Sleeve kiln exhaust gas flue ash discharge system and control method thereof

Abstract

The invention provides a sleeve kiln exhaust gas flue ash discharge system and a control method thereof. The sleeve kiln exhaust gas flue ash discharge system comprises a level gauge, a rotary feeding valve, a pipe-type screw conveyer and a finished product system. The level gauge is arranged in a kiln body exhaust gas pipe; one end of the rotary feeding valve is connected with the kiln body exhaust gas pipe, and the other end of the rotary feeding valve is connected with the pipe-type screw conveyer; the finished product system comprises a belt conveyer, a vibrating screen and an ash storage bin, and one end of the belt conveyer is arranged at an outlet of the pipe-type screw conveyer; an inlet of the vibrating screen is arranged at the position of an outlet of the belt conveyer; the ash storage bin is arranged at the position of an outlet of the vibrating screen. The sleeve kiln exhaust gas flue ash discharge system further comprises an instrument cabinet, a PLC cabinet and an HMI, and the PLC cabinet is connected with the instrument cabinet and the HMI. When accumulated ash in a waste gas flue reaches a value at which ash needs to be discharged, the level gauge sends out a signal, the accumulated ash is conveyed to the ash storage bin through the rotary feeding valve and the pipe-type screw conveyer, therefore, it is guaranteed that the flue is kept smooth at any time, normal negative pressure in a sleeve kiln can be guaranteed, and meanwhile safe and environment-friendly production can be guaranteed.

Description

technical field [0001] The invention relates to the field of ash discharge of a sleeve kiln, in particular to an ash discharge system and a control method for a sleeve kiln waste gas flue. Background technique [0002] At present, the exhaust gas in the sleeve kiln is discharged through the exhaust flue through the strong suction generated by the high-temperature exhaust fan. During the process of absorbing the exhaust gas, due to the action of gravity, the dust in the exhaust gas will gradually settle at the bottom of the exhaust flue, which is easy to cause the sleeve kiln The exhaust gas flue is blocked, so that the suction of the fan cannot be fully exerted, resulting in the inability to form a negative pressure in the sleeve kiln and the increase of the load of the fan motor, which will consume electric energy and seriously affect production, and even cause wind shutdown and stop production. In the traditional method of manual opening for dust removal, due to the lack o...

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Problems solved by technology

[0002] At present, the exhaust gas in the sleeve kiln is discharged through the exhaust flue through the strong suction generated by the high-temperature exhaust fan. During the process of absorbing the exhaust gas, due to the action of gravity, the dust in the exhaust gas will gradually settle at the bottom of the exhaust flue, which is easy to cause the sleeve kiln The exhaust gas flue is blocked, so that the suction of the fan cannot be fully exerted, resulting in the inability to form a negative pressure in the sleeve kiln and the increase of the load of the fan motor, which will consume electric energy and seriously affect production, and even cause wind shutdown to stop production

In the traditional method of cleaning dust by manual opening, due to the lack of understanding of the degree of dust accumulation, the dust will not be cleaned in time, resulting in blockage; or there is only a small amount of dust accumulation after opening the hole that does not need to be cleaned

At the same time, manual hole cleaning needs to be carried out in a shutdown state, and a large number of laborers and transport vehicles are required. Due to the open operation during the cleaning process, secondary dust will inevitably be caused, which will seriously pollute the surrounding environment.

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