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Process Tech 3 > Test 3 > Flashcards

Test 3 Flashcards

1
Q

What is it called if it comes out of the top?

A

Puking a column.

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2
Q

What is multi-component distillation?

A

Seperating more than 2 things.

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3
Q

Who are the only people allowed in and out of the MCC?

A

Electricians

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4
Q

What are the different types of filling that we can have in a distillation tower?

A
  • 3 types of trays
    1. Sieve Tray
    2. Bubble Cap
    3. Valve Trey
  • 2 types of packing​
  1. Random
  2. Structured (honeycomb) ​

**All of these are used to create more surface area

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5
Q

What are the two types of backup power and what are they used for?

A
  • Co-Gen
    • goes into electrical supply system
    • mostly used as an eletrical supply but is able to take over if needed.
  • UPS (Uninterruptible Power Supply)
    • used on critical instrumentation
    • allows you to shut down plant safely in event of black out.
    • (battery pack)
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6
Q

whats the purpose of reflux?

A

Over-head purity and a temp. regulation

Can help cool tower

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7
Q

What do we put into a flare to help prevent black smoke and help have complete combustion?

A

Steam

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8
Q

What is a saftey valve?

A

USed for gases and reacts quickly.

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9
Q

3 ways heat can be transfered?

A
  1. Conduction- through a solid
  2. Convection - through movement of liquid or fluid.
  3. Radiation - through the air (waves).
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10
Q

Why do we want intimate contact?

A

For heat transfer.

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11
Q

What is the purposed of monitoring process far off, waht are we looking for?

A

Black smoke which indicates incomplete combustion

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12
Q

What is the difference between hot and cold relief?

A

Hot - Above 32 degrees F

Cold - Below 32 degrees F

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13
Q

Reciever

A

takes the liquid portion for refrigeration

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14
Q

Where does the cooling come from?

A

The metering device/

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15
Q

What does explosion proof mean?

A

it is meant to contain an internal explosion and keep it to that specific piece of equipment.

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16
Q

Purpose of Vaccum Distillation?

A

Decresing the pressure and causes boiling point to go down

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17
Q

At what voltage does energy come into the plant at?

A

13.8KB

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18
Q

What does preheater do?

A

takes feed and bottoms, preheats the feed

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19
Q

What happens if you have dry trays?

A

WIll not be as pure.

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20
Q

What is the purpose of the knockout drum?

A
  • Removes any liquids
  • Lquids are either sent to slop drum or another drum to be re-processed
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21
Q

What is flooding a column?

A

When it fills up with liquid

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22
Q

Defintion of Distillation?

A

Seperation based on boiling points.

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23
Q

What is a thermal oxodizer?

A

An incenterator.

Very high Temp furnace.

Used mostly to burn hazardous/biohazardous materials.

24
Q

What happens in a seal drum?

A

Full of water

Vapor inlet is submurged in water so that if teh flame lights up it wont go through water.

So it is sealed off.

25
Q

What can you tell me about the burners on the stack?

A
  • Pilot light is on 24/7 365
  • 2 cameras
  • 1 up close and 1 far off
    • 1 up close to monitor flare
    • 1 far off to monitor whole process
26
Q

What happens in extraction?

A

A 3rd component is introduced to 2 very similar boiling points and it dissolves and pulls one product from the other.

27
Q

How does a relief system work?

A

A valve is held in place with a spring, when pressure gets to a certain point it pushes srping and opens to relieve pressure.

28
Q

The metering device is also called what?

A

Thermostatic Expansion Valve.

29
Q

What does the flare burn?

Vapor or liquid?

A

VAPOR ONLY

30
Q

What is the differnce between a:

Refridgeration system-

Cooling water system-

A
  1. anything below ambient temerature
  2. only goes to ambient temp and has condensor
31
Q

Where is the flash zone?

A

Where the feed tray is located.

32
Q

What is a relief valve?

A

Used for liquids and reacts slowly

33
Q

What is the difference between

Continious?

Batch?

Distillation

A
  1. Continious means you add feed all of the time and continiously take off products
  2. Batch means you put some in, get it hot, have a vapor and liquid, and then you start all over.
34
Q

If reboiler starts firing and makes column too hot what will happen to prcoess?

What about too cold?

A

You will have some heavies that also vaporize with the lights.

called impure overhead

You will have impure bottoms

will have lights in bottoms

35
Q

What does intrinsically safe mean?

A

it means that it has a low enough voltage that it wont cause any problems, such as a spark.

36
Q

What is the name of the building that has the start and stop switches, fuses, and breakers?

A

Motor Control Center

37
Q

What is an arc flash?

A

Very high voltage short across components, can have very high pressures and temps.

38
Q

What is a fuse?

A

has to be changed, 1st line of defense, wire will burn if too much current is generated through it.

39
Q

What is the purpose of a relief system?

A

To relieve pressure.

40
Q

How long can we have black smoke?

A

6 min in 2 hours

41
Q

Metering Device

A

(where pressure drops)

this is where the change in state takes place

42
Q

Purpose of Reboiler?

A

it is a heat source for the tower

43
Q

What is the difference between

Mechanical System?

Absorbtion system?

A
  1. your refrigeration system, has a compressor
  2. your cooling towaer (water)
44
Q

Purpose of trays?

A

Causes more surface area which causes intimate contact between liquid and vapor

45
Q

What does “car sealing” a valve mean?

A

chaining a valve to stay open

46
Q

Azotrophic Distillation?

A

Seperating things that have very close boiling points.

47
Q

What is binary distillation?

A

Seperating only 2 components.

Over head and bottoms.

48
Q

Relief and saftey valves must be tested when?

A

Annualy.

49
Q

Heat flows from what to what?

A

High temp to Low temp

50
Q

What is a breaker?

A

Is for instant load change

If the Breaker trips it must be reset.

51
Q

suction drum

A

Draws liquid to start process over

52
Q

What is the purpose of pruge or sweet gas in a flare system?

A

To keep stuff swept out of system

To not allow oxygen to back into the system.

53
Q

Compressor

A

takes it to high pressure

(needs to be done in order to turn it back to liquid)

54
Q

What is the purpose of a vapor recovery unit?

A

taking vapor and bringing it back itno the system to be used.

55
Q

At what voltage does energy come in to be stepped down at?

A

between 100 and 160 KB

Process Tech 3 (3 decks)

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