Pressure-equalizing coal gas dust removal and recovery device for blast furnace charging bucket

Abstract

The invention relates to a pressure-equalizing coal gas dust removal and recovery device for a blast furnace charging bucket, which is invented for overcoming the technical defects of the existing bag dust removal and recovery and cyclone and washing dust removal and recovery. The device comprises a blast furnace charging bucket and a coal gas pipe network, and is characterized in that a venturi tube dust remover and a dehydrator are connected between the blast furnace charging bucket and the coal gas pipe network through a coal gas pipeline, and a clean coal gas pipeline above the dehydrator is connected to the coal gas pipe network through an ejector and a clean coal gas conveying pipeline; a water spray nozzle in the venturi tube dust remover is directly communicated with a water supply device through a water supply pipeline; the ejector is connected with a high-pressure clean gas pipe network through a high-pressure clean gas pipeline. The device can completely recover the pressure-equalizing gas of the blast furnace, is not limited by the gas temperature, and is simple in structure, easy to implement and convenient to operate. The device can replace dust removers such as cloth bags and cyclone dust removers and washing dust removers, and can be widely applied to the technical field of pressure-equalizing coal gas recovery of blast furnace charging buckets.

Description

Technical field: [0001] The invention belongs to the technical field of blast furnace charging tank pressure equalization gas recovery, and in particular relates to a blast furnace charging tank pressure equalization gas dust removal and recovery device. Background technique: [0002] The gas pressure at the top of the modern blast furnace is high, and the receiving hopper of the charging equipment must equalize the pressure of the tank before charging the tank. The so-called tank pressure equalization refers to the process of discharging the gas in the tank before charging the tank of the top charging equipment of the blast furnace, and the gas equalization equipment used is a pressure equalization relief valve. The exhausted gas is traditionally discharged directly into the atmosphere, so it is also called release. However, because the gas in the material tank contains a large amount of toxic substances such as smoke and CO, which will seriously pollute the environment, a...

AI Technical Summary

Problems solved by technology

The obvious defects of this blast furnace top pressure equalization gas recovery device and process are: due to the pressure of the clean gas pipe network, it cannot be fully recovered; moreover, when the temperature of the gas is lower than the dew point, the bag filter cannot work normally

Compared with the previous patent, this patent is also for converting blast furnace top equal pressure gas into clean gas recovery, and its recovery process is too complicated, so it is not easy to popularize and apply

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