Biotrickling filter for treating volatile organic waste gas

Abstract

The present invention relates to a BTF used for dealing with the volatile waste gas, belonging to the field of treatment of the volatile waste gas, which aims at solving the problems that the prior BTF has uneven air flow distribution and biomass distribution, high center gas speed and voltage drop, and the prior BTF is easy to be blocked. The technic proposal is that: the volatile waste gas passes through an intake pipe (1) and then comes into a biofilter (22), and then being drained away by an exhaust pipe (9) after having the processes of degradation and purification; a nutrient solution (11) comes into the biofilter (22) through a nutrient solution shower (18) and a dropwise adding distributor device (19) having fixed quantities at fixed time; the present invention is characterized in that adopting a light and cheap packing (4) with different grain diameters, the biofilter (22) takes a homocentric column shape sleeve structure , the grain diameters of the filled packing (4) from the center to the edge are distributed from small to big, the centre area is filled with the packing (4) with small grain diameters, the ring area of the around close walls is filled with the packing (4) of big grain diameters. The present invention makes the distribution of the biomass in the biofilter even, thereby fully utilizing the useful space of the biofilter.

Description

technical field [0001] The invention relates to a biological trickling filter bed for treating volatile organic waste gas, belonging to the field of volatile organic waste gas treatment. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are a large class of gaseous organic pollutants, mainly referring to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point less than 260°C at normal pressure. VOCs are various, widely distributed and highly toxic. VOCs exhaust gas comes from a wide range of sources, some of which come from large fixed sources (such as petrochemicals, wastewater treatment facilities, pharmaceuticals, etc., leakage from valves and pumps, storage and transportation of low-boiling organic compounds, etc.; a large amount from vehicles, electroplating, painting and organic The exhaust gas emitted by the use of solvents has the characteristics of wide pollution, large ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a biological trickling filter bed for treating volatile organic waste gas. It solves the problem of uneven gas distribution on the gas cross section, improves the effective degradation space, and has the characteristics of pressure drop and uniform biomass distribution.

Images