Abstract: Three ash content online measuring devices based on different principle and two moisture measuring devices based on different principle for coal were introduced. Based on this, the theory of online detecting device of coal was expounded; the concept of integrated device of sampling and online detecting for asreceived coal was put forward and realized in engineering practice. By using the new integrated device, the economical benefit of power plants can be enhanced effectively.

Key words: integrated device of sampling and on-line detecting for as-received coal, coal grade, ash content, moisture, on-line analysis