1. Cast oil for combustion, maintain stable combustion.
2. Adjust the combustion to reduce the flame center.
3. The amount of air output may be properly reduced to maintain stable negative pressure. In case the negative pressure of the combustion chamber can not be maintained, the automatic control device of the induced draft fan shall be disconnected, and the induced draft fan shall be manually adjusted to prevent the flame kemel be raised excessively.
4. When the automatic control device for the attemperation water system is not reliable, it is required to manually open the valve of the attemperation water system wider. It shall be noticed that a certain degree of superheat is required.
5. The steam admission control valve may be opened properly in order to increase the flow.
6.  Check the damage reasons of water seal and take relative measures to establish water seal.
7. In case the water seal can not recover to normal and can not maintain the stabilization of hearth combustion and normal parameters, it is required to shutdown the boiler.