Working Mechanism And Classification Of Dust
1, mechanical dust collector working mechanism
Mechanical dust settling chamber there, inertial dust collector and Cyclone Three categories. Settlement Office's work is the use of gravity, so gravity is attractive to the Earth on objects. Dust-laden gas in the gravity of the dust in the deposition chamber was separated. Inertial separation of dust using the dust inertia. Inertia force is reflected in the strength of material and its state of motion by external force to change the state of motion when the material. The inertial force in the same small objects than large objects easy to change the inertial state of motion, the acceleration is obtained by relatively large, and this inertia of the dust separation is beneficial. Cyclone Using the centrifugal force. The so-called centrifugal force is doing the circular motion of objects on the facilities in the heart of its separation of power. It is based on the reaction in the rotating body, using centrifugal force to separate non-homogeneous system known as centrifugal separation process. It is based on the mass of the rotating process, the rotation speed of the material obtained by the centrifugal force principle also work great.
2, bag filtration mechanism
Filter bag filter mechanism is a result of the combined effect. Ultrafine particles of dust generally to all coarse particle size distribution according to a certain degree of dispersion curves. While the cloth fibers may ask more than 100mm above the pores, but was able to trap micron particle filter fabrics, filtration mechanism of the various effects that gravity, sifting, inertia collision, hook attached and spread and effects of electrostatic attraction. When the dust when the air flows through the filter cloth, filter cloth gap larger than the particles, due to gravity or inertia effect of the settlement was blocked fibers, particles smaller than the gap filter cloth and filter cloth collision or after the fiber passing hook attached to the bag by fiber surface (ie, hook attached effect) the smaller particles. Brownian motion of molecules due to remain in the cloth surface and the gap in the most minute particles may together with the air passing through the filter cloth and ran away.
3, the working mechanism of ESP
ESP dust separated by the electrostatic or Coulomb force. Removal process is divided into four stages.
(1) gas ionization and dust collection in the Corona between the applied DC high voltage (40 ~ 70kv) to discharge most of corona discharge, gas ionization, generating a large number of free electrons and positive ions.
(2) electrical current through the electric dust charge spatial, the free electrons, ions and dust collision and attachment on it, we realized the charged dust.
(3) charged dust deposition hold dust in the electric field effect of static electricity has been driven to the very dust, to dust after a certain time after the very surface of the release of electric charge and Shen set on it.
(4) very superficial cleaning dust dust Shen set to a certain thickness, the mechanical vibration with the power button and other methods to clear out, so that fall into the hopper in the bottom ash. A very small amount of dust discharge will be attached, also in need of regular cleaning. To ensure high efficiency electrostatic precipitator run, must make these four very effective process.
4, the working principle of wet dust collector Wet Precipitator
principles are short-range mechanism, mainly in the gas and dust filter water contact within the following process: a warm pre-dispersed particles and liquid water film or mist exposure; dusty gas shock layer of water produce small droplets or water film bubble formation; larger particles (such as greater than lmm) were arrested in the collision with the drop set, collection efficiency depends on the level of particle inertia and diffusion. Because the water droplets and the relative motion between air and water droplets around the environment as film role, so close to gas and water droplets, the gas flow around the drop to change. The dust particles spread by the inertia force and effect, maintaining the original trajectory and droplet collision. Thus, in the range of dust particles and water droplets are likely to collide, and then condensed into big as the role of water particles, was brought up water. This shows that small water droplets and the more surface area to increase. More opportunities to contact with dust particles, resulting in collisions, diffusion, condensation efficiency is high. Dust particles in the bulk density, particle size and the greater the relative velocity of water droplets, the collision efficiency, the higher cohesion; and liquid viscosity, surface tension, the larger the droplet diameter. Unevenly distributed, the lower the collision cohesion. Experimental and production experience has shown that hydrophilic particles than the easy capture of hydrophobic particles, it is very easy because the hydrophilic particles through water film's sake. In addition, when the diameter and density of small dust particles, dust removal efficiency decreased. To address the hydrophobic fine particles of dust and the problem of low efficiency, can be added to the water, some about agent to improve collection efficiency.
Working Mechanism And Classification Of Dust
By: polo
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