The utility model discloses a VOC (
volatile organic compound) lower liquid
recovery device of a high-
oxygen system, which belongs to the field of coking production equipment and comprises production devices capable of generating VOC
waste gas in the working production process of the high-
oxygen system, each production device is provided with an air entraining channel for collecting the VOC
waste gas, each air entraining channel is communicated with a VOC
recovery header
pipe, the VOC
recovery header
pipe is obliquely arranged in the air, and the VOC recovery header
pipe is communicated with the production devices. The end connected with the air entraining channel is a high end, the other end is a low end, the low end leads to the VOC alkaline washing
tower and the VOC treatment device, the VOC recovery header pipe is provided with a fan used for supplying air to guide and convey VOC, the bottom of the middle end of the VOC recovery header pipe is provided with a plurality of liquid discharging pipelines used for collecting
waste gas condensate, and the liquid discharging pipelines are connected and gathered to a liquid discharging
storage tank. The lower
liquid storage tank is connected with an alkali liquor bin of the VOC alkaline washing
tower, and a lower liquid conveying pump used for conveying lower liquid to the VOC alkaline washing
tower is arranged in the lower
liquid storage tank. The device is simple in structure, waste liquid can be effectively recycled, and the problem of liquid expansion during production is avoided.