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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
There are _____ stages of forward cleaners
4
26
Accepts from the _____ are discharged to the disc thickner
Primary reverse cleaners
27
The acceptable fibers from the primary for cleaners are sent to the _____
Primary reverse cleaners
28
There are ___ standpipes in the reverse cleaning system
2
29
There are ____ stages of the reverse cleaners
3
30
The standpipes provide the necessary surge volume for the system
True
31
3 purposes of the pulper and dispersion system are
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
What are 3 major components of the thickener
Disc thickener Disperser #1 bypass screw conveyor Disperser #2 bypass screw conveyor
33
What are 3 major components of the dispersion system
Plug screw Screw presses Preheater
34
What are some outputs of the thickener and dispersion system
Medium consistency pulp to the high density chest Cloudy filtrate to the gray water chest Clear filtrate to the clear white water chest
35
What the best way to describe how the thickener works?
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
What best describes the operation of the dispersion system
Thickened pulp is heated to soften impurities which are then distributed uniformly through out the pulp
37
What’s the best way to describe the medium consistency system
Dispersed pulp is mixed with water to achieve the desired consistency and then pumped to the high density chest for storage
38
What is the best way to describe the operation of the disperser bypass system
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
What equipment is used to remove the plastics, wires, cords, etc. from the pulper
Ragger
40
What major piece of equipment is the scavenger attached to
Hydrapulper
41
The coarse and fine cyclones feed their rejects to the sand separator
True
42
The reject sorters output rejected materials and fiber/water. Where is the fiber/water sent?
Screw presses
43
What is a large holding tank that separates suspended solids in the water by sedimentation and floatation
DAF process clarifier
44
The float purger is used to separate lighter and heavier components from the screen rejects
True
45
The purpose of the white water system is to
Maximize the amount of fresh water brought into the mill, and maximize the discharge of pollutants in the mill effluent
46
What are some ways in which the white water system achieves its purpose
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
What are 3 types of white water
Clear white water Cloudy white water Gray water
48
What are some major components of the course screen chest
Coarse screen chest Float purger feed pump Secondary coarse screen feed pump
49
What are some major components of the gray water chest
Stock dilution pump Tertiary fine screen feed pump High pressure dilution pump
50
What are some major components of the excess paper machine white water chest
Excess paper machine white water transfer pump Machine pulper dilution pump High density dilution pump
51
Water in the gray chest overflows to
The coarse screen chest
52
Water in the clear white water chest over flows to
The gray water chest
53
Excess water in the top ply white water chest is pumped to
The excess paper machine white water chest
54
Describe the way the white water inventory is maintained
By pumping clear water to the mill effluent system requiring make up to the coarse chest
55
Heat that is transferred to the water by mill processes is dissipated in the _____
Surge pond
56
What are some major components of the dewatering system
Rotary screen thickener | Screw presses
57
The surge pond is a major component of the effluent system
True
58
The primary inputs to the effluent system is _____
Effluent from the mill u-drains Water from the uhle box Clear white water from the clear white water transfer pump
59
If the level of the effluent sump gets too high wastewater is recirculated to the _____
Effluent holding tank
60
Animal waste in the effluent system poses the hazard of carrying disease causing organisms such as hepatitis b
True
61
The purpose of the package boiler is to
Heat boiler feed water in order to generate steam for use in the mill steam header
62
What are some major components of the package boiler steam side
Continuous blowdown system Feed water pumps Steam drum
63
What are some major components of the package boiler fire side
Wind box Burner Forced draft fan
64
Dry steam leaving the steam drum enters the
Steam outlet piping
65
Describe the way steam is produced in the package boiler
Heat from the furnace boils water in the wall tubes while heat from the exhaust gases boil water in the boiler tube tank
66
Describe the operation of the economizer
Feed water supplied to the steam drum is preheated by heat transfer from the exhaust gases leaving the boiler
67
What’s the best way to find a propane or natural gas leak
Smelling it
68
What’s the best way to find the source of a steam leak
Using a brook held in front of you

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