Filtration and backwashing device, coal coke recovery device and filtration and backwashing method, gasification composite power generation equipment

Abstract

The present invention provides a filter backwashing device capable of recovering the dust-collecting performance of a filter and suppressing an increase in the number of times of backwashing, a coal char recovery device having the filter backwashing device, and a filter backwashing method. The filter backwashing device (94) has: a gas injection device (110), which is arranged on the downstream side of the element (108) in the flow direction of the circulating gas, and sprays backwashing gas from the downstream side towards the element (108); the parameter detection device (accumulation detection device (169) or differential pressure gauge (122 a , 122b)), which detects the parameters for judging the state of the dust attached to the element (108); and the control device (100), which estimates the thickness of the dust based on the detection results of the parameter detection device, and The interval of spraying backwash gas from the gas injection device (110) to backwash the element (108) is determined according to the thickness of the discharged dust.

Description

technical field [0001] The invention relates to a filtering and backwashing device for backwashing a filter element of a filtering device, a coal char recovery device having the filtering and backwashing device, a filtering and backwashing method, and gasification composite power generation equipment. Background technique [0002] As a device for removing dust contained in the circulating gas flowing through the pipe, it is known to arrange a filter element (hereinafter referred to as element) on the path where the circulating gas flows and to filter the dust contained in the circulating gas passing through the element. A filtering device that removes it by filtering. A facility including a device based on a porous filter as a filtering device is known as a facility including a gasification device. [0003] As a gasifier for gasifying carbonaceous solid fuels such as coal, there is known a carbonaceous fuel gasifier that supplies a carbonaceous solid fuel into a gasifier an...

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Problems solved by technology

[0004] If such a filter device is continuously used, the dust (substance) trapped in the element of the porous filter will accumulate, and the pressure loss of the filter device will increase, thereby reducing the performance.

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