Defoaming agent adding device for water outlet in sewage treatment system

The utility model discloses a defoaming agent adding device for a water outlet in a sewage treatment system, which comprises an equipment cabinet, a partition plate is vertically arranged in the equipment cabinet and divides the equipment cabinet into a solution chamber and an equipment chamber, and a solution barrel is arranged in the solution chamber; a shelf is transversely arranged in the equipment chamber, a frequency converter is arranged above the shelf, a peristaltic pump is arranged below the shelf, and the frequency converter is connected with the peristaltic pump; the liquid inlet end of a hose of the peristaltic pump penetrates through the partition plate and then extends into the solution barrel, a liquid outlet pipe is arranged on the side wall of the equipment cabinet, and the liquid outlet end of the hose of the peristaltic pump is connected with the liquid outlet pipe. When the defoaming device is used for adding a defoaming agent, foam can be effectively prevented from being formed at a disc