Treatment system for caffeine production wastewater

The invention relates to a treatment system for caffeine production wastewater. The treatment system comprises a sodium theophylline mother liquor storage tank, a methylation raffinate storage tank, a primary chlorine extraction waste liquor storage tank and a washing mother liquor storage tank, the dechlorination tower is communicated with the primary chlorine extraction waste liquid storage tank; effluent of the sodium theophyllite mother liquor storage tank, the methylation residual liquor storage tank, the washing mother liquor storage tank and the dechlorination tower is combined and then is communicated with a stock solution inlet of the low-temperature evaporator through a pipeline; the incinerator is communicated with a finished liquid outlet of the low-temperature evaporator; a heat exchange pipeline is arranged in the incinerator and used for heating steam entering the low-temperature evaporator. And a biochemical treatment unit. The treatment system for the caffeine production wastewater is low in