O-nitro-p-methylsulfonylbenzoic acid maintenance-free pipeline filter

The utility model discloses an o-nitro-p-methylsulfonylbenzoic acid maintenance-free pipeline filter, and belongs to the technical field of pipeline filtration. The device comprises a first filter anda second filter which are connected in parallel, wherein the first filter comprises a filter pipe and a filter screen plate; the filter pipe is provided with a liquid inlet, a liquid outlet and a slag outlet; the filter screen plate is installed in the filter pipe, the liquid inlet is connected with an inlet valve, the liquid outlet is connected with an outlet valve and a blowback valve, the slagdischarge port is connected with a slag discharge valve, the blowback valve is connected with a fan, and the liquid inlet end of the second filter is connected with an inlet valve. The filter is suitable for continuous production of o-nitro-p-methylsulfonylbenzoic acid, online cleaning is achieved after the filter is switched, the disassembly procedure is omitted, the production efficiency is improved, the overhaul amount