Production Flashcards
Who should operate a high pressure, steam boiler?
Qualified technician. (per the MSC)
At how many pounds of steam pressure does a Cintas laundry generally operate a high pressure, steam boiler?
100PSI
What pieces of equipment in a typical Cintas laundry require steam?
Presses, Steam Tunnel, Washers, Dryers, Ironers
How often is a high pressure steam boiler inspected and why?
Tunings every 6 months Insurance every 6 months. State Inspection Annually.
At what frequency should the controls and safety devices be inspected and tested?
Tunings every 6 months. Daily inspections for low water, chemical is daily. High pressure switch is daily.
Why is chemical treatment important for a boiler?
Keeps corrosion out of the boiler, prevents scaling from the water
What purpose does a water softener provide for a boiler system?
Removes hardness out of the water
What purpose does a boiler feedwater system provide?
Chemical injected and heated to reduce gas burn while filling a boiler
If your boiler is scaling, what does this mean?
Chemical reactivity is poor
Why should boilers be blown down, and at what areas should blowdown occur?
Top and bottom rail to help reduce scaling and impurities
What does night firing a boiler mean, and why would you do it?
Keeps the water hot while all other boiler system is shutdown. Keeps boiler water at temp.
You walk into your boiler room and it is operating at only 50 psi. What pieces of equipment, if any, would not function at this pressure?
Washers will error out.
If the situation in the previous question, (boiler at 50PSI), were to occur, then how would you try to continue to operate, or would you shut down?
Minimize the usage by shutting down a couple fo washers and uni presses so we can maintain use of the steam tunnel.
What pressure devices are present on a high pressure, steam boiler?
Pop off valves, High and low limit safety devices,
What water level safety devices are present on a high pressure, steam boiler?
High and low
What type of information should be kept within a boiler log?
Chemical , high and low steam. High low water, then the blow down, hardness.
What is tempered water and why do we use it?
Lower degree water used for rinse.
At what temperature should your hot water tank be set?
140 Degree
Why do we have holding tanks for hot and tempered water?
For when washers are not operating under normal conditions and these tanls would act in keeping a constant pressure.
What is a boiler stack economizer? What water temperature increase should you typically see when using this piece of equipment?
Uses exhaust gas to heat our water. 20 degrees
What is a wastewater heat reclaimer and how does it function?
uses heat from the waste water water and heats our tempered watrer.
With respect to the flow of city water, what direction does the wastewater flow and why? Is there any reason this direction would ever change?
the heat reclaimer has a 4 way valve on the end of it. Its sole purpose is to change the direction of the water inside of the system. Its main purpose is to back flush the system to help Prevent clogs. The valve typically runs in forward for 27 minutes and then changes direction for 3 minutes. Therefore, this happens twice an hour. Note: The waste water flows on the inside
What does the word “approach” mean, and what should it be on a wastewater heat reclaimer?
approach=is calculation of water in and out of the heat reclaimer.
If your wastewater heat reclaimer goes down, what impact would this have on your operation?
Costs wouold increase, might not be within City Limits of hot waste water. 100 degree discharge per the permit. Potentially could shut production down.
How else do we heat hot water? Is this an open or closed system?
Steam Closed system
If a hot water pump goes down, what would you do?
Switch it to the other pump. Then rebuild the pump that failed.
At what pressure should the air compressor operate?
100PSI
What is the purpose of an “air dryer” and why is it important?
Takes the moisture out of the air to prevent clinoid malfunctions. Helps prevents rust also.
Why do we pump our pits? How often should this be done?
Keeps sludge out of our pumps. Helps with out permit levels. Between 5 an d 6 months depending on soil level.
What is the purpose of the equalization tank?
blend together different different wash alley dischsarges with wide variations of pollutants and contaminatnets. Is critical in the effective operation of the DAF.
What is the optimum pH for wastewater treatment to remove metals and proper DAF operation?
9-9.5ph
How often should pH probes be cleaned and calibrated?
Weekly
What are the staffing requirements for a location who has pretreatment (DAF)?
Waste water tech per shift being run.
What are the requirements of a pretreatment operator?
testing of waste water for chemical dosage, pump screens, trench screens, DAF cake removal, cleaning of the J Press
What is the minimum clarity required to operate the treatment system in order to obtain compliance?
10
What do we test our sludge for and how often should this be done?
Contaminates, metals, toxins Annually usinga T clip
How do we know what the legal discharge limits are for non-hazardous sludge disposal?
Through our city limit permit
What categories are on a sludge manifest?
Generator, Transporter, what and how much is being transported.
What is the importance of knowing the quantity and location of sludge disposal?
As a part of EPA compliance we own the entire process until it is disposed of. We keep copies of the for auditing purposes.
What is necessary in order to comply with wastewater discharge?
To prevent plant shutdown due to poor sludge program. Can cost you fines with the City and the EPA.
What steps should you take to ensure your waste hauler is obeying all pertinent dumping laws?
Debrief with the vendor during pick ups. Follow the driver to ensure proper routing is being followed.
Does Cintas process any hazardous materials within the wash alley? If yes, what customers?
Not at this location.
What are the different soil classifications you will use in the soil room?
Micro fiber, Terry, Shop, Mats, poly, cotton, FR, heavy metal, heavy soil
How do we determine the correct poundage for sling weights?
Determined by the chemistry and washing machine type. Corporate and WSI sets the standards.
What is soil separation and how do you feel it should be handled in a plant?
The separation of product by type. i.e. MF towel vs mops.
In what sequence will you process your garments?
This will be done by batch day and location. Also keeping a good wash alley mix using the wash eye legend.
There are five components of successful washing. What are they?
Time, Temperature, Chemical, mechanical action, water.
Who will determine whether garments will be special washed or not?
Plant and Service leadership.