Stabilizing and curing processing system and processing system for fly ash by waste incineration

Abstract

The invention relates to a stabilizing and curing processing system and processing method for fly ash by waste incineration. The processing system comprises a fly ash metering unit, a cement meteringunit, a chelating agent metering unit, a detection and adding control unit and a stabilization unit, wherein the fly ash metering unit, the cement metering unit and the chelating agent metering unit communicate with the stabilization unit; and the detection and adding control unit comprises an on-line detection module and a control module. According to the system, the online detection module is adopted, so that the content of elements in each batch of fly ash can be detected in real time, the physical and chemical characteristics of each batch of fly ash are accurately mastered, and the stabilization and solidification treatment of the fly ash is facilitated; and in addition, the adding amount of cement and chelating agent is precisely adjusted and controlled according to the physical andchemical characteristics of each batch of fly ash, the treatment effect of the fly ash stabilization curing can be greatly improved, and the requirements of environmental protection standards can be met after the fly ash treatment is ensured.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to a stabilization and solidification treatment system for waste incineration fly ash. Background technique [0002] According to statistics in July 2018, 359 waste incineration power plants have been put into operation across the country, with an annual waste disposal capacity of more than 105 million tons, and the output of waste incineration fly ash has reached 3.2 million tons. According to national policies and standards, waste Incineration fly ash is a hazardous waste, and it needs to be stabilized and solidified to meet the relevant standards before it can be landfilled in domestic waste landfills. However, due to the insufficient capacity of landfill facilities, high cost of standardized disposal, lack of attention to enterprise operation, and serious disconnection of supervision, etc., there are many illegal phenomena such as non-standard disposal of waste in...

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Problems solved by technology

[0003] Patent CN201810067499.6 discloses a method for quantitatively determining the content of various heavy metals in fly ash using XRF instruments; Real-time detection of the total amount of Pb in the fly ash is carried out. According to the total amount of Pb in the fly ash, it is divided into five grades A1-A5, and the addition ratio of different chelating agents for the five grades M1-M5 is determined, and the fly ash is stabilized and solidified through logical comparison. The refined dosing of the mixture does not consider the influence of Cd, Ca, Zn and other elements in the fly ash on the effect of the fly ash stabilization treatment, and does not establish a related function model, which has great limitations in guiding the addition ratio of the chelating agent The invention patent of application number CN106862235A discloses a harmless treatment method for on-line detection of heavy metal solid waste, but this patent cannot directly monitor the heavy metal content in the solid, and needs to monitor the heavy metal ion content in the aqueous phase solution after leaching. Complicated water leaching or acid leaching pretreatment process is required, and automatic control is not realized

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