The introduction of metal tube heat exchangers in the dust removal system has two main purposes: 1 to greatly reduce the temperature of the flue gas, to protect the high-efficiency ceramic multi-tube dust collector and the boiler induced draft fan; to recover the heat of the high-temperature flue gas and improve the combustion in the kiln. The air temperature and gas temperature enhance the flame strength of the lime kiln calcination zone, accelerate the decomposition of limestone, and greatly increase the output of the lime kiln. In order to better recover thermal energy, all equipment (including heat exchangers) and piping before the heat exchanger are insulated. Due to the high temperature of the lime kiln flue gas (up to 600e), in order to prevent the corrosion of the pipeline by the high-temperature flue gas, the flue gas pipeline at the outlet of the kiln top to the cyclone dust collector is internally insulated, and the lining of the flue gas duct is floated. Beads PG1.0. Other equipment is made of external insulation, and the insulation material is aluminum silicate fiber felt. The dust removal efficiency of the cyclone is increased with the decrease of the diameter of the cylinder. In order to improve the dust removal efficiency, many cyclones made of small-diameter ceramics are used in parallel, which constitutes a ceramic multi-tube dust collector. The dust removal system adopts the patented KL10t/h high-efficiency ceramic multi-tube dust collector, and the air volume is about 30,000m3/h, and the working temperature is <250e. When the dust collector is working, the dust-containing gas passes through the air distribution chamber and the guide in the cyclone. The inside of the sub-rotation rotates downward, the dust is separated from the gas by the centrifugal force, and under the action of gravity, it is swirled into the ash bucket with the airflow, and is discharged by the star-loading ash discharge valve; the purified gas forms the upward swirling airflow by the exhaust pipe. Enter the exhaust chamber and discharge through the induced draft fan. KL high-efficiency ceramic multi-tube dust collector is a new generation of ceramic multi-tube dust collector. Its movement is streamlined, the guide is low-resistance type, and the cyclone is anti-blocking type, which reduces impact, resistance and wear, and further improves The performance and service life of the dust collector. The purpose of the KL-type high-efficiency ceramic multi-tube dust collector in the lime kiln flue gas dedusting system is to collect the fine lime particle dust (particle size 205Lm) which is difficult to collect by the cyclone dust collector, and further reduce the dust content of the boiler induced draft fan flue gas. Therefore, the purpose of protecting the boiler induced draft fan impeller and environmental protection compliance is achieved. As the last stage of the lime kiln flue gas dedusting system, the use of KL high-efficiency ceramic multi-tube dust collector has the following advantages over the use of traditional bag filter: First, the cost is low, the price is only 65,000 yuan, less than the same treatment The price of the bag dust collector is half; secondly, there is no running parts, the reliability is higher, and the maintenance management is simpler. Third, there is no replacement problem of wearing parts such as bag filter material, and the running cost is lower.
The boiler induced draft fan adopts Y4-68l.10D and the supporting motor Y225M-4. Due to the high viscosity of the lime dust, the boiler induced draft fan will still produce ash on the surface of the fan impeller during long-term operation, thus affecting the dynamic balance of the fan impeller, resulting in the fan generation. vibration. In order to eliminate this undesirable phenomenon, the boiler draft fan impeller needs to clean the accumulated dust. In the case that production is not affected, the impeller is generally cleaned during shutdown maintenance.
Fiber Laser Cutting Machine,Metal Fiber Laser Cutting Machine,Fiber Laser Cutter,Brass Fiber Laser Cutting Machine
Jinan Bodor CNC Machine Co., Ltd. , https://www.lasercuttings.nl