In view of the current environmental protection requirements, the collection of pollutant discharge costs, and the differences in the performance of electrostatic precipitators and bag filters, and the actual situation in various industries, the basic performance of the two types of precipitator accessories in practical applications Simple and objective comparison.
First, for the traditional dry process system, the valve and the compensator have different degrees of wear, the seal of the valve melts, and so on. The selected valve and compensator are sprayed with a wear-resistant coating. The seal ring is selected for high temperature resistance. With high-strength materials, the operating cycle is greatly extended.
Second, when the blast furnace encounters high temperature or low temperature of the coal gas and the furnace conditions are not stable, the conventional technology adopts a cold heat exchanger to solve this problem, and the cold heat exchanger has a small amount of processing and cannot meet the production needs of the large blast furnace. The new system adopts the process of top-dumping and adding waste gas relief valves to effectively control the pressure at the top of the blast furnace and ensure the normal operation of the blast furnace. It provides a new way to solve the problem of high temperature or low temperature of gas in the dry bag-type dust removal system.
Third, the new system adds a cyclone dust collector after the gravity dust collector, which greatly reduces the filter load of the box and prolongs the service life of the bag.
Fourth, on the basis of testing various kinds of filter bags, choose the composite filter material that is really suitable for large blast furnace dust removal, and the instant temperature resistance can reach 390°C, which greatly improves the reliability of system operation.
5. A large box body bag dust collector with a diameter of φ5232 mm was established, greatly reducing the floor area, simplifying the process flow, and satisfying the requirements of the filter area. It was the first in China.
6. Established the possibility of pulse backflushing and pneumatic ash transport in the large-scale blast furnace dry dedusting system, reducing the number of process steps, and simplifying operation and maintenance.
7. The system adopts DCS control and the process control is more reliable.
First, for the traditional dry process system, the valve and the compensator have different degrees of wear, the seal of the valve melts, and so on. The selected valve and compensator are sprayed with a wear-resistant coating. The seal ring is selected for high temperature resistance. With high-strength materials, the operating cycle is greatly extended.
Second, when the blast furnace encounters high temperature or low temperature of the coal gas and the furnace conditions are not stable, the conventional technology adopts a cold heat exchanger to solve this problem, and the cold heat exchanger has a small amount of processing and cannot meet the production needs of the large blast furnace. The new system adopts the process of top-dumping and adding waste gas relief valves to effectively control the pressure at the top of the blast furnace and ensure the normal operation of the blast furnace. It provides a new way to solve the problem of high temperature or low temperature of gas in the dry bag-type dust removal system.
Third, the new system adds a cyclone dust collector after the gravity dust collector, which greatly reduces the filter load of the box and prolongs the service life of the bag.
Fourth, on the basis of testing various kinds of filter bags, choose the composite filter material that is really suitable for large blast furnace dust removal, and the instant temperature resistance can reach 390°C, which greatly improves the reliability of system operation.
5. A large box body bag dust collector with a diameter of φ5232 mm was established, greatly reducing the floor area, simplifying the process flow, and satisfying the requirements of the filter area. It was the first in China.
6. Established the possibility of pulse backflushing and pneumatic ash transport in the large-scale blast furnace dry dedusting system, reducing the number of process steps, and simplifying operation and maintenance.
7. The system adopts DCS control and the process control is more reliable.
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