Efficient self-cleaning anti-blocking and anti-abrasion ash conveying system and method

Abstract

According to the efficient self-cleaning anti-blocking and anti-abrasion ash conveying system and method, an economizer ash hopper is arranged at the bottom of an economizer outlet flue, fly ash carried by flue gas in the economizer outlet flue falls into the economizer ash hopper, a low material level meter and a high material level meter are arranged in the economizer ash hopper, intermittent ash conveying is achieved, and meanwhile the ash conveying efficiency is improved. The operation state of the ash conveying system can be monitored in real time, blockage is prevented, when fly ash is accumulated to a certain height, the pneumatic switch valve is opened, the fly ash can flow out of the ash conveying pipe, the pneumatic switch valve is intermittently opened and closed, and the abrasion problem caused by long-term continuous ash conveying of the ash conveying pipe can be relieved; compressed air and high-pressure water can be used for dredging and flushing the ash conveying pipe, so that the cleaning degree is effectively improved.

Description

technical field [0001] The invention belongs to the field of flue gas environmental protection, in particular to an efficient self-cleaning, anti-blocking, anti-wear and ash conveying system and method. Background technique [0002] Existing SCR denitration devices in thermal power plants are generally equipped with economizer ash hoppers and denitrification ash hoppers. The pneumatic ash conveying effect of the silo pump is good, but the structure is complex, the cost is high, and there are certain requirements for the installation space. The air lock generally uses a rotary air lock for ash conveying, which has a simple structure and low price. However, when used for a long time, the rotating parts in the air lock and the ash conveying pipe will have serious wear problems. When the gas device is worn, the problem of "running air" will occur again; if the ash conveying pipeline is long and the installation angle is too small, the pipeline blockage problem will easily occur...

AI Technical Summary

Problems solved by technology

The pneumatic ash conveying effect of the warehouse pump is better, but the structure is complicated, the cost is high, and there are certain requirements for the installation space

The ash conveying of the air lock generally adopts the rotary air lock, which has a simple structure and low price, but the rotating parts and the ash conveying pipe in the air lock will have serious wear problems during long-term use. When the air device is worn out, the problem of "running wind" will appear again; if the ash conveying pipeline is long and the installation angle is too small, the problem of pipeline blockage will easily occur, affecting the effect of ash conveying, and there is a lack of necessary clogging monitoring and online dredging means

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