171、background of research on demist device of air temperature gasifier
classification：industry publishtime：2021-02-22 16:35:23
research background of air heated vaporizer demister
research background of demister
air heated gasifier is a new type of high efficiency environmental protection and energy saving device using air for heat exchange. it is mainly used for gasification of low-temperature (- 104 ℃ ~ - 196 ℃) fluids, such as lo2, ln2, lar, lng, lc2h4 and other low-temperature media, that is, converting low-temperature liquid into normal temperature gas to meet the application in steel, solar energy, electronics, shipbuilding, natural gas industry, chemical industry and other fields.
generally, the large-scale (≥ 2000nm3 / h) air temperature gasifier has fog phenomenon in the process of practical application. although the white fog has no chemical pollution to the environment, a large number of white fog will spread to the production area, which will affect the operator's line of sight. generally, the white fog of large-scale gasification station will diffuse throughout the whole area, bringing safety hazards to the normal operation of the factory and road traffic, therefore, it is necessary to study a reasonable mist eliminator.
the generation of white fog
the large-scale air temperature gasifier is to heat and gasify the low-temperature medium through natural convection and heat exchange tube. after heat exchange, the air temperature decreases, and the water vapor in the air condenses to form a white fog, which gathers at the bottom of the gasifier and diffuses to the surrounding. the results show that the area with ⊿ t ≤ 0 is the area of white fog.
description of demister
the demisting device of the gasifier invented by the company includes a fence on the ground around the gasifier, the outer side of the fence is provided with an exhaust device connected with the inner side of the fence, the exhaust device includes a static pressure box, an air collector, an air duct and an air outlet elbow connected from bottom to top, and the side wall of the static pressure box is provided with a regulating damper, a motor and an impeller connected with the motor are installed in the air duct.
principle of demister
the fog is concentrated in the fence through the fence to prevent the fog from spreading to the surrounding area; the outer side of the fence is provided with an exhaust device connected with the inner side of the fence. the exhaust device adjusts the appropriate air volume according to the amount of fog, mixes the fog and discharges it upward (or heats it), and fully mixes with the surrounding air when discharging, so as to effectively eliminate the fog and achieve the purpose of not affecting the traffic and personal safety of the surrounding environment, moreover, by increasing the air velocity around the gasifier, the heat exchange efficiency can be greatly improved, and the equipment switching time can be effectively prolonged.
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