System and method for processing industrial waste gas based on combination of photoelectrocatalysis and biotrickling filter

A system for processing industrial waste gas based on a combination of photoelectrocatalysis and a biotrickling filter, comprising:

• an industrial waste gas simulation generator;
• a photoelectrocatalytic reactor;
• and
• at least one biotrickling filter;
• wherein the industrial waste gas simulation generator, the photoelectrocatalytic reactor generator and the at least one biotrickling filter are communicated through pipelines;
• the industrial waste gas simulation generator comprises a first air pump, a stripping tower, a buffer tank and a mixing tank communicated via pipelines;
• a first flowmeter is provided on a pipeline between the first air pump and the stripping tower;
• an upper end of the stripping tower is provided with a liquid-feeding pipe equipped with a first valve;
• a second valve is provided on an upper end of the buffer tank, and a third valve is provided on an upper end of the mixing tank;
• one side of a lower portion of the buffer tank is connected to a waste water discharge pipe equipped with a fourth valve;
• the other side of the lower portion of the buffer tank is sequentially connected to a second flowmeter and a second pump via pipelines;
• the photoelectrocatalytic reactor comprises a housing;
• a first plate-type catalyst, a plasma generator, a second plate-type catalyst and an ultraviolet lamp are provided in the housing in sequence along a horizontal direction;
• the first plate-type catalyst and the second plate-type catalyst are made by coating and drying a catalyst on a metal mesh plate;
• and
• the at least one biotrickling filter comprises a packing column and a circulating liquid storage tank arranged in sequence from top to bottom;
• the packing column and the circulating liquid storage tank are connected via a pipeline provided with a fifth valve;
• an upper end of the packing column is provided with a gas-discharging port equipped with a sixth valve;
• and a filler is arranged packed inside the packing column;
• a lower end of the packing column is communicated to a third flowmeter, a seventh valve and the photoelectrocatalytic reactor in sequence via pipelines;
• a position where the lower end of the packing column communicates with the photoelectrocatalytic reactor is close to a lower end of the ultraviolet lamp;
• an intake sampling port is arranged on a pipeline between the packing column and the third flowmeter;
• a liquid-feeding port is arranged on an upper end of the circulating liquid storage tank;
• one side of a lower portion of the circulating liquid storage tank is provided with a drain pipe equipped with an eighth valve;
• the other side of the lower portion of the circulating liquid storage tank is communicated to a micro water pump and a fourth flowmeter through a connecting pipe;
• an end of the connecting pipe far away from the circulating liquid storage tank penetrates a side wall of the packing column and extends into the packing column;
• and the end of the connecting pipe extending into the packing column is provided with a spray nozzle;
• and the side wall of the packing column between the spray nozzle and the gas-discharging port is provided with an outlet sampling pipe.