Project Introduction Thermal power plant cooling towers consume a large amount of water resources each year, with the circulating loss of water in the cooling tower accounting for 65% to 75% of the total water consumption of the plant. Most of this water loss is dissipated from the top of the cooling tower in the form of mist. Currently, there are no effective measures to recover these water losses. Our team has designed a new type of cooling tower water recovery device that utilizes air discharge ion wind technology to recover water mist. Through the device, it is possible to achieve a water recovery rate of over 90%, equivalent to recovering 1.13 tons of water per kilowatt-hour of electricity consumed. The team evaluates the water recovery device based on three indicators: project cost, input-output ratio, and environmental value, as follows: The water collection device adopts a modular design with multiple parallel honeycomb units, a hanging bed installation scheme, and an electrode form of multi-wire-water film structure, which greatly saves on device materials. The main components of the device are made of PVC for the honeycomb chamber walls, stainless steel wire for the multi-wire electrodes, and fiberglass for the insulating support frame, with a total cost of about 740,000 yuan (taking a cooling tower example with an outlet diameter of 54.462m from a thermal power plant), and a cost of about 317 yuan/m2 per unit area. Input-output comparison: For the ion wind cooling tower water collection device, the input is the cost of electricity consumed per unit area of the device, while the output is the cost of water recovered per unit area of the device. The energy consumption per unit working area when this device generates ion wind is: 41.4 × 10^-3kW/m^2 Calculated based on the unit area water recovery rate after installing the ion wind water collection device for the cooling tower. Through experiments, it is known that the drainage rate of the water vapor environment simulation platform per unit area is 0.068 cubic meters per hour, and the device recovery efficiency is 91.3%. The obtained water recovery amount per unit area is: 0.062 cubic meters per hour. A conservative estimate for the factory electricity price is 0.5 yuan per kilowatt-hour, and the industrial water price is 3 yuan per cubic meter. In summary, the input-output ratio of this device is 9.0. Combining survey data calculations, it is expected that the annual net income per unit area of this device can reach 1625 yuan/(m²·year), which can recover the manufacturing cost within 1 to 2 years after being put into use. Innovation points Applying the principle of air corona ion wind to the field of water recovery, using self-sustaining water film electrodes, adopting a honeycomb multi-stage parallel modular design, solving insulation problems with a high-voltage-to-ground-to-high-voltage layered design, and implementing a hanging bed installation scheme. A series of experiments were conducted on the device to determine its honeycomb structure, as well as key parameters such as the optimal electrode form and working voltage. Considering the water vapor environment at the top of the cooling tower and the characteristics of the device itself, a self-sustaining water film electrode was innovatively used in this device. This not only ensures the water recovery rate but also saves materials and reduces the weight of the device. The technical key points of this work include the optimization and determination of device parameters, insulation issues under harsh working conditions, and the solution to the problem of erecting large-mass objects at high altitudes.