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Control Room > Old Questions > Flashcards

Old Questions Flashcards

1
Q

The purpose of the hydrapulper system is to permit stock to leave the pulper tub when the correct material size has been reached

A

True

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2
Q

What are 3 major components of the hydrapulper system

A

Hydrapulper ragger scavenger

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3
Q

Steam is input to the ________

A

Hydrapulper

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4
Q

Cutting the baled OCC wire ______ the pulping time

A

Reduces

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5
Q

The hydrapulper produces _____

A

Pulp, and stock

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6
Q

Raising the temp of the stock ______ viscosity

A

Reduces

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7
Q

The pulper pump discharges the accepts stock from the pulper to the ____

A

Course cyclones

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8
Q

Course cyclones

A

Remove smaller, high density debris such as sand, staples, and glass

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9
Q

Course screens

A

Removes oversized, troublesome, and unwanted particles from the good fibers

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10
Q

What are 3 major components of the course cleaning and screening system

A

No. 2 course cyclones, dump chest, primary course screen

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11
Q

Stock enters the course cleaning and screening system from the _____

A

Pulper pump

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12
Q

The agitator on the dump chest helps prevent the fibers from combing

A

True

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13
Q

Gray water is added in the course screening stage for _____ control

A

Dilution and consistency

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14
Q

The cylinder on the course screens is also known as the basket

A

True

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15
Q

The primary course screen rejects flow to the ____

A

Float purger

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16
Q

Fine screens

A

Remove small contaminants from the stock based on their size and shape

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17
Q

Fine cyclones

A

Remove small contaminants from the stock based on their specific gravity

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18
Q

What are 3 major components of the fine cleaning and screening system

A

Secondary fine screen feed pump, fine cyclones, primary fine screens

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19
Q

Rejects from the fine cyclones go to the sand separator

A

True

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20
Q

Stock is pumped to the fine cyclones by the ______

A

Primary fine screen feed pump

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21
Q

The fine cyclones junk traps are flushed with water from they gray water HP dilution pump

A

True

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22
Q

Accepted stock passes out of the top of the fine cyclones to the inlet of the _____

A

No.1 primary fine screen and

No.2 primary fine screen

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23
Q

The forward cleaners reject heavy contaminates

A

True

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24
Q

There are _____ stand pipes in the forward cleaning system

A

1

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25
Q

There are _____ stages of forward cleaners

A

4

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26
Q

Accepts from the _____ are discharged to the disc thickner

A

Primary reverse cleaners

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27
Q

The acceptable fibers from the primary for cleaners are sent to the _____

A

Primary reverse cleaners

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28
Q

There are ___ standpipes in the reverse cleaning system

A

2

29
Q

There are ____ stages of the reverse cleaners

A

3

30
Q

The standpipes provide the necessary surge volume for the system

A

True

31
Q

3 purposes of the pulper and dispersion system are

A

To disperse any remaining inks, waxes, and plastics in the pulp to achieve a uniform distribution of impurities in the pulp
To attain the desired consistency of the dispersed pulp and send it to the high density storage chest for use in the top and bottom ply blend chests
To bypass some pulp around the dispersion system to achieve the desire throughput to the paper machine

32
Q

What are 3 major components of the thickener

A

Disc thickener
Disperser #1 bypass screw conveyor
Disperser #2 bypass screw conveyor

33
Q

What are 3 major components of the dispersion system

A

Plug screw
Screw presses
Preheater

34
Q

What are some outputs of the thickener and dispersion system

A

Medium consistency pulp to the high density chest
Cloudy filtrate to the gray water chest
Clear filtrate to the clear white water chest

35
Q

What the best way to describe how the thickener works?

A

Pulp and water draining through the filter discs form a pulp mat that eventually blocks most of the pulp but allows water to pass through

36
Q

What best describes the operation of the dispersion system

A

Thickened pulp is heated to soften impurities which are then distributed uniformly through out the pulp

37
Q

What’s the best way to describe the medium consistency system

A

Dispersed pulp is mixed with water to achieve the desired consistency and then pumped to the high density chest for storage

38
Q

What is the best way to describe the operation of the disperser bypass system

A

Thickened pulp is mixed with water to achieve the desired consistency and then pumped to the bottom ply blend chest for use in the paper machine

39
Q

What equipment is used to remove the plastics, wires, cords, etc. from the pulper

A

Ragger

40
Q

What major piece of equipment is the scavenger attached to

A

Hydrapulper

41
Q

The coarse and fine cyclones feed their rejects to the sand separator

A

True

42
Q

The reject sorters output rejected materials and fiber/water. Where is the fiber/water sent?

A

Screw presses

43
Q

What is a large holding tank that separates suspended solids in the water by sedimentation and floatation

A

DAF process clarifier

44
Q

The float purger is used to separate lighter and heavier components from the screen rejects

A

True

45
Q

The purpose of the white water system is to

A

Maximize the amount of fresh water brought into the mill, and maximize the discharge of pollutants in the mill effluent

46
Q

What are some ways in which the white water system achieves its purpose

A

By recovering fibers from the stock preparation systems
By providing dilution water from fresh water instead of using recycled water
By providing some shower water from recycled white water instead of fresh water

47
Q

What are 3 types of white water

A

Clear white water
Cloudy white water
Gray water

48
Q

What are some major components of the course screen chest

A

Coarse screen chest
Float purger feed pump
Secondary coarse screen feed pump

49
Q

What are some major components of the gray water chest

A

Stock dilution pump
Tertiary fine screen feed pump
High pressure dilution pump

50
Q

What are some major components of the excess paper machine white water chest

A

Excess paper machine white water transfer pump
Machine pulper dilution pump
High density dilution pump

51
Q

Water in the gray chest overflows to

A

The coarse screen chest

52
Q

Water in the clear white water chest over flows to

A

The gray water chest

53
Q

Excess water in the top ply white water chest is pumped to

A

The excess paper machine white water chest

54
Q

Describe the way the white water inventory is maintained

A

By pumping clear water to the mill effluent system requiring make up to the coarse chest

55
Q

Heat that is transferred to the water by mill processes is dissipated in the _____

A

Surge pond

56
Q

What are some major components of the dewatering system

A

Rotary screen thickener

Screw presses

57
Q

The surge pond is a major component of the effluent system

A

True

58
Q

The primary inputs to the effluent system is _____

A

Effluent from the mill u-drains
Water from the uhle box
Clear white water from the clear white water transfer pump

59
Q

If the level of the effluent sump gets too high wastewater is recirculated to the _____

A

Effluent holding tank

60
Q

Animal waste in the effluent system poses the hazard of carrying disease causing organisms such as hepatitis b

A

True

61
Q

The purpose of the package boiler is to

A

Heat boiler feed water in order to generate steam for use in the mill steam header

62
Q

What are some major components of the package boiler steam side

A

Continuous blowdown system
Feed water pumps
Steam drum

63
Q

What are some major components of the package boiler fire side

A

Wind box
Burner
Forced draft fan

64
Q

Dry steam leaving the steam drum enters the

A

Steam outlet piping

65
Q

Describe the way steam is produced in the package boiler

A

Heat from the furnace boils water in the wall tubes while heat from the exhaust gases boil water in the boiler tube tank

66
Q

Describe the operation of the economizer

A

Feed water supplied to the steam drum is preheated by heat transfer from the exhaust gases leaving the boiler

67
Q

What’s the best way to find a propane or natural gas leak

A

Smelling it

68
Q

What’s the best way to find the source of a steam leak

A

Using a brook held in front of you

Control Room (2 decks)

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