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Flue gases and exhaust gases from industries such as electricity, steel, and biochemistry are generally treated using devices for desulfurization, denitrification, and similar processes. In particular, after undergoing ultra-low emission upgrades in the power industry, the control parameters established are dust, sulfur dioxide, nitrogen oxides, and mercury and its compounds; the emission limits for these substances are 10 mg/m3, 35 mg/m3, 50 mg/m3, and 0.03 mg/m3 respectively. In some areas, the emission limit for dust is set at 5 mg/m3. From an environmental perspective, significant improvements have been made in the elimination of pollutants. At present, the desulfurization of most sulfur-containing flue gases and exhaust gases in our country is carried out using the limestone-gypsum wet process. This process uses desulfurization slurry to absorb sulfur dioxide and sulfur trioxide from flue gas. After adopting the wet flue gas desulfurization process, the lower the temperature of the desulfurization slurry, the better the desulfurization effect. Generally, the flue gas temperature is reduced to 45–55°C. In the flue gas after desulfurization, the water vapor is essentially at saturation, resulting in a high moisture content. During emission, as the flue gas mixes with the atmosphere and disperses, its temperature drops, causing the water in the flue gas to precipitate and form white mist around the chimney, commonly known as \"flue gas plume\". The exhaust gas or fumes discharged have a low temperature and high humidity, preventing effective dispersion and creating a contradiction. To ensure desulfurization efficiency and address the issue of white plumes during flue gas emission, it is necessary to develop a new type of high-efficiency desulfurization tower that can eliminate these white plumes while ensuring that flue gas emissions meet regulatory standards. To save space, some desulfurization towers are equipped with chimneys directly on top of them, allowing the flue gas after desulfurization to be discharged directly through these chimneys at the upper part of the tower. This design helps to reduce the required floor space, but it still presents the problem of white plumes during the emission of flue gas. The flue gas whitening slurry cooler can **improve the whitening efficiency; this slurry cooling solution addresses the issues of flue gas temperature and humidity within the system. 1. Reduce the temperature of the raw flue gas: decrease water consumption in the desulfurization tower and reduce moisture emissions ； 2. Reduce the net flue gas temperature: Lower the saturation temperature of the flue gas, causing the water vapor in it to condense and thereby reducing moisture emissions.