Deodorizing ceramsite and preparation method thereof

Abstract

The invention discloses deodorization ceramsite and a preparation method thereof, and belongs to the technical field of waste gas treatment. The ceramsite comprises the following components: 10-20% of dry sludge, 20-30% of fly ash, 30-50% of bentonite, 10-20% of clay, 5-10% of a pore-forming agent and 5-10% of an alkaline substance. The preparation method comprises the following steps: firstly, uniformly mixing all the raw materials except the pore-forming agent, granulating, then uniformly mixing the raw material nodules subjected to primary granulation with the pore-forming agent and other raw materials again, granulating, and finally drying, preheating, roasting and cooling. The prepared ceramsite is rich in outer pores, growth of microorganisms is guaranteed, filler blockage caused by excessive breeding of the microorganisms can be avoided, meanwhile, the strength and corrosion resistance of the ceramsite can meet the use requirements of a deodorization filter tank, the ceramsite has an acidity buffering function, the odor removal effect is effectively guaranteed, the preparation process is simple, and the ceramsite is suitable for industrial production. The energy consumption is low, and the purpose of recycling resources is achieved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and more specifically relates to a deodorizing ceramsite and a preparation method thereof. Background technique [0002] With the development of social economy and the improvement of living standards, as well as the increasing awareness of the public environment, the odor as an auxiliary product of sewage plants and the corresponding odor treatment have attracted more and more attention. Due to its particularity, the urban sewage treatment system has the characteristics of complex and changeable components, toxic and harmful, significant dynamic load, continuous sewage discharge, and close to residential areas. The odor produced by it is often short-term and sudden, which is difficult to capture and collect. Collection also poses difficulties for governance. [0003] At present, the malodorous gas treatment technologies commonly used in sewage treatment plant engineering mainly inclu...

AI Technical Summary

Problems solved by technology

Inorganic fillers mainly include ceramsite, volcanic rock, etc., which are most commonly used because of their good physical properties and film-hanging effect, long service life and relatively cheap price; organic fillers mainly include bark, bamboo charcoal, etc., which can be Microorganisms provide organic matter as a nutrient source, and there is no need to add additional nutrients to microorganisms during operation, but the organic filler will rot in the biofilter, so its strength will decrease, and eventually the filter bed will be compacted, the air flow will be short-circuited, and the running resistance will increase. Composite filler, as the name suggests, is to install inorganic filler and organic filler in the biological filter tank at the same time. Although the composite filler combines the advantages of inorganic filler and organic filler, the inherent shortcomings of organic filler still restrict the economical efficiency and purification efficiency of the biological filter tower. Efficiency and service life

Although inorganic fillers are widely used, among the existing inorganic fillers, there is a lack of ceramsite or volcanic rock fillers for the field of deodorization, so there are difficult shortcomings in the actual use process:

[0005] (1) The relative density of building ceramsite is light, but the water absorption rate of general building ceramsite is small, so in the actual operation process, it is often necessary to continuously spray water to the filler to maintain the humidity of the filler

In addition, the roughness of the surface of building ceramsite is low, which is mainly internal pores, and microorganisms mainly grow inside the ceramsite, which reduces the removal efficiency of odor

[0006] (2) Volcanic rock has good water absorption performance, and its own strength and surface roughness are relatively large, so it is suitable as a carrier for microbial growth, but its relative density is relatively high, and the strength requirements for deodorization equipment are relatively high, resulting in high deodorization costs , and because the surface is too rough, after the deodorization equipment runs for a period of time, the biofilm on the surface of the volcanic rock will multiply rapidly, which will easily lead to plugging of the filler and affect the removal efficiency of the equipment

[0007] (3) The existing deodorizing fillers, whether it is ceramsite or volcanic rock, do not have the ability to self-adjust pH, so in the normal operation of the deodorizing system, it is necessary to add chemicals to the system to adjust the pH of the filler. The pH value is neutral, this method not only increases the operating cost, but also the dosage itself will affect the normal growth of microorganisms on the filler

[0008] (4) Conventional volcanic rock, building ceramsite and other fillers are not special fillers for deodorization. The shape of the product is irregular and the particle size varies greatly. It needs to be cleaned before use, which will affect the use effect

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