Ch 14-17 Test Flashcards Preview

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Flashcards in Ch 14-17 Test Deck (49):
1

And furnace is made up of two pieces of equipment what are they called

Shell and tube heat exchanger and a chemical reactor

2

What is the purpose of the furnace

To heat up a process

3

What is combustion

The burning of carbon-based fuels under controlled conditions to generate key in order to do useful work

Furnaces and boilers

4

What is incarceration

The burning of material with the intent to destroy the material

Incarcerators and flayers

5

Heat released by combustion is called what and what is it measured in

Heat value and BTU

6

Complete combustion

Only CO2 and H2O remain

7

Incomplete combustion

Unburned fuel, CO2, and CEO and H2O remain. There is not enough oxygen

8

Combustion mode:

minimum excess 02 heated, wasting some energy

9

Lead////lag

Lead with oxygen lag with fuel

10

Typically bottom fired round flame burners in a single or double row is called what

Box heater

11

Similar to box heater

Cabin heater

12

Almost always bottom fired

Vertical cylinder heater

13

Special breaks called firebreak or special material is called what

Refractory

14

Ernest tubes that are supported on the walls

Radiant section

15

Furnace tubes that are supported on the roof

Convection section

16

What is it called when the burner flame touches the tubes or walls of the furnace

Flame impingement

17

When he causes metal to start failing and stretch this is the main cause of failure

Creep or sagging

18

Difference in density between outside air in firebox air create what

A natural draft movement

19

If he and pushes air into burners this is called what

Forced draft

20

Fan below stack pools air into firebox and out of stack

Induced draft

21

One fan induces flow out of the stack and one forces air into burners

Balanced draft

22

Before starting up a furnace you have to do what

Purge it

23

Extraction is what

The separation of two materials by contacting them with a third substance that will dissolve one of the substances but not the other

24

Solution

The feed a uniform mixture of molecular sized compounds. Particles in a solution are not chemically bonded and can be separated purely by physical changes.

25

Solute

Material that is dissolved into another material. The material to be dissolved in the solution and removed by extraction

26

Solvent

Chemical that will dissolve into another material

27

Extract

The new solution formed when he saw that dissolves the solute in now contains it

28

Raffinate

The feed solution minus the extracted solute. This is the product that had the other substance dissolved out and removed

29

What is the most common extraction system used

Liquid-liquid extraction

30

What are two types of extraction process it's

Watch extraction and continuous extraction

31

The simplest extraction in a single stage batch unit. Does not provide perfect separation.

Batch extraction

32

Concurrent flow


Mixed flow

Flows in the same direction


Mixed flows allow the substance to layer out and be removed

33

Feed insolvent are continuously at it while the raffinate and extract are continuously withdrawn

Continuous extraction

34

What are the two types of columns

Packed columns


Trayed columns.

35

Simplest and most commonly used

Pack columns. Hallow shell filled with packing

36

Bubble cap, sieve tray, baffle tray are examples of what

Trayed columns

37

An emulsion is what

Two chemicals that are different, that will not dissolve in each other, and will not to layer out

38

Saturation

Extract mixture contains the Maximum amount of solute

39

Interfaces

Must be established in the column to separate the extract and raffinate phases

40

Solvent to feed ratio

The amount of solvent in relation to the feed rate

41

The process or action by which one thing absorbs or is absorbed by another

Absorption

42

The process by which molecules of a substance collect on the surface of another substance. The molecules are attracted to the surface but do not enter the solids my new spaces as an absorption

Adsorption

43

What are for commonly used adsorbents

Desiccants, silica gel, activated alumina, activated carbon

44

Cation

If the molecule has lost an electron and it is positively charged

45

Anion

If the molecule has gained an electron and it is negatively charged

46

Adsorbents have to be what

Regenerated

47

Absorption, stripping and extraction are all what

Mass transfer operations

48

The chemical process in which one substance penetrate and is drawn into the bow of another substance

Absorption

49

Stripping is called what

Getting it out