Most ash conveying pipelines in thermal power plants adopt pneumatic conveying, which has the characteristics of high airflow pressure, fast flow rate and long conveying time. There are often hard particles when conveying materials, which seriously wear the ash conveying pipelines. Ash pipeline wear will not only cause serious coal powder leakage, pollution of the environment, but also safety risks, waste of materials, so solving the ash pipeline wear problem has been the focus of attention of many power plants.
There are three common solutions:
Reduce the airflow pressure when conveying ash: this can save energy and reduce the flow rate of materials at the same time, so as to reduce the effect of pipeline wear. However, this method treats the symptoms rather than the root cause, and the ash transport efficiency is sacrificed, and the pipeline life extension is also very limited, the effect is poor.
Patch and make square boxes around the pipeline: This method is to make square boxes in the parts of the ash pipeline that have been worn or may be worn, and then fill them with cement or wear-resistant materials. The advantage is that the operation is simple and the cost is low, the disadvantage is that it can only solve the local problem, and has a certain lag, can not solve the problem fundamentally.
3. Use wear-resistant ceramic pipe: Optimizing the material of the pipe and improving the wear-resistant ability of the pipe itself is an effective way to solve the wear of ash pipe, and wear-resistant ceramic pipe is a consistent choice made after the comparison of many thermal power plants.
