Modularized photocatalytic device for organic waste gas treatment and method

The invention discloses a modularized photocatalytic device for organic waste gas treatment and a method. The device comprises a shell, one end of the shell is provided with a gas inlet connected with a gas inlet pipe, the other end of the shell is provided with a gas outlet connected with an exhaust pipe, and the exhaust pipe is connected with a draught fan module; the interior of the shell is sequentially divided into a pretreatment section, a main reaction section and an aftertreatment section in the direction from the gas inlet to the gas outlet, and the interior of the pretreatment section and the interior of the aftertreatment section are each provided with a spraying module; photocatalytic modules and ultraviolet lamp modules are alternately arranged in the main reaction section in the direction from the pretreatment section to the aftertreatment section. According to the treatment device and technology, the photocatalytic treatment efficiency is improved through water spraying pretreatment, the water