Control questions on the topic “Methods of industrial gases cleaning”

1. Call the basic groups of devices of preliminary gas cleaning.

2. Explain a principle of action of gravitational chamber.

3. Which factor determines a fractional efficiency of dust precipitation chamber?

4. Call the basic advantages and lacks of gravitational chamber.

5. Explain a principle of action of inertial deduster.

6. Which kinds of inertial dedusters you know?

7. In which kind of dry dust removal equipment centrifugal forces are used?

8. Call three main problems in cyclone design.

9. Explain a principle of cyclone action.

10. Call the advantages of cyclones.

11. What is a multycyclone?

12. Which factor allows to raise the efficiency of gas cleaning by use of dry dust removal equipment?

13. What additional problem arises by use of wet dust removal equipment?

14. Call the main kinds of wet dust removal equipment.

15. Explain a principle of action of direct-flow cyclone with a water film.

16. In which case the maximum efficiency of gas cleaning is achieved by use of hollow gas washer? (a diameter of liquid drops, a rate of gas stream)

17. Centrifugal atomizers of rough pulverization are used in hollow gas washer. Call the main advantage of these atomizers.

18. Which kinds of low pressure Venturi scrubbers you know? Explain a principle of their action.

19. Call the kinds of fibres used in fibrous filters.

20. Explain a principle of action of modern filtering installations.

21. Explain a principle of action of electrostatic precipitators.

22. Where electrostatic precipitators are used?

23. What methods of removal of gaseous components from departing gases you know?

24. What is the absorption? In which installations a physical phenomenon of gas absorption by a liquid is applied?

25. Explain a design of packed column. Which types of packed column are there?

26. What is the adsorption? Call the field of application of this phenomenon.

27. What is the adsorbent? Call the basic three groups of adsorbents.

28. Which properties should possess adsorbents?

29. Call the most widespread non-polar adsorbent. Examples of it’s use.

30. Which polar adsorbents you know? Call the field of their application.

31. What is the chemosorption? Which kinds of adsorbing substances enter in chemical reaction with gas molecules? Give examples of such substances and call the field of their application.

32. Call the basic property of polluting substances which can be removed by burning?

33. Which types of oxidation processes you know?

34. Call the conditions of direct burning of gases.

35. Call the conditions of catalytic burning of gases.

36. What are the basic advantage and the basic lack of process of gas burning?