PDS efficient fly ash stabilizing system

Abstract

The invention discloses a PDS efficient fly ash stabilizing system which comprises a stirring device used for mixing raw materials; the stirring device is connected with a feeding system for feeding materials into the stirring device; the feeding system comprises a fly ash feeding system, a chelating agent feeding system, a water supply system and a retarder feeding system; the retarder feeding system is used for adding organic retarders into the stirring device, so as to guarantee that the discharged material of the stirring device is liquid slurry; the fly ash stabilizing system further comprises a filtering device which is connected with the stirring device and is used for dehydrating the liquid slurry formed by the raw materials after being stirred. The PDS efficient fly ash stabilizing system has the advantages: 1) the pollutant concentration of the product extract is reduced and the percent of pass of treated fly ash is improved; 2) the work environment is excellently improved; 3) the stirred product is liquid slurry and can be filtered; 4) the fly ash stabilizing system has a simple structure and using the conventional industrial equipment can meet the production requirements.

Description

technical field [0001] The invention relates to waste incineration fly ash treatment equipment, in particular to fly ash stabilization landfill treatment equipment. Background technique [0002] With the promotion of domestic waste incineration power generation technology in China's urban domestic waste treatment, the treatment and disposal of fly ash produced by waste incineration has become one of the important issues that plague people's production and life. [0003] The "National List of Hazardous Wastes" (2016 Edition) (hereinafter referred to as the "List") revised and issued by the Ministry of Environmental Protection, the National Development and Reform Commission, and the Ministry of Public Security will come into effect on August 1, 2016. Fly ash is not only included in the "List", but also included in the "Hazardous Waste Exemption Management List" of the "List". Chelation of fly ash opens up market space. [0004] The fly ash stabilization process refers to the...

AI Technical Summary

Problems solved by technology

[0007] The biggest problem with the current fly ash stabilization process is the low pass rate of detection, that is, it is difficult to meet the requirements of GB16889-2008 on the concentration limit of pollutants in the leachate of fly ash from domestic waste incineration after fly ash treatment, and the pass rate of detection is usually around 60%.

Secondly, a large amount of dust is likely to be generated during the production process, which makes the working environment on site extremely harsh and will corrode the equipment

In addition, since ammonia water or urea needs to be added in the flue gas treatment process after waste incineration, a large amount of ammonia in the fly ash will escape during the chelation and transportation process, resulting in a very strong ammonia smell in the fly ash curing workshop, which is harmful to the operation. Injuries to workers' eyes, skin, and respiratory organs

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