In order to reduce the air and pulverized coal distribution deviation of pulverized coal system

optimize the boiler combustion condition and expand the application range of pulverized coal distributor

a new pulverized coal distributor needs to be developed. By means of test bench model test

a new type pulverized coal distributor is developed. The structural design of the distributor model is completed

and the key performance of the distribution is studied

such as the effects of the pulverized coal distributor's coal amount damper resistance characteristics

the air and pulverized coal distribution and regulating characteristics

and resistance regulation on the distribution characteristics

as well as the effect of system air speed on the distribution characteristics. The results of model test and engineering application show that

the new pulverized coal distributor can effectively control the air volume deviation of the pulverized coal delivery pipeline within ±5% and pulverized coal deviation within ±10%. After the engineering transformation and leveling test of the new pulverized coal distributor for No.3 boiler of a power plant

the thermal load deviation of furnace can be effectively reduced

and the deviation of the two metal wall temperature points

which can reach 150 ℃ before transformation

can be controlled within 15 ℃

which greatly improves the safety and reliability of the boiler operation. The development and engineering application of the new pulverized coal distributor have certain guidance and reference significance for reducing the distribution deviation of pulverized coal in pulverized coal system and solving the series of problems such as partial burning

over temperature and corrosion in boiler operation.