Pneumatic conveying blocked pipe automatic cleaning and blowing method

Abstract

The invention discloses a pneumatic conveying blocked pipe automatic cleaning and blowing method which specifically comprises the following steps that A, an ash cleaning system is established, B, an empty pipe pressure value is obtained, C, state values are set and triggered, and the state values comprise a safety value and a blocked pipe value; the safety value is equal to the sum of the empty pipe pressure value and the safety fluctuation value, the pipe blocking value is obtained through an actual pipe blocking test or is a theoretical value, and the theoretical value is lower than the safety value of the compressed air supply system and the pipeline pressure resistance value; after one ash discharging period is completed, the pressure value obtained by the pressure monitor is smaller than or equal to the safety value, and the next ash discharging period can be smoothly entered in a delayed mode; after one ash discharging period is completed, the pressure value obtained by the pressure monitor is larger than the safety value, the compressed air supply system continuously conducts air supply pneumatic conveying, and when the pressure value reaches the pipe blocking value, an alarm is given to remind manual unblocking; according to the pneumatic conveying pipe blockage automatic cleaning and blowing method, the phenomenon of continuous pipe blockage caused by untimely discovery is avoided through pressure monitoring, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a dust-removing and ash-unloading conveying method, in particular to a method for automatic cleaning and blowing of blocked pipes of pneumatic conveying, and belongs to the technical field of pneumatic ash conveying. Background technique [0002] The dust removal and ash discharge system of lime kiln body is to transport lime powder or lime particles into the lime powder fabric silo through a closed pipeline through compressed air; After 240 seconds, the next cycle will be carried out. When the ash discharge valve is opened, due to the large amount of ash and other reasons in the process of pneumatic ash conveying, the lime powder is not completely sent out in this cycle, and the next cycle will be carried out. If the operator does not timely If it is found, it will cause pipe blockage, and the more blocked it is, the more severe it will be, affecting normal production. SUMMARY OF THE INVENTION [0003] In order to solve the...

AI Technical Summary

Problems solved by technology

[0002] The lime kiln body dust removal and ash unloading system uses compressed air to transport lime powder or lime particles to the lime powder fabric bin through a closed pipeline; the delivery step is to open the ash unloading valve for 3-8 seconds and then close it, then open the compressed air valve, 180- The next cycle starts after 240 seconds. When the ash unloading valve is opened, the lime powder is not completely sent out in this cycle due to reasons such as a large amount of ash often appear in the process of pneumatic ash conveying, and the next cycle will be carried out. If it is found, it will cause blockage, and the blockage will become more severe, affecting normal production

Images