Novel dilute acid collecting device

The invention relates to a novel dilute acid collecting device and relates to the field of dilute acid collection of desulfurizing towers and desulfurizing absorption towers, an absorption tower of the novel dilute acid collecting device is provided with a first tower body and a second tower body arranged in the first tower body, a fan for providing negative pressure is arranged at the top of the first tower body, and a dilute acid collecting tank is arranged at the bottom of the first tower body. The second tower body is arranged between the fan and the dilute acid collecting tank, and the top of the second tower body is communicated with a smoke pipe for discharging smoke, so that the smoke enters from the top of the second tower body. The second tower body is of a tubular structure with an opening in the lower part, the second tower body is provided with a mixing cavity, a contraction part and a trumpet-shaped reaction extension cavity which are sequentially connected from top to bottom, a first-stage spra