Device for removing organic matters in wastewater

According to the technical scheme, the device is characterized by comprising a ground body, a constant-temperature cooling water system is built on the top face of the ground body, a tail gas pipe is fixedly installed at one end of a feeding port of the constant-temperature cooling water system, a still kettle is arranged on one side of the constant-temperature cooling water system, and a water outlet of the still kettle is communicated with the ground body. A first conveying pipe is fixedly mounted between the still kettle and the constant-temperature cooling water system, a cooling tower is arranged and is used for cooling a sulfuric acid solution with the concentration of about 15% generated in the production of copper phthalocyanine to 20 DEG C, the sulfuric acid solution contains a large number of byproduct organic matters, one of the byproduct organic matters is cyanuric acid, the cyanuric acid is slightly dissolved in acid, and the content of the cyanuric acid in the sulfuric acid solution is reduced;