Standard Operating Procedure for Engineering Boiler Operation

SOP Number: Hotel Engineering SOP  – 03

Department: Engineering and Maintenance

Date Issued: 10–Feb-2018

Time to Train: 30 Minutes

Engineering Boiler Operation Standard Procedure:

The main purpose of the Boiler operation SOP is to ensure that the hotel boiler is maintained in excellent conditions and hot water supply is available to all guestrooms and public areas.

1) Fill the feed water in the coil with the help of feed water pump till the time water comes out of the by-pass line.

2) The boiler can be fired by putting the rotary switch in the fire position. (or as per the operation manual supplied by the manufacturer.)

3) Below sequence will take place for the firing to start in boiler:

* A signal is given to sequence controller from ON/OFF pressure switch.

* After that blower and fuel pump are started.

* Then after the pre-purging time is over, ignition and burner are energised to produce a spark and spray fuel in the combustion chamber.

4) Once the boiler is started the steam pressure will start rising and when it crosses 3-4 Kg/cm close the by-pass valve and let the boiler develop pressure to the maximum set pressure i.e. 10 Kg/cm

5) The boiler will automatically stop at the set pressure by the high steam pressure switch.

6) Min valve should be opened slowly so that pressure does not drop below 5 Kg/cm because it is low-pressure safety.

7) Then as per the demand of steam boiler will work ON-OFF.

8) If the boiler is running continuously for 8 hrs. It is necessary that boiler is given a blow-down so that if any scale has settled at bottom of coil they will come out so that the possibilities of sudden coil chocking will be eliminated and monitoring over the quantum of scale formation can be done.

In order to perform blowdown the following points to be noted:

a) Let boiler go at a high (set temperature) preferably to be noted.

b) Close main steam stop valve and open blow down valve.

c) Let pressure drop to 6 Kg/cm pressure drop count time, that will be a blowdown time.

9) Again blow down valve shall be closed and by-pass valve should be open and coil should be filled up with water.

10) For cooling let the temperature be brought down to 100 deg. C.

Training Summary questions:

Q1. What is the purpose of the boiler SOP?

Q2. What is the sequence for starting a fire in boiler?

Q3. What stops the boiler from high pressure?

Q4. Explain the blowdown process?

Q5. Who is responsible for inspecting the boiler plant?

Side 2 av 2

SOP Number: Hotel Engineering SOP  – 04

Department: Engineering and Maintenance

Date Issued: 13–Feb-2018

Time to Train: 30 Minutes

Water Treatment Plant Operation Standard Procedure:

The Water Treatment Plant consists of the following:

1) Raw water filters.

  • It is used to remove the particular impurities or the suspended impurities from the untreated (hard water) i.e. raw water.
  • The raw water filter requires backwash process to maintain efficient flow of water. With required quantity and pressure.

2) Water Softener Plant.

  • Water softner plant is used to reduce the temporary hardness in the water.
  • The soft water is being used at many places as it helps to avoid any damages to equipment used in the hotel like boilers and also other equipment where hot/cold water is regularly used.
  • The softener used in the Hotels is a cation base.
  • A chemical change takes place and softens the water by removing calcium and magnesium salts, which creates the temporary hardness of the water.
  • It is a cold process basically known as Ion Exchange.
  • The softener requires regeneration time to time to have a good quality of soft water throughout the system.
  • Before doing regeneration, ensure that the raw water and domestic water tanks are also full.
  • When the water hardness exceeds 80 ppm. Engineering team should perform the regeneration of softener.

3) Activated Carbon Filter.

  • Activated carbon filters are generally employed in the process of removing organic compounds and/or extracting free chlorine from water, thereby making the water suitable for discharge.
  • Eliminating organics in potable water, such as humic and fulvic acid.
  • Prevents chlorine in the water from chemically reacting with the acids and forming trihalomethanes, a class of known carcinogens.

4) Hydropneumatic System.

  • The Hydropneumatic System is a modernization of the older gravity tank method of water supply, Its main purpose is to control or boost a limited supply pressure to a higher or to a more uniform value.
  • A hydropneumatic tank contains pressurized air and water.
  • It does not have a bladder and air is in direct contact with the water.
  • The compressed air acts as a cushion exerting or absorbing pressure.
  • As the flow begins, one of the pumps starts at low speed and as the demand increases the pump speeds up until it reaches the full RPM level
  • At this point, the second pump becomes operational (start).
  • The speed of the two pumps varies till they reach the full RPM.At this stage, the next pump starts.
  • The same sequence is repeated for the additional pumps and each pump, in turn, changes over automatically and maintains the system pressure according to the demand, time and fault.
  • When the water demand is zero the system shuts-off automatically and when the system is running continuously, the lead pump alternates based on the time set.

Back Wash Procedure:

  • It is the reverse process of normal supply through the filter.
  • Backwashing of the filter required when the filter bed gets chock by determining the water pressure falling across the filter inlet and outlet.
  • It should not exceed 5 psi in the bed by installed pressure gauges.
  • In the normal course, the water enters the top of the filter bed and comes out from the bottom of the filter bed.

Training Summary questions:

Q1. What all consists of a water treatment plant?

Q2. Explain the sequence of backwash procedure?

Q3. What is a Hydropneumatic System?

Q4. Explain the functionality of activated carbon filter?

Q5. When to do a regeneration of the filters?