What is the 1. case that the boiler should stop running immediately?
(1) when the boiler is short of water, the water level is still not seen when the steam door of the water table of the drum is closed.
(2) when the full water of the boiler exceeds the visible water level in the upper part of the drum water table.
(3) the occurrence of cracks of boiler furnace wall and there is danger of collapse or burning red beam grate.
(4) after all the water level meters are damaged.
(5) serious damage to the hydraulic station and the failure to establish oil pressure.
(6) the water wall tube or the economizer tube blasting can not maintain the normal water level in the furnace.
(7) blasting of boiler feed water or steam pipe, when it is dangerous to the person or equipment.
(8) the blower fan is damaged and can not continue to run.
2. what is the phenomenon and reason for the full water of the boiler? How do you deal with it?
Phenomenon:
(1) the water level is not visible or no, the high water level alarm;
(2) the steam temperature is reduced, and the main steam isolation valve and the steam turbine inlet valve can be seen in the white steam.
(3) the water shock of the steam turbine or the steam pipe;
(4) the abnormal flow rate of water supply is greater than that of steam flow.
Reason：
(1) the water supply automatically jumps to manual, which causes the abnormal increase of water supply.
(2) the action of the safety valve on the drum or the header, causing the rise of the water level or the water.
(3) the vaporization of the boiler is overloaded with more steam and water.

Handle：
When the boiler pressure and water pressure to normal, and the water level rise, more than +50mm, should take the following measures:
(1) control and rinse the two water table of the drum to check the correctness of the water table.
(2) the water supply adjustment is changed from automatic to manual, the manual water supply door is closed and the small adjustment door is closed to reduce the water supply.
If the water level in the drum is still rising after it is treated above, the following measures should be carried out when the water level is above +75mm.
(1) the opening of the emergency package for the drum should be shut down immediately when the water level is put to the normal water level.
(2) according to the steam temperature, shut down or closed reduction temperature valve, open the drain valve of main steam piping and Superheater drain valve.
The drum water level continued to rise, and more than the upper drum water level table visible water level, emergency shutdown, as soon as possible and detach the pipe, immediately stop the water, open the door to strengthen the recycling, boiler water, and note the drum level table top water level, the water level to normal level after closing. After the condition of the standby furnace is normal, the value is agreed, and the fire can be operated according to the heat of the furnace.

If the water level is not seen in the water table of the steam drum, it is not found in time, and the following measures should be taken.
(1) control and rinse the two water table of the drum, and check the correctness of the water table. Fully open the drum water level meter, release the water gate, and slowly close the discharge door, such as the water level in the water level meter appears, and continue to rise and fill the water level gauge. It is proved that the boiler full water has not yet exceeded the water level side pipe of the water level meter, then it is treated according to the emergency shutdown.
(2) the water level meter is opened and the water level is not seen in the water table after the water shutting door is slowly closed. In order to prove that it is seriously full of water, turn off the steam water door, open the water door, put the water table in memory water, immediately close the release door. The water table has rapidly ajar valve level, and filled with water, you can determine the water level has exceeded the steam side water level gauge steam pipe, an emergency stop should be conducted as soon as possible, splitting and pipe.
(3) when the boiler water level when the accident occurred, it is difficult to judge if the water level, should immediately stop the furnace. When the furnace is stopped, water is called, and the water level of the drum is checked.
3. how to do &ldquo when the water level of the drum is unknown; called water ”?
(1) slowly open the discharge door, pay attention to the observation of the water level, such as the water level drop in the water level, indicating that the water is slightly full.
(2) if the water level is not seen, the valve is closed, and the discharge door is closed slowly, and the water level is observed, such as the rising of the water level in the water level meter, indicating that it is a slight water shortage.
(3) if the water level is still not seen, close the water gate and slowly open the drain gate. If there is a water level drop in the water level gauge, it indicates that it is full of water. If there is no water level, it indicates severe water shortage.
4. what is the phenomenon and cause of the sudden decrease of boiler load? How do you deal with it? 　
Phenomenon:
(1) steam flow down, pressure rise.
(2) if the discovery and treatment is not timely, it will lead to the operation of the boiler safety door.
(3) the boiler water level drops and then rises, the high water level signal alarm. When the safety door is back to the seat, the water level drops rapidly, which may cause a low water level signal to alarm.
(4) if an electric switch is tripped, the ampere of each auxiliary machine is swinging unnormally and flashing light.
Reason：
(1) off line switch trip.
(2) the turbine emergency shutdown.
(3) the shedding of the valve or the valve of the main valve.

Handle：
(1) according to the water table of the drum and the instructions of the steam and water flow meter, the water supply is automatically changed to manual, and the water level is adjusted in time.
(2) according to the load and decrease pressure rise, turn off the air, kohiki, stop boiler grate, keep off, open steam superheater.
(3) adjust the temperature of the water reducing door in time so that the temperature of steam is normal.
(4) if it is found that the treatment is not timely and the pressure exceeds the safety gate pressure, and the safety door is not moving, the electric door of the steam exhaust steam should be opened until normal pressure.
(5) be ready to take load, and return the monitor and value.
(6) after the accident, check the safety door of the action, whether close is closed or not.
How to deal with the failure of the 5. drum water level meter?
(1) if there is a damage in the water table of the boiler drum, the Watergate and valve of the damaged water table are closed immediately and its hydrophobic door is opened. Monitor the water level in the drum with another normal drum water table. Take emergency measures to repair or replace damaged water table.
(2) if two water level meters in the drum are damaged, the automatic water supply differential pressure gauge of the boiler has been proofread with the drum water level meter in the first hour. When it is confirmed that it is correct and reliable, it will continue to run for 20 minutes according to the instructions of the water supply and steam flow meter. In the above two cases, the monitor should be reported and the value is long, the boiler can maintain the stable load, and the emergency measures should be taken to replace the drum water table.
(3) such asThe water level meter of two steam packages is damaged, and when the differential pressure water level meter is not reliable, it should be treated in an emergency shutdown furnace.
How to deal with the damage of coal pipe in 6. provinces?
Phenomenon:
(1) the water level is reduced, and the flow rate of water supply is not normally greater than that of steam flow.
(2) a sound near the economizer.
(3) the economizer transformation of furnace wall and air leakage at the bottom of the funnel with preheater steaming, wet phenomenon.
(4) the flue gas temperature difference on both sides of the economizer increases and the smoke temperature of the leakage side is low.
(5) the water pressure of the import and export of coal economizer is reduced.

Handle：
If the damage is not serious, should return the value, monitor, reduce boiler load, water will automatically change the manual, and notify the turbine to open water pump to strengthen water supply, stable combustion, strengthen the inspection and monitoring of the fault point, to prevent personal safety measures to maintain a short time operation, report to chief engineer, consult the shutdown.
If there is any risk of endangering the adjacent pipes or affecting the operation of the furnace, or even if the water level is increased rapidly, the water level of the steam drum is still decreasing rapidly. It is urgent to shut down the furnace and prohibit the opening of the recirculating door after the shutdown.
7. the phenomenon and how to deal with the damage of the superheater tube system?
Phenomenon:
(1) there is a noise near the superheater.
(2) the abnormal steam flow rate is less than that of the water supply.
(3) chamber negative pressure abnormal partial or shaking burning, serious by manhole etc. sprayed out from the steam and smoke or flame.
(4) the temperature of the furnace smoke is reduced by the damage of the superheater tube.
(5) the temperature of superheated steam changes.
Treatment: when the superheater tube is inspected to be damaged, it must be immediately returned and repaired. The fan can stop running after the steam is basically disappearing in the furnace to prevent the accident from expanding and prolonging the processing time.
When the superheater tube is not seriously damaged, it will immediately return to the monitor, the value long, the director of the operation, and allow short time to run. If the damaged part is enlarged and deteriorated, the furnace should be stopped and handled in an emergency shutdown furnace.
What is the phenomenon of the 8. fan failure?
(1) the temperature of the blower and motor bearing is suddenly raised or the temperature exceeds the specified value.
(2) the vibration of the fan and motor bearing is suddenly increased or vibration exceeds the specified value.
(3) and a fan motor bearing abnormal noise.
(4) the fan current increases or has abnormal swaying. When the fault is serious, the current exceeds the rated value or the current suddenly arrives at zero, then the red light goes out, the green light flashes, and the tripping alarm alarm.

9. how to rinse the water level meter?
(1) turn off the steam side valve and discharge the discharge valve, open the water side valve and fill the water with the water.
(2) close the water side valve and open the drain valve to release the water.
(3) shut down the drain valve, open the water side valve, and fill the water with the water.
(4) repeat the above (2) (3) steps until the water level is clear.
(5) turn off the blowdown valve, open the steam side and the water side valve, restore the water level meter operation.
(6) close the discharge door and check two water level meters, which should be consistent and slightly sloshing.
10. what are the conditions for the boiler and steam?
(1) the boiler equipment is in normal condition,
(2) the thickness of the material layer is suitable, and the combustion in the furnace is stable.
(3) the superheated steam pressure is slightly lower than the steam tube pressure, which is generally 0.05~0.1MPa.
(4) the temperature of steam is between 370~400OC.
(5) the water level of the drum is about -50mm.
(6) the quality of steam is qualified.
(7) the pipe has been fully heated.
11. what is the task of adjusting the operation of the boiler?
(1) steam turbine steam temperature can meet the needs of normal water level.
(2) the output of the waste material is stable, the material layer is uniform, the combustion condition is good, and the furnace temperature is normal.
(3) hydraulic station oil system is stable, reverse, push grate, push, ash and other systems run normally,
(4) the inlet temperature of the cloth bag is within the specified range and is often made of bag and soot.
(5) the air distribution system of the grate is normal, and its adjustment is flexible.
(6) the combustion chamber has been running in a negative pressure state.
(7) the vaporization of the boiler is within the rated value, and the fluctuation range is small.
(8) to ensure the quality of saturated and superheated steam.
(9) to ensure the safety and continuous operation of the boiler unit.
(10) do not exceed the standard operation, not pressure red line, not low parameter operation.

What is the phenomenon of electricity interruption in the 12. factory? How do you deal with it?
Phenomenon:
(1) 10KV busbar interruption, guide and fan ammeter indicator to zero.
(2) boiler flameout.
(3) flow rate, steam pressure and temperature drop, water level decline.
Handle：
(1) to find out the cause of blackout, when the external failure, immediately notify the dispatch, restore power supply. In the case of an internal fault, it should be immediately reset, the switch of the fan and so on.
(2) the return value is long and the electric power is restored to the plant as soon as possible.
(3) the water supply is closely monitored and the water level is adjusted in time to make it normal.
(4) before the power supply is restored, it is handled according to the normal shutdown.
(5) if the power is restored, it can be reinvested.
13. what are the matters of attention to the discharge of the boiler?
(1) boiler superheated steam, saturated steam, boiler water by chemical personnel sampling analysis, boiler staff should be informed by the staff of chemical sewage.
(2) before regular discharge, the other boilers connected to the same mother tube should be connected by the furnace. As for the maintenance of a boiler connected by a sewage pipe, the isolation measures should be done so as to ensure that the sewage is not poured into the overhaul furnace when the sewage is discharged.
(3) regular sewage, should ensure that the water level is slightly above the normal water level, discharge process must strengthen monitoring and adjustment of boiler water level, prevent accidents caused by sewage water level low.
(4) the general procedure of sewage disposal: first open a door, slowly open two doors. After the sewage is discharged, shut the gates two times, then close the door once, and the sewage should be carried out slowly, so as to prevent the blow up of the parent pipe water.
(5) in the process of sewage discharge, if there is a boiler accident, the discharge should be stopped immediately, but the high water level of the drum and the boiling of the steam and water can be carried out.

14. what should be paid attention to when manual soot blowingMatters?
(1) in order to ensure safety, the acetylene cylinder must be placed in the designated place, lock and prevent the loss of the pressure valve.
(2) the switching operation time of the solenoid valve must be strictly prohibited by the time given by the design.
(3) strictly abide by the operating rules;
(4) when the pressure of acetylene is lower than the allowable value, the gas cylinder should be replaced in time.
(5) according to the situation of ash accumulation, it begins to blow ash once in every class, gradually reducing to one day.
(6) open water drainage regularly and eliminate water accumulation in the tube in time.
What are the conditions for the 15. air compressor to have before it starts?
(1) check whether the main components of the compressor are fastened or not, and no loosening of any connection is allowed.
(2) check the pointer of the oil level meter in the green or orange area.
(3) to use the hand to move the coupling in the prescribed direction, it should be flexible and no block phenomenon.
(4) check whether the electricity meets the requirements of the safety regulations, and the power is connected after confirmation. After installation or rewiring, it should be checked whether the steering of the motor is consistent with the direction shown in the outer surface of the tube.
The source of this article: chemical 707;

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