High-temperature smoke third-incineration and waste heat utilization all-in-one device for SRL furnace

Abstract

The invention discloses a high-temperature smoke third-incineration and waste heat utilization all-in-one device for a SRL furnace. The high-temperature smoke third-incineration and waste heat utilization all-in-one device for the SRL furnace comprises a cavity. The cavity is formed by splicing membrane type water cooled walls. A boiler drum is arranged on the upper side of the cavity. The bottomof the cavity is provided with a water cooled ash hopper. The bottom of the water cooled ash hopper is provided with a chain ash discharge device. A combustion chamber and a smoke discharge area are formed in the cavity. The side wall of the combustion chamber is provided with a smoke inlet, an oil-contained waste water spray gun, an anti-explosion door and an air inlet door. Partition plates arearranged in the smoke discharge area in a vertically staggered manner. A smoke channel is formed among the partition plates. One end of the smoke channel communicates with the combustion chamber. Theother end of the smoke channel is provided with a smoke outlet. By the adoption of the high-temperature smoke third-incineration and waste heat utilization all-in-one device for the SRL furnace, on one hand, smoke can be fully combusted, so that the excess air ratio and the smoke amount can be greatly lowered, and it is ensured that toxic and harmful substances in the smoke are completely incinerated or decomposed; on the other hand, the overall structure of the high-temperature smoke third-incineration and waste heat utilization all-in-one device for the SRL furnace is simple and reliable, small in occupation area and can effectively improve the waste heat recovery efficiency.

Description

technical field [0001] The invention relates to the technical field of hazardous waste disposal, in particular to an integrated device for tertiary incineration and waste heat utilization of high-temperature flue gas of an SRL furnace. Background technique [0002] The flue gas temperature at the outlet of a traditional incineration device is generally controlled at around 850-900°C. The uncombusted high-temperature flue gas is fully combusted in the second combustion chamber with the addition of an external heat source, and most of the dioxins produced during the incineration process are decomposed. , the high-temperature flue gas after combustion is utilized by the waste heat of the waste heat boiler. [0003] Although this combustion method can burn out the combustibles in the flue gas very well, the oxygen content of the flue gas is high, the utilization rate of the combustion air is not high, and the air excess coefficient is relatively large. A large air excess coeffic...

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Problems solved by technology

[0003] Although this combustion method can burn out the combustibles in the flue gas very well, the oxygen content of the flue gas is high, the utilization rate of the combustion air is not high, and the air excess coefficient is relatively large. A large air excess coefficient will not only produce a large The amount of flue gas will increase the burden on the system; and the high oxygen content of the flue gas is not conducive to the re-synthesis control of dioxins; moreover, the excessively high oxygen content of the flue gas will also have a negative impact on the conversion of various emission indicators

[0004] In addition, when installing a general boiler, a thick furnace wall needs to be erected next to the boiler, and heavy refractory materials need to be erected on the furnace wall. The installation cost and complexity are relatively high, and the floor area is large.

In addition, there are gaps between the existing water-cooled wall tubes, and the sealing is not good. The heat radiation of the boiler will directly pass through the gaps between the water-cooled wall tubes, and part of the heat radiation is absorbed by the furnace wall and refractory materials, resulting in Large heat storage and large heat loss

[0005] Furthermore, the hazardous waste is burned twice in the SRL furnace to produce high-temperature flue gas at 1300°C. The chlorine-containing compounds in the flue gas can corrode general metals under high temperature conditions, and general boilers have relatively high furnace temperature. wall temperature, so the furnace wall is easily corroded by flue gas

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