Smoke purifier of domestic refuse incinerator

Abstract

This invention is a kind of smoke purifier device of domestic garbage incinerator. The system is arranged with lime dry powder and water spraying, lime slurry spraying and active carbon spraying devices to automatically start and adjust spraying to eliminate the acidic gas, toxic gas and dust. This invention includes smoke inlet opening, slag tap, lime dry powder ejector, reaction tower at smoke outlet, pre-dust remover, bag-type dust remover and draught fan. The reaction tower is also arranged with ejectors for water, slurry and atomized air. The active carbon mixer, thermocouple and acidic gas detector are arranged in front of the bag-type dust remover. This invention has little operation failure.

Description

technical field [0001] The invention relates to a flue gas purification device for removing acid gases such as HCL, SOx, HF, toxic gas dioxins and dust in the flue gas produced by domestic garbage incineration, especially a kind of flue gas purification device which is equipped with a separate dry lime powder and Water injection system, lime slurry injection system and activated carbon injection system to realize the dual-purpose semi-dry dry powder and water injection system and / or lime slurry injection system that can be automatically activated and adjusted according to the flue gas temperature, flow rate and acid gas content. The flue gas purification device of the domestic waste incinerator. Background technique [0002] As we all know, the smoke of ordinary coal-fired boilers must be purified before being discharged into the atmosphere because it contains harmful gases such as incompletely burned carbon monoxide and sulfur dioxide and fly ash; There are many items, esp...

AI Technical Summary

Problems solved by technology

This patent provides a valuable theory on the temperature range of adding sodium-alkali modified lime in the flue gas area of ​​the waste incinerator to reduce the synthesis of dioxins, but the purification devices including sealed feeding devices and cyclone dust collectors are used , there are still the problems of the aforementioned existing flue gas purification devices: the neutralizer is required to have high quality and high concentration, and the circulating fly ash cannot be used, so its operating cost is high; at the same time, when the load changes greatly, the adjustment is more troublesome

However, when it is used to purify domestic waste incinerator smoke, it will cause frequent load fluctuations, large fluctuations, and poisonous gas due to the wide variety and uncertainty of the waste content, so the following problems will occur: 1) Due to the single variety of neutralizing agent, it is difficult to adjust the load fluctuation, so the purification effect is affected; 2) when lime dry powder is used as neutralizing agent, the consumption is large due to the low utilization rate of neutralizing agent; 3) due to water and The ratio of ash is difficult to control and it is easy to cause blockage, so the failure rate of the system is high; 4) It cannot remove toxic gases such as dioxin

In particular, it cannot adjust the amount of returned materials and the amount of neutralizing agent in time with changes in flue gas flow, inlet flue gas temperature, and acidic components in the flue gas; for example, when the flue gas temperature is low and the acid gas content is high, it is To protect the safe operation of the bag and the service life of the bag, the temperature of the flue gas before entering the bag filter should be controlled above the dew point and the amount of water spray should not be too large, but the amount of lime must be increased due to the low moisture content of the lime. On the contrary, when the flue gas temperature is high and the acid gas content in the flue gas is low, in order to ensure the normal operation of the bag and the moisture content of the neutralizer, the amount of water spray should be increased, but this will bring It is difficult to control the proportion of water and lime, so that the return pipe is blocked due to too much water, and the bag is glued.

In addition, it cannot be adjusted automatically. For example, the purification process cannot randomly adjust the amount of neutralizer and water according to the temperature of flue gas and the content of acid gas, resulting in unstable desulfurization efficiency, excessive neutralizer, and even increased viscosity due to fly ash However, it is difficult to carry out the dust removal process, the environmental protection requirements cannot be met, and the service life of the bag filter is reduced.

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