Biofilter tower exhaust gas purification system

Abstract

The invention relates to a biofilter tower exhaust gas purification system, which achieves the aim of purification by applying immobilized microorganisms to degradation of harmful and toxic components in the exhaust gas. The system consists of a biofilter tower unit and a spray unit, wherein the biofilter tower unit comprises a tower body, an exhaust inlet on the upper part of the tower body, a plurality of communicated filter chambers which are separated by a plurality of baffles, and a multi-layer surface modified foam ceramic carrier and a purified gas outlet which are arranged in each filter chamber. The system is characterized in that: 1) exhaust gas in a plurality of filter chambers in the filter tower passes through continuously in a sinuous motion track; and 2) an immobilized microorganism carrier adopts the novel surface modified foam ceramic for the first time. The spray unit comprises a pump, a nozzle, a regulating tank, a circulating water tank, a humidity sensor, a controller, a pH meter and the like and ensures proper humidity, nutrition and pH in the filter tower to allow the microorganisms to grow normally. The biofilter tower exhaust gas purification system has the advantages of: 1) good mass transfer performance without open circuit, and easy realization of equipment production; 2) large surface loads and mass loads; 3) large biological loads; 4) good high-concentration toxic pollutant resistance; and 5) capability of realizing ideal empty tower retention time.

Description

Technical field: [0001] The invention relates to a waste gas purification system of a biological filter tower, which uses immobilized microorganisms to degrade toxic and harmful components in the waste gas, thereby achieving the purpose of purification. Background technique: [0002] A large amount of waste gas is inevitably produced in many industrial production processes. These waste gases are not suitable for recycling, and usually contain multi-component toxic and harmful organic and inorganic substances, which are harmful to human body and environment, and cause waste gas pollution. [0003] At present, there are many technologies used for exhaust gas control. The commonly used technologies mainly include absorption method, adsorption method, chemical oxidation method, photoionization method and biological method. Among them, the biological method has low operating cost and can remove many harmful substances at the same time. Biological methods to purify waste gas usual...

AI Technical Summary

Problems solved by technology

Engineering practice and research show that these filter towers have defects in five aspects: ①Because the existing carrier used for microorganism immobilization in the filter tower is organic or inorganic filler, the mass transfer effect is poor and it is easy to cause short circuit. Agitating the packing or replacing the packing, the purification effect is poor and it is not conducive to the equipment production of the filter tower; ②The surface load (i.e. volume load) and mass load (i.e. the mass of pollutants per unit volume) are small, so the removal capacity (unit bed volume remove pollutant quality) and removal rate is also smaller; ③ biological load is small; ④ anti-high-concentration toxic pollutant performance is poor; The contact time with microorganisms) is short, which affects the removal capacity and removal rate

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