Instructions for labor protection when servicing hot water boilers KVGM-20 on gaseous fuel

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OCCUPATIONAL SAFETY AND HEALTH
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Instructions for labor protection when servicing hot water boilers KVGM-20 on gaseous fuel

Occupational Safety and Health

Occupational Safety and Health / Standard instructions for labor protection

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Safe Operation

1. General provisions

1.1. This instruction contains requirements for ensuring the safe operation of hot water boilers and is based on the standard instruction of the Gosgortekhnadzor of the Russian Federation.

1.2. Boiler servicing is allowed for persons not younger than 18 years of age who have undergone special training, a medical commission, who have a certificate with a photograph for the right to service liquid fuel boilers.

1.3. Re-inspection of the boiler room personnel is carried out at least once every 12 months.

1.4. When taking on duty, the personnel are obliged to familiarize themselves with the entries in the log, check the serviceability of the equipment and all boilers installed in the boiler room, gas equipment, the serviceability of lighting and telephone.

Acceptance and surrender of duty must be documented by the senior operator with an entry in the shift log indicating the results of checking the boilers and related equipment (pressure gauges, safety valves, nutritional devices, equipment automation equipment).

1.5. It is not allowed to accept and hand over the shift during the liquidation of the accident.

1.6. Unauthorized persons access to the boiler room is allowed by the head of the enterprise.

1.7. The boiler room, boilers and all equipment, passages must be kept in good condition and proper cleanliness.

1.8. Doors for exiting the boiler room should open easily to the outside.

1.9. Boiler elements may only be repaired if there is no pressure at all. Before opening hatches and hatches located within the water space, the water from the boiler elements must be drained.

1.10. It is allowed to carry out work inside the furnaces and flues of the boiler only at a temperature not exceeding 50 ° C with the written permission of the person responsible for the good condition and safe operation of the boilers.

1.11. Before starting repair work, the furnace and gas ducts must be well ventilated, lit and reliably protected from possible penetration of gases and dust from gas ducts of operating boilers.

1.12. Before closing hatches and manholes, it is necessary to check whether there are people or foreign objects inside the boiler.

2. Preparing the boiler for kindling

2.1. Before firing up the boiler, check:

serviceability of the furnace and gas ducts, locking and control devices;
serviceability of instrumentation, fittings, feeding devices, smoke exhausters and fans;
serviceability of equipment for burning gas fuel;
filling the boiler with water by starting the feed and circulation pumps;
lack of plugs on the gas pipeline, nutrient materials, purge lines;
the absence of people and foreign objects in the furnace.

2.2. Check on the pressure gauge that the pressure of the gas and air in front of the burners is consistent with the fan running.

2.3. Make sure that the gas pressure in the GRU corresponds to the operating pressure of 200 mm of water. pillar

2.4. Purge the gas pipeline

2.5. Carry out control pressure testing of the gas pipeline, for which it is necessary to close the valve of the purge plug and make sure that the valve in front of the power supply is closed and the valve to the pressure gauge is open. Open the valve and after the pressure on the pressure gauge increases to a working 200 mm, close the valve. Wash all connections and shut-off valves on the downstream in front of the boiler. Verify that there is no drop in gas pressure within 5 minutes.

2.6. Adjust the draft in the upper part of the furnace by setting the vacuum in the furnace to 2-3 mm of water column.

3. Boiler ignition and switching on

3.1. Boiler kindling should be carried out only if there is a written order in the shift log of the person responsible for the gas economy. The order must indicate the duration of the kindling, the time, who is to carry out the kindling.

3.2. The kindling of the boiler must be carried out within the time set by the head of the boiler room, with low fire, reduced draft.

When kindling the boiler, it is necessary to ensure uniform heating of its parts.

3.3. Gradually opening the valve on the downstream of the boiler, close the bleed candle with a tap and make sure that the gas pressure corresponds to the boiler operating pressure of 200 mm of water column.

3.4. To start the boiler, you must press the "start" button, after which the "start" lamp lights up and the "boiler off" lamp goes out. The boiler ignition program starts automatically. After the stationary igniter has been triggered and the igniter torch appears and the igniter torch appears, open the valve in front of the gas power unit. At the moment the main torch appears, the "small burning" lamp lights up and the "start" lamp goes out.

3.5. Record in the log the ignition time and the main readings from this boiler. Transfer of the boiler to "large combustion", if necessary, is carried out by a toggle switch after the boiler has been warmed up for 45-50 minutes on "small combustion". After switching the toggle switch to the "big burning" position, the "big burning" light comes on.

3.6. The transfer of the boiler from "large combustion" to "small combustion" is also carried out with a toggle switch.

3.7. Monitor the water temperature at the outlet of the boiler, it should not exceed the set temperature.

Keep the outlet water temperature according to the schedule, i.e. depending on the outside air temperature.

4. Boiler operation

4.1. During duty, the personnel of the boiler room must monitor the health of the boiler (boilers) and all equipment of the boiler room, strictly observe the established mode of operation of the boiler. Faults detected during the operation of the equipment should be recorded in a shift log. Personnel must take corrective action. If it is impossible to eliminate the malfunctions on your own, then you must inform the head of the boiler house or the person responsible for the gas management of the boiler house.

4.2. Particular attention must be paid to:

on the water temperature in the heating network;
for the operation of burners, maintaining normal parameters of gas and air according to the regime map.

4.3. Checking the serviceability of the pressure gauge using three-way valves, checking the serviceability of the safety blow-off valve should be carried out by the operator every shift with an entry in the logbook.

4.4. If all or some of the burners go out during boiler operation, the gas supply to the burners should be immediately cut off, the furnace and burners ventilated, and the blow-off candle opened. Find out and eliminate the cause of the violation of the combustion regime and proceed with kindling according to the established scheme.

4.5. During the operation of the boiler, it is forbidden to caulk the seams, weld the elements of the boiler.

4.6. All devices and devices for automatic control and safety of the boiler must be maintained in good condition and regularly checked, within the prescribed time limits, by the administration.

5. Emergency shutdown of the boiler

5.1. If a failure of the safety valve is detected.

5.2. When all circulation pumps stop working.

5.3. With a decrease in vacuum less than 0,5 mm of water column.

5.4. If detected, cracks, bulges, gaps in welds will be found in the main elements of the boiler.

5.5. With decreasing and increasing gas pressure.

5.6. When the fan and smoke exhauster stop.

5.7. When the power supply is interrupted.

5.8. In the event of a fire that threatens the operating personnel and the boiler.

5.9. When the temperature of the water behind the boiler rises above the set value.

The reasons for the emergency shutdown of the boiler must be recorded in the shift log.

In case of emergency shutdown of the boiler, it is necessary:

stop the supply of gas, air, open the valve of the purge plug;
after the fuel supply is cut off and the combustion stops, manholes in the brickwork can be opened;
turn off the water to and from the boiler, switch to work on another boiler.

In the event of a fire in the boiler room, the personnel must call the fire brigade and take all measures to extinguish it without stopping monitoring the boilers.

6. Boiler stop

6.1. It is carried out only on the written order of the person responsible for the good condition and safe operation of the boiler room.

6.2. The stop is made by smoothly closing tap No. 9 in front of the gas power unit until it is completely closed and the torch in the furnace is extinguished.

6.3. After that, the alarm is turned off, the valve No. 8 on the lowering of the boiler is closed and valve No. 10 on the purge candle is opened.

6.4. Turn off the machine on the KSU block.

6.5. In order to reduce the corrosion of the boiler, after it is put into standby, it is necessary to keep it filled with pressurized water.

6.6. If there is no other boiler in operation, stop the circulation pump.

6.7. Make an entry in the shift log when the boiler stops.

7. Final provisions

7.1. The administration of the enterprise should not give instructions to the personnel that are contrary to the instructions and may lead to an accident or an accident.

7.2. Workers are liable for violation of the instructions relating to the work they perform in the manner prescribed by the internal labor regulations and the criminal code of the Russian Federation.

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