Coke oven gas purification device capable of efficiently recycling waste heat of coking plant

The utility model relates to a coke oven gas purification device capable of efficiently recycling waste heat of a coking plant. Heat exchange box, an air inlet pipe is arranged on the left side of theheat exchange box; an air outlet pipe is arranged on the right side of the heat exchange box; a heat exchange pipe is arranged in an inner cavity of the heat exchange box; a steam pipe is arranged atthe top of the heat exchange box; the top end of the steam pipe is fixedly connected with a steam turbine; the top of the steam turbine is fixedly connected with a generator; an electrical tar precipitator is arranged on the gas outlet pipe; the right side of the electrical tar precipitator is connected with a purification box through a gas guide pipe; a filter layer is arranged in an inner cavity of the purification box; the filter layer consists of a naphthalene removal filter disc and a desulfurization filter disc; the naphthalene removal filter disc is located at the top of the desulfurization filter disc, a heati