Safety operation procedures for continuous bright annealing furnace of strip
steel in ammonia decomposition furnace
1、 The operator must go through
three-level safety education and pass the examination before taking the
post.
2、 Safety regulations for blowing in:
1. Routine inspection must be
carried out on the electrical appliances and machinery of ammonia calciner
before blowing in, and the electrical appliances and equipment must be in good
condition and grounded firmly;
2. Turn on the ammonia decomposition furnace
normally. To ensure the normal supply of gas.
3. When the temperature of
annealing furnace reaches 200 ℃, cooling water will be supplied;
4. When the
furnace temperature reaches 600 ℃, apply N2 and clean the furnace with N2.
5.
When the furnace temperature reaches 800 ℃, the oxygen content in the furnace is
less than 0. When it is 5%, the gas is decomposed by ammonia.
6. It is
strictly forbidden to pour the steel belt.
7. The H2 and N2 hoses must be
disassembled after each shutdown.
8. No fireworks are allowed in the
workplace.
3、 Safety regulations for boiler shutdown
1. Cut off the power
supply of each heating zone and cut off the power supply (100 ℃ / time). The
temperature of each area decreased evenly.
2. When the temperature of ammonia
decomposition furnace drops to 800 ℃, the ammonia decomposition gas is replaced
by nitrogen. After the fire of the front emptying pipe is extinguished, continue
to clean the furnace hall with small flow of nitrogen, and stop filling nitrogen
when it reaches 600 ℃.
3. Stop the fan when the temperature of ammonia
decomposition furnace drops to 300 ℃.
4. Stop water when the temperature of
ammonia decomposition furnace drops to 200 ℃.
5. After the annealing furnace
is finished, there should be a guide belt in the furnace for the next time.
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