On-line prediction method and early warning and control system of dioxin in domestic waste incineration

Abstract

The invention provides an online prediction method and an early warning and control system for dioxin generated during household waste incineration. The online prediction method comprises the following steps that composition of waste into a furnace, parameters of the furnace, temperature of the furnace, flue gas flow, flue gas staying time, a content of carbon monoxide in the flue gas and a content of oxygen in the flue gas are used as an analysis data source for generation of the dioxin, and staying time of the flue gas in a low-temperature section synthesis zone is combined, an emission reference value of the dioxin is converted; meanwhile, the amount of potential dioxin which stays on a pipe wall and is induced by factors of the soot blowing process and flue gas disturbance is considered to be served as an influence factor, the emission reference value and the influence factor of the dioxin are subjected to weighted integration according to the analysis data source, and a generationopportunity value of the dioxin is analyzed and calculated; and the generation opportunity value of the dioxin is corrected to obtain an online monitoring value of the dioxin. According to the technical scheme of the online prediction method, a dioxin generation trend is predicted and calculated, online early warning and control of the dioxin are realized, and pollution to environment is greatlyreduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an online prediction method and an early warning and control system for dioxin in domestic waste incineration. Background technique [0002] Dioxins are a general term for polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), which are chlorinated tricyclic aromatic compounds. There are 75 kinds of PCDDs and 135 kinds of PCDFs due to the different substitution numbers and positions of chlorine atoms. Among them, 17 kinds of dioxins (the 2, 3, 7, and 8 positions are all replaced by chlorine atoms) are considered to be very harmful to the ecological environment and human health. Its harmfulness is mainly manifested in the following aspects: toxicity, persistence, easy accumulation in organisms, long-distance migration and deposition, and damage to the environment and human body near the source. Dioxins in the environment...

AI Technical Summary

Problems solved by technology

The emission concentration of dioxin-like substances produced by waste incineration plants is very low. At present, it can only be analyzed and tested through offline laboratory sampling, and online monitoring cannot be carried out. Environmental protection departments and operating companies cannot perform real-time monitoring or early warning of the waste incineration system in operation. , can only prevent the occurrence of dioxin exceeding the standard through manual experience operation and post-operation remedial measures after exceeding the standard

If the generation trend of dioxins can be monitored or warned online, so as to control them, it can greatly reduce the chance of excessive dioxin emissions, and avoid serious economic losses and social adverse effects caused by environmental assessment and punishment due to excessive flue gas. The incineration industry has not made substantial progress in the on-line dioxin early warning and control technology for waste incineration

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