Flue gas rapid cut-off device for coal charging cars and operating method of flue gas rapid cut-off device

Abstract

The invention relates to a flue gas rapid cut-off device for coal charging cars. The flue gas rapid cut-off device comprises a first dedusting pipeline which is communicated with a coal charging car, a second dedusting pipeling which is communicated with a main dedusting pipeline, and a drive unit. The first dedusting pipeline is vertical to the second dedusting pipeline, and the first dedusting pipeline and the second dedusting pipeline are communicated; an end of the first dedusting pipeline is provided with a diffusing cover; a flue gas cut-off damper is arranged on a pipe wall in the second dedusting pipline, wherein the pipe wall is vertical to the first dedusting pipeline; and the diffusing cover and the flue gas cut-off damper are linkedly connected by the drive unit. A driving telescopic hydraulic cylinder and a solenoid valve are employed in the flue gas rapid cut-off device to increase security and stability of dedusting systems; to ensure that a dedusting secondary pipeline is unblocked under normal circumstances; and to cut off the dedusting secondary pipeline rapidly by the flue gas cut-off damper under emergency circumstances. When regular production is required, the solenoid valve is provided with electricity, and then the flue gas cut-off damper and the diffusing cover are reset by a push rod of the driving telescopic hydraulic cylinder, so that production requirements are met.

Description

technical field [0001] The invention relates to a quick cut-off device for flue gas of a coal loading vehicle and a working method thereof, and belongs to the technical field of safe emission of flue gas from top-loaded coke ovens. technical background [0002] In the coking production of top-loading coal coke ovens, a large amount of flue gas will be generated when the coal loading truck performs top-loading coal operations. Out, through the dust removal pipeline arranged near the coal charging port, under the action of the suction of the dust removal fan, the branch pipes converge to the primary main pipe for coal charging and dust removal. The top of the primary main pipe is a three-way structure. During normal operation, the top vent cover is closed. The flue gas passes through the secondary main pipe through the dust removal guide sleeve of the coal loading truck and enters the dust removal main pipe. Finally, it enters the dust collector for filtration, and the exhaust...

AI Technical Summary

Problems solved by technology

In the process of practical application, it was found that the pressure stored in the accumulator cannot even complete the reset action of the inner casing, the outer casing, and the furnace cover, so it is impossible to effectively cut off the flue gas

When the dust removal fan fails and trips or cannot reach the high speed state, the coal loading truck does not have any protective operation on the dust removal system

In the above two emergencies, a large amount of smoke will be concentrated in the main pipe of dust removal, the second pipe and the main pipe of dust removal. If the mixed air reaches the limit of smoke explosion at this time, it will cause a violent explosion, which is extremely harmful.

[0004] At present, there is no effective way to avoid the explosion of dust collection pipeline in emergency

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