Dryer exhaust air volume, dust concentration, water, dew point high, easy to condensation, high emission point, a wide range of pollution, dust is difficult. Dryer tail exhaust gas and the plant process conditions, individual enterprises for the drying of multiple materials, production changes, frequent downtime, fluctuation range, and then, with coal for drying heat, sulfur in the exhaust Oxides on the metal structure of the corrosive effect, to the choice of dust to bring some difficulties.
Cyclone dust removal technology
Cyclone technology has the characteristics of low cost of equipment, high temperature gas can be handled, easy to operate, suitable for dust containing high concentration of gas characteristics. Its working principle is in the role of the fan, the dust from the inlet at a higher speed along the tangential direction into the dust collector volute, from top to bottom for the spiral rotation movement, dust particles in the centrifugal force, was thrown To the outer wall, and along the wall under the spin, with the contraction of the cone and turn to the axis, by the lower resistance and return, along the axis from the bottom and spiral rotation through the core tube. Outside the dust particles in the gravity and downward movement of the air driven, along the wall into the hopper, to achieve the purpose of dust. Because the cyclone dust collector is relied on the inertial separation of dust particles, the dust removal efficiency is proportional to the particle size, the particle size is big dust removal effect; the particle size is small, the dust removal effect is poor, the general treatment is more than 20 micron dust, the dust removal efficiency is 70% ~ 90% The
Bag dust removal technology
Bag filter is stable, efficient, easy maintenance, reliable operation is recognized, it is 0.1 micron dust particles, dust removal efficiency can be as high as 99%, dryer dust removal bag filter do not have to consider the concentration of excessive emissions. Dryer anti-condensation glass fiber bag dust collector is the ideal dust purification equipment. The device uses microcomputer control, sub-room backflush, regular cleaning, and equipped with temperature detection display, over-temperature alarm device, the use of CW300-FcA anti-condensation glass fiber filter bag, which can effectively prevent the bag condensation, Bad filter bag. Hebei Taihang Group Company diameter 3 × 24 m slag dryer will be two-stage dust removal process to a LFEF7 × 358-HSY / H anti-condensation bag filter, the environmental protection department, the amount of gas per hour 42621 standard cubic meters , The import dust concentration of 69620 mg per standard cubic meter, the export dust concentration of 147 mg per standard cubic meter, to the national emission standards. Not only to improve the production, but also the recovery of dry material, the annual economic benefits of more than 70 million, while receiving significant social benefits. But the bag filter there is a large area of occupation, high investment shortcomings, with the development of filter bag coating technology, this shortcoming will be overcome, the use will be more extensive.
High voltage electrostatic dust removal technology
High-voltage electrostatic dust removal technology is 50 Hz, 220 volts AC into 100 kilowatts or more DC power added to the corona electrode (cathode) to form a non-uniform high-voltage electric field, the gas ionization produces a large number of negative ions and electrons, so that the gas into the electric field charge , The role of the electric field force, the charge dust tends to the opposite of the electrode, the general anode for the dust pole, relying on the vibration into the ash bucket discharge, complete the process of dust purification. High-voltage electrostatic precipitator can be widely used in building materials, metallurgy, chemical and other industries dust pollution occasions. It treats the dust concentration high, is more obvious to the 0 01 micron fine or the high resistance dust, the dust removal effect is more obvious, the series products meet the different air volume drying equipment, matches the flexible, the exhaust gas exhaust characteristic is the dust control.
Wet dust removal technology
Wet dust removal technology is dust from the fan through the duct into the lower part of the dust tower, due to larger cross-section, the flow rate decreases, and coarse particles of dust in the first settlement in the air, the fine dust increases with the air, spray down the water droplets And dust air flow reverse movement, the dust is wet weight continue to increase, under the action of gravity, to overcome the lift of the air flow into the mud water, through the lower pipeline into the sedimentation tank, to achieve the purpose of dust. Mud water generally through 2 to 3 cycles of precipitation into the water, pump into the dust tower recycling, does not cause secondary pollution. The dust removal technology is generally used for the operation of the drying of clay, a variety of materials (original) material drying, recycling materials are easy to mix and can not be used, and the wind blade wear and tear. Suzhou cement plant in the diameter of 2.2 × 12 meters clay dryer using wet dust removal technology, the emission concentration of 132 mg per standard cubic meter, to meet the national emission standards. The sedimentation tank is cleaned once a year, and the wet soil is stored as a raw material. The dust collection system has high efficiency, low resistance, no secondary pollution, flexible process, reliable operation, low power consumption, investment province, no condensation, strong adaptability, with good economic and social benefits.
Gravity Settlement + High Voltage Electrostatic Precipitation Technology
By the settling chamber and high-voltage electrostatic dust removal process is dust from the fan by the duct into the sedimentation chamber at high speed, collision to the wall, the air flow to change, so that the rapid decline in wind speed, dust particles settling, the discharge equipment, fine dust With the air into the high-voltage electrostatic precipitator electric field, in the continuous bombardment of ions and charge, fly to the dust collector was collected after discharge, the purified gas from the duct into the atmosphere. Two dust removal process, the primary settlement room will be more than 40 microns of large particles of dust collection, reducing the concentration of gas dust, is conducive to improving the efficiency of high voltage electrostatic precipitator dust, wind speed can be larger, the equipment can be smaller, effectively reduce investment. Zhejiang Lanxi Cement Factory diameter 2 2 × 12 m clay dryer dust removal process, dust from the exhaust pipe tail from the fan through the duct into the steel plate produced by the square settlement, after the settlement into the high-pressure electrostatic precipitator Device, after purification into the atmosphere. Induction fan and sedimentation chamber installed in the room, electrostatic precipitator installed in the outdoor, dust removal system normal operation, use for many years, no condensation, the environmental protection department, the emission concentration of 48 mg per standard cubic meter, lower than the national emission standards.
Whirlwind + high voltage electrostatic dust removal technology
The dust removal technology is the dust of the dryer dust from the duct into the pre-efficient cyclone dust collector for dust, dust from the ash bucket by the ash discharge equipment, air dust concentration decreased, and then into the high-voltage electrostatic precipitator secondary dust , After the purification of the gas out of the fan into the atmosphere, so that the efficiency of dust removal, flexible technology, safe and reliable.
The application of exhaust gas dust removal technology not only protects the environment, reduces the labor intensity, but also improves the output of Taiwan and reduces the expenditure of sewage charges. The recovered dust is a good raw material for cement production, with significant economic benefits, Social and environmental benefits.
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