Energy saving device for cyclic utilization of smoke of open smoke hood type silicon submerged arc furnace

Abstract

The invention relates to an energy saving device for cyclic utilization of the smoke of an open smoke hood type silicon submerged arc furnace. According to the energy saving device for cyclic utilization of the smoke of the open smoke hood type silicon submerged arc furnace, a circulating draught fan, a smoke inlet pipeline, a smoke inlet pipeline valve, a smoke outlet pipeline and a smoke outlet pipeline valve are arranged between a smoke inlet and a smoke outlet of a heated surface quasi water heat utilization device such as a waste heat boiler or a waste heat draft furnace. Compared with an existing air mixing technology, the energy saving device for cyclic utilization of the smoke of the open smoke hood type silicon submerged arc furnace has the advantages that a larger amount of mixed smoke can be obtained, the waste heat utilization rate is increased, the power load of the draught fan used in cooperation with the open smoke hood type silicon submerged arc furnace can be lowered, and thus the effects of energy saving and emission reduction are achieved.

Description

Technical field: [0001] The invention relates to an energy-saving device for utilizing the waste heat of a submerged arc furnace, in particular to an energy-saving device for recycling flue gas of an open hood type silicon-based submerged arc furnace. Background technique: [0002] At present, during the production process of the open hood type silicon-based submerged arc furnace, a large amount of CO gas overflows from the surface of the material in the hood, and burns immediately when it encounters air. Silica powder and other dust (the main chemical component is silicon dioxide), which has strong cohesiveness when the flue gas is above 500 °C. For this reason, the existing open hood type silicon-based submerged arc furnace flue gas heating surface waste heat utilization devices, such as waste heat boilers and waste heat blast stoves, etc., all use the air in the atmosphere to mix the flue gas, so that the mixed flue gas The gas enters the heating surface waste heat utili...

AI Technical Summary

Problems solved by technology

There are serious disadvantages in the above-mentioned existing technical method: one is that a large amount of air is heated and discharged to cause a large amount of waste heat loss; the other is that a large amount of air will inevitably increase the load of the dust removal fan for the open hood type silicon-based submerged arc furnace, resulting in a large amount of energy consumption; Third, the air temperature and density are greatly affected by the four seasons of spring, summer, autumn and winter, and by regions such as east, west, north, south, etc., which seriously affect the utilization rate of waste heat

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