Reactor for preparing trichlorotoluene and preparation method

The reactor comprises a tower type bubbling reactor kettle body, a raw material feeding pipe and an exhaust pipe are arranged at the top of the kettle body, and a chlorine gas inlet pipe and a discharge pipe are arranged at the bottom of the kettle body; the kettle body is divided into an expansion section, a stirring section and a reaction section which are sequentially connected from top to bottom, a first sieve plate is arranged between the stirring section and the reaction section, a first connecting pipe for connecting the stirring section and the reaction section is arranged outside the kettle body, a stirring device is arranged in the stirring section, and a plurality of second sieve plates are arranged in the reaction section from top to bottom to divide the reaction section into a plurality of reaction cavities; each reaction cavity is internally provided with a catalyst feeding pipe and vertically spaced and circuitously distributed baffle plates, the baffle plates are provided with sieve pores, the