Conical ash control valve with automatic slag poking function

Abstract

The invention discloses a conical ash control valve with an automatic slag poking function. The conical ash control valve comprises a valve seat provided with a boiler slag removal opening and a valve body provided with an ash control valve discharging opening, and further comprises a valve rod and a slag poking rod, wherein the valve rod slidably penetrates through the valve body; the slag poking rod penetrates through the valve rod; the slag poking rod can move along the axis of the valve rod; the slag poking rod crushes blocky materials in the boiler slag removal opening through back-and-forth stretching; a compressed air channel is arranged in the slag poking rod; a plurality of purging holes communicated with the compressed air channel are arranged in the head of the slag poking rod; and compressed air purged out of the purging holes is used for enhancing the flowability of the crushed materials. The slag poking rod stretches back and forth to complete material stirring, ash accumulated at the boiler slag removal opening is loosened and separated or large slag blocks are broken, meanwhile, the slag poking rod sprays high-pressure gas through the purging holes to continuously purge broken ash near the boiler slag removal opening, the fluidity of the ash is enhanced, and the purpose of automatic slag poking is achieved.

Description

technical field [0001] The invention relates to the field of high-temperature ash valves, in particular to a conical ash control valve with automatic slag removal function. Background technique [0002] The development and application of circulating fluidized bed boiler technology has been widely used. This technology is one of the advanced technologies for clean coal combustion and sustainable development strategy. It integrates the advantages of energy saving, clean combustion, safety and reliability, and reduction of pollution emissions. However, in the actual operation of the boiler, some local structural problems will also affect the efficiency of the boiler. For example, due to frequent blockage of the slag outlet, the boiler slag discharge is gradually abnormal, which seriously affects the safe and economical operation of the boiler. [0003] At present, the way to dredge the ash (slag) outlet of the circulating fluidized bed boiler is mostly to install a slag-pierc...

AI Technical Summary

Problems solved by technology

Once the ash (slag) discharge port is blocked, the conventional way to unclog it is to organize personnel to use a slag removal bar to insert the slag removal inclined pipe into the boiler ash (slag) discharge port to manually remove the slag, and the labor intensity of the on-site operators is high.

Due to the slight positive pressure in the furnace of the circulating fluidized bed boiler, there is a risk of high-temperature ash leakage when poking slag, which may easily cause scald accidents and pose a major safety hazard

At the same time, when dredging through the slag-piercing inclined pipe, if the angle used is not suitable, the slag-piercing strip will act on the wear-resistant castable at the ash (slag) outlet of the boiler, which will increase the risk of the furnace wear-resistant castable falling off

In addition, it takes a long time from issuing the slag removal task to organizing personnel to complete the dredging of the ash (slag) outlet on site. In order to avoid damage to the ash (slag) outlet due to long-term blockage, it is usually necessary to stop the machine and wait for personnel to come in after the blockage. To dredge, thus affecting the normal use of the ash (slag) outlet

Images