Considerations for safety facilities in dust feeding
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Question: 1. For the powder feeding into the reactor, a draft hood is used for dust removal; therefore, the risk of dust explosions is not considered. Are the motors of the reactor and the dust removal fan designed to be dust explosion-proof? 2. If electrical explosion protection is considered for Question 1, should electrical equipment be selected based on Zone 10 or Zone 11 criteria? 3. Can third-party testing institutions determine through testing whether a powder material is an explosive dust or a non-explosive dust? As the basis for the design
1. Using an exhaust hood for dust removal when feeding powder into the reactor can reduce dust concentration; however, the explosion-proof requirements of the motor still need to be taken into account to avoid potential risks. Therefore, it is recommended to choose explosion-proof motors. 2. For the selection of electrical explosion protection, Zone 10 or Zone 11 should be chosen based on the actual conditions. If an explosive environment may form, it is recommended to choose the Zone 10 standard. 3. Third-party testing institutions can determine the properties of powder materials through testing, including whether they are explosive dusts. Test results can serve as an important basis for design and safety measures. .