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.