Ash-discharging and air-locking system for air cooling dry slag extractor

Abstract

The invention discloses an ash-discharging and air-locking system for an air cooling dry slag extractor, which comprises an air locking device, a driving mechanism, and a hopper which is hermetically communicated with a discharge end of the dry slag extractor. The hopper is communicated with two conveying channels of the dry slag extractor. The air-locking device is arranged on the hopper, and the driving mechanism is arranged outside the hopper and linked with the air-locking device. The hopper is internally provided with a segregation separator which divides a slag falling channel of the hopper into a first slag falling channel and a second slag falling channel that are independent. The first and the second slag falling channels are in one-to-one correspondence with a steel belt conveying deslagging channel and a cleaning chain de-ashing channel of the dry slag extractor respectively. The air-locking device is arranged at an outlet end of at least one slag falling channel of the first and the second slag falling channels. The air-locking device is controlled to open and close through the driving mechanism so as to discharge slag in corresponding slag falling channel and seal the slag falling channel, therefore, air fluid channeling is prevented, and accumulated ash below the cleaning chain of the slag extractor is avoided.

Description

technical field [0001] The invention relates to slagging equipment for boilers in thermal power plants, in particular to an automatic ash-releasing and air-locking system for preventing ash accumulation at the bottom of an air-cooled dry slag tapping machine and at the feeding opening of the head. Background technique [0002] The air-cooled dry slag machine is more and more widely used because of its heat energy recovery, water saving and small maintenance. The dry slag machine is connected with the boiler, and the pressure in the dry slag machine is less than outside air pressure. In the actual operation of the air-cooled dry slag machine, the air leakage phenomenon at the head is relatively serious, and the coal ash particles will enter another pressure range after being discharged from the internal pressure range of the dry slag machine. During this process, due to the air leakage at the discharge end , so that air channeling occurs inside the dry-type slag extractor, a...

AI Technical Summary

Problems solved by technology

Every time the air lock is opened, the negative pressure airflow blows back the coal ash on the bottom plate of the head of the dry slag machine, causing the coal ash to flow back, and the cleaning chain can only scrape out a small amount of coal ash. At the same time, A large part of the coal ash conveyed by the steel belt is sucked into the bottom plate under the cleaning chain at the head of the dry slag machine by the negative pressure airflow during the falling process, so that a large amount of coal ash accumulates on the bottom plate of the dry slag machine, and here The scraper driven by the cleaning chain cannot effectively scrape out the coal ash, and more and more ash accumulates, which affects the operation of the dry slag machine and cannot solve the ash accumulation on the bottom plate of the dry slag machine under the cleaning chain serious technical problem

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