Tail gas treatment and discharge mechanism of a sludge dryer

Abstract

The invention provides a mechanism for processing and discharging tail gas from a sludge drying machine. The tail gas generated from sludge anhydration is subjected to dedusting, spraying and biofiltration treatment. The mechanism employs a charcoal substrate for culturing a microbe filter material, the adsorptivity of the tail gas is enhanced through the micropores of charcoal, firm degree of microbe adhesion is enhanced; a centrifugal rotation structure is arranged, so that filter residues accumulated on the filter material can be timely and effectively cleaned, service life of the filter material is prolonged, purifying efficiency is increased, spraying and fluid supplement are carried out on the filter material, so that the appropriate humidity, the pH value and the nutrition component can be kept, a filter material percolate is recovered and filtered, the components are adjusted and circularly sprayed, pollution in the percolate is removed, and the pH value and the component proportion of the supplement fluid are effectively controlled.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a tail gas treatment and discharge mechanism of a sludge dryer. Background technique [0002] Sludge is an important pollution output formed in industrial and agricultural production and urban life. will produce sludge. Sludge contains a large number of harmful microorganisms, heavy metals and organic pollutants. If not properly disposed of, it will have a serious negative impact on the natural environment and people's health. [0003] Sludge incineration is to make the combustible substances in sludge burn at high temperature and make them oxidatively decompose, so as to achieve the purpose of reducing sludge capacity, killing harmful microorganisms, removing toxicity and making full use of energy. Sludge incineration is a widely used and mature sludge high-temperature treatment technology in foreign countries. It can minimize the volume of sludge, and has the advanta...

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Problems solved by technology

[0009] The problem brought by the existing biological treatment method is that the adsorbed organic compounds in the tail gas and the dead microorganisms in the filter material will be converted into filter residues, which will block the micropores of the filter material, affect the gas permeability, and reduce the adsorption capacity. Therefore, the service life of the microbial filter material is shortened and needs to be replaced frequently; in addition, the function of the filter material depends on maintaining the activity of the microorganisms, so it is necessary to provide appropriate humidity and nutrients for the microorganisms. In the existing technology, a nozzle is installed in the filter tower, relying on spraying to replenish water and nutrients for the microorganisms in the filter material and to adjust the pH value. However, because the spray solution is used repeatedly, its composition is difficult to control, and it is also easy to be affected by the filter material. Contamination by accumulated filter residue and raffinate

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