Balancing barrel of acid feeding system

The utility model discloses a balance barrel of an acid inlet system, the lower end of a balance barrel body is provided with a three-way joint, one end of the three-way joint is closed, the other end of the three-way joint is connected with a liquid outlet pipe, one side of the lower end of the balance barrel body is connected with a liquid inlet short column, and the other side of the lower end of the balance barrel body is connected with a liquid level pipe assembly. An overflow groove is formed in the upper end of one side of the balance barrel body, a through hole communicated with the interior of the overflow groove is formed in the side face of the balance barrel body, three positioning frames are arranged in the overflow groove, each positioning frame is of a U-shaped structure, two sliding ways are formed among the three positioning frames, an insertion plate is arranged in any sliding way, and the insertion plate is connected with the overflow groove. The lower end of the front surface of the overfl