Summary of achievements: In terms of sludge drying treatment, a variety of resource treatment technologies with low operating costs have been developed, and many utility models and invention patents have been obtained.                                                

Technical characteristics: The process flow is relatively simple and covers a small area; it can be directly transformed in existing equipment, making full use of the original equipment of the power plant; it can replace the accident spray system located at the front end of the desulfurization tower; it is also equipped with an automatic control system, which can adjust the water volume of the spray system according to the power plant under different operating conditions.

(1)The invention can realize zero emission of desulfurized wastewater in a true sense, and finally part of the wastewater is discharged along with flue gas in the form of water vapor, and part of the wastewater is transported outward in the form of solid mixed salts. At the same time, while achieving zero wastewater discharge, it can achieve the effect of eliminating colored smoke plumes. The system can be transformed on the original basis of the power plant, has a small area, low cost, greatly reduces civil construction costs, and has good economy.

(2)The invention effectively utilizes low-temperature flue gas waste heat (smoke temperature is 90 - 120 DEG C) from the power plant without introducing other heat sources, and saves energy.

(3)The invention can directly replace the emergency spraying system at the front end of the existing power plant desulfurization tower.

(4)According to the invention, during the concentration process of low-temperature flue gas wastewater, the wastewater will absorb part of SO2 in the flue gas (during the continuous concentration process of wastewater, when the pH in the concentration tank reaches about 1.5 - 2, about 5% of SO2 will be absorbed), which improves the desulfurization efficiency; and at the same time, it has a good removal effect on SO3 and heavy metal mercury in the flue gas.  (5) The computer control system provided in the present invention can realize full automation of control and save labor.