Common trouble of hot blast stove system-Jiangyin Shuangma Heavy Industry Equipment Co.,ltd

Common trouble of hot blast stove system

Operation accident:

1.Misoperation accident: when the manual operation, sometimes for furnace hot blast valve misoperation. That is not to open the wind furnace hot air valve, but first off the original blast furnace hot blast valve, resulting in a sudden burst of blast furnace. Suddenly broken wind if occurred in iron removal before, in a blast furnace hearth large amounts of iron slag is suddenly broken wind blast furnace is equivalent to suddenly sit material will lead to blast furnace tuyere slag irrigation, irrigation slag of blast furnace by Hugh wind processing, also will hold back bad of the blast furnace blower, belonging to the operation of hot blast stove is a major accident. To deal with such accidents, according to the emergency plan for the operation of the hot blast stove, the operation of holding the wind accident.

2.When changing the furnace exhaust gas valve is not closed, open air pressure balance valve, air from the exhaust valve caused by release blast pressure fluctuation, influence of BF, from the air volume, air pressure relationship of quantitative changes between judge and hot air furnace pressure filling up, exhaust valve run sound of the wind, when it is confirmed that belong to the exhaust gas valve is not closed tightly cause, should immediately turn off the air pressure equalizing valve, stop sending wind, node waste valve closed tightly after, reopen the wind are pressure air supply.

3.When changing the furnace combustion valve is not closed tightly, when blowing hot air furnace stamping will result in high temperature air a lot from the burning of the ejection port will burn combustion valve, if Zaiyu gas valve is not closed tightly, gas leakage will cause gas explosion, even the burner, air blower to blow up, if it is found that this kind of accident, immediately stop stamping, and then burn the valve tightly closed, re sent to the wind.

4.Flue gas run accident: the cause of the accident: the flue valve or exhaust valve is not closed. Characteristics of the accident: the air flow increases, the air pressure is significantly reduced, and the sound of the cold air duct is increased. The consequences of the accident: inadequate air flow, the impact of running materials, wind pressure fluctuations, and even lead to collapse. The processing method: stop pressure re shut the chimney valve, exhaust valve, to ensure strict after reperfusion in the wind.

Equipment failure of hot blast stove

1. Hot water shutoff valve, should immediately to take the following measures: if the combustion furnace to stop burning, hot blast valve open, if blast furnace, lower into the furnace volume, changed to a small air supply. Quickly find the maintenance personnel to deal with.

2.Leakage of hot air valve

The harm of hot blast valve leakage: lead to reduce the temperature of the hot air; lead to the lower part of the combustion chamber temperature is too low, often cause point furnace blast; leads to the hot blast furnace refractory lining of ulceration; the furnace to the blast furnace air, moisture large, resulting in blast furnace condition fluctuation.

3.Main causes of hot air valve damage: water valve burn

The inlet and outlet of scaling occurs in the cooling water pressure changes when plugging.

Hot air valve plate, valve ring internal fouling and clogging deposits of local overheating after deformation or crack, will burn hot air valve.

Refractory off, resulting in burned hot blast valve, hot blast valve leakage is found, to immediately cease wind replacement, if unconditional replacement, short time to switch to steam maintain only temporary measures.

Accident treatment in the process of Hugh wind

Backflow pipe fire, water leakage of cooling devices to quickly find out the reasons, timely treatment, if the gas pipe network flow over, immediately check valve leakage treatment in a timely manner, for whatever reason, if it is found that the backflow pipe fire must immediately, as an emergency measure, with hot blast stove backflow or normal break wind.

Off the wind when the wind mixed with large brake off or not locked

Feature: Hugh wind blast furnace is still air. Air inlet gas fire

Consequence: the cold air is not clean, and the air inlet gas fire is greatly influenced the change of the normal operation of the air outlet. Back when the gas fire is large, easy to burn. May enter into the cooling pipes in hearth gas explosion back, gas explosion occurred when the air.

Processing method: immediately close the strict mixed wind gate. If found in the hearth of the residual gas channeling in the cold air pipeline, immediately low exhaust gas temperature of cold air valve of hot blast stove, the flue valve open, the gas exhausted from the chimney.

Back off the wind blowing when the backflow valve is not closed

Features: the back tube has run the wind phenomenon, the night can see the back tube is red.

Results: backflow pipe may burn out serious.

Treatment method: the blast furnace immediately stop sending the wind, turn off the valve after the re send the wind.

The combustion fan start-up accident

Is necessary to conduct a comprehensive inspection of the combustion supporting wind machine to check the project include: combustion air bleeding valve, emission regulation valve is opened, will have to start the combustion air fan air inlet valve is closed, the air valve is open to a, the wind machine oil level is normal, electrical appliances are normal or not, before the start of combustion supporting wind room, control cabinets area to detect the CO content, there had been before the combustion supporting wind room CO content exceeded, causing an explosion accident, two people were seriously injured, so start the combustion air fan must detect the CO content is less than 30mg/m3. in before the start of the combustion air fan

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Add: No.8, Xiaguang Road, Gaoan Village, Xuxiake Town, Jiangyin City
Contacts: Mr.Shen
Tel: 0510-86191088
Fax: 0510-86191800
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