Daily Question (April 3)

Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal feed rate should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. (2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Restarting is only allowed after confirming that the fire is out and the interior has been cleaned

Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

　Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

(1) The outlet temperature of the coal grinder rises abnormally suddenly； (2) There is a noticeable sense of thermal radiation around the coal grinder casing ； (3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

Answer: The typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

　　Typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； 　　(2) There is a noticeable sense of thermal radiation around the coal grinder casing ； 　　(3) The discharged stone coal is burning or glowing hot coke is visible. 　　The basic cause of an internal fire is: (1) The temperature at the outlet of the grinding widthener remains too high. 　　(2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. 　　(3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. 　　(4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. 　　The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal supply should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. 　　(2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.

The typical signs of an internal fire in a medium-speed coal grinder are: (1) a sudden and abnormal increase in the temperature at the grinder’s outlet； (2) There is a noticeable sense of thermal radiation around the coal grinder casing ； (3) The discharged stone coal is burning or glowing hot coke is visible. The main cause of an internal fire is: (1) the temperature at the outlet of the width grinding machine remains too high. (2) The coal that has self-ignited or begun to volatilize in the raw coal bin has entered the coal mill. (3) In coal mills operating under positive pressure, combustible materials such as pyrite and fibers that may smolder are present in the coal bunker and have not been removed in a timely manner. (4) The coal powder remaining from the last shutdown was not completely removed, and upon restart after a long interval, the residual coal powder had begun to self-ignite. The general measures for dealing with a fire inside a coal grinder are: (1) Upon detecting signs of a fire, the ventilation volume should be reduced immediately, while the coal feed rate should be increased appropriately. If the temperature drops significantly after such treatment, the coal grinding output can be appropriately reduced and a lower air flow rate maintained. Once it is confirmed that the fire has been extinguished, normal operating conditions can be resumed. (2) If the above measures are ineffective, the grinding system should be shut down; the primary air inlet damper and the outlet isolation damper should be closed to cut off the air supply and extinguish the fire. Then carefully open the coal grinder inspection door and the stone coal door, and spray the fire extinguishing agent. Only after confirming that the fire is extinguished and the interior has been cleaned can it be restarted.