Due to the water circulation of hot hot air stove and heat net in a system, some of the sundries in the hot net are inevitably brought into the hot air stove and precipitated in the lower collection box. In order to prevent the water circulation in the pot from being blocked by the debris and causing the accident, the sediment should be discharged in time.
(1) sewage disposal should be operated by the main stoker and responsible for its professional liaison work.
(2) the hot water hot stove has a regular sewage disposal device. Generally, there are two series of blowdown valves installed.
(3) when the hot blast stove is discharged, its hot water temperature should not exceed 100 degrees.
(4) the hot water and hot blast stove is not less than two times per class, and the sewage discharge should also be strengthened when starting and shutting down.
(5) when the sewage discharge, first open close to the first valve of the hot blast stove, and then slowly open the two valve, after the discharge, first shut the two doors, then shut the door, then the two doors open, closed once. The pollutant discharge sequence is: the lower and lower header, the front and lower header, the two sides lower and middle header, and the boiler drain door.
(6) when the sewage is drained, the opening time of each sewage valve shall not exceed 30 seconds, and no more than one group of sewage discharge doors can be opened at the same time for sewage disposal.
(7) when there is vibration in the process of discharging, the sewage should be stopped in time. After the vibration is disappearing, the valve will be slowly opened and discharged.
(8) after the end of the sewage discharge, after 15 minutes to touch the drain valve after the pipe, if still perm, the two valve should be closed again, continue to perm, indicating that the internal seal of the valve has problems, should be promptly notified to the maintenance personnel for repair or replacement.
(9) when the hot blast stove is discharged, it is forbidden to switch the drain valve with the lengthened handle.
(10) when regular sewage is discharged, the operator should stand on the side of the drain valve and wear the labor protection articles.
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