizer and mixed with the flue gas discharged from the boiler Remove the acid gas in the flue gas. The wet deacidification method mainly uses the flue ...

AI Technical Summary

Problems solved by technology

However, the semi-dry deacidification process has the disadvantages that the lime slurry pipeline is easy to scale, the high-speed rotating atomizer is prone to failures such as large vibration, and the cost of the atomizer is high and the maintenance is difficult.

The wet deacidification process is the process with the highest removal efficiency among the three deacidification processes at present, but the wet process is complicated, the investment cost is high, the operation and maintenance are complicated, and the wastewater generated during the operation needs to be treated. The wastewater generated in the process needs to be treated. The main reason is that the flue gas is in direct contact with the deacidification solution during the wet deacidification process, and most of the water is taken away in the flue gas, and the temperature drops greatly. It is necessary to set up a dehumidifier and a flue gas-flue gas The heat exchange device increases the complexity and investment cost of the equipment, so currently domestic waste incineration power plants using wet deacidification are rare

Images