A sludge drying tail gas treatment device and method suitable for sludge treatment plants

Abstract

The invention relates to a sludge drying tail gas processing device and method for a sludge processing plant. The sludge drying tail gas processing device structurally comprises a drying device, a cyclone dust collector, an acid pickling tower, an alkaline tower, a biological filter and an induced draft fan, wherein the cyclone dust collector is connected with the air outlet of the drying device; the air outlet of the cyclone dust collector is successively connected with the acid pickling tower, the alkaline tower, the biological filter and the induced draft fan. The sludge drying tail gas processing device and the method provided by the invention have the advantages that sludge drying tail gas is processed by adopting an acid-alkali method and a biological method; reclaimed water in a sewage plant is utilized to replace an external water source of a system to serve as an absorption solvent, after bad smell is absorbed, part of the reclaimed water is returned to an absorption tower through a sewage processing system, part of the reclaimed water enters an anaerobic pool to increase the temperature of a reaction liquid in the anaerobic pool; the deodorization effect is good, water resources are saved, the comprehensive use ratio of the resource is improved, the operation cost is reduced, and the load of a self boiler is also reduced; the sludge drying tail gas processing device can be popularized and used in a large-scale manner.

Description

technical field [0001] The invention discloses a sludge drying tail gas treatment method suitable for sludge treatment plants, which is used for treating the tail gas after sludge drying. Background technique [0002] Common sewage treatment processes are mainly divided into three categories, including chemical methods (transformation process in which chemical substances are added to chemically react with pollutants in wastewater), physical methods (filtration, sedimentation, separation, flotation and centrifugation, etc.) and biological methods ( Use microorganisms to carry out oxidation-reduction reaction to remove pollutants), among which the investment cost and operating cost of physical method and chemical method are relatively high, and the treatment effect is not very good, which is easy to cause secondary pollution. The main process of urban sewage treatment generally adopts biological method . Common urban sewage treatment plant processes are: A 2 / O sewage treatm...

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Problems solved by technology

Using this method consumes a lot of water, and the waste liquid generated after absorption needs to be reprocessed, and there is a problem of secondary pollution, which requires the addition of sewage treatment devices, which increases the investment cost of equipment; the overall energy consumption is high, and the operation and maintenance costs are also high. , especially suitable for high-concentration odor; and the concentration of odor is constantly changing, and the operating process parameters lack means of adjustment and control, so it is difficult to ensure a stable treatment effect

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