Moving bed treatment device for adsorbing waste gas containing organic volatile matters

Abstract

The invention belongs to the field of adsorption bed treatment devices, and particularly discloses a moving bed treatment device for adsorbing waste gas containing organic volatile matters, which comprises a moving bed adsorber provided with one or more adsorber components connected in series, each adsorber assembly comprises an adsorber shell, a gas inlet pipe, a gas outlet pipe, a gas distribution plate and a discharge cone; the adsorber shell is provided with an adsorption chamber, a gas expansion section, a gas contraction section, an adsorbent feeding section and an adsorbent discharging section, the adsorption chamber is arranged in the middle of the adsorber shell, porous metal nets are welded to the front face and the rear face of the adsorption chamber, and the hole diameter of the porous metal nets is smaller than the diameter of adsorbent particles filled in the adsorption chamber; the gas expansion section is in a quadrangular frustum pyramid shape, the gas expansion section is welded with the front end surface of the adsorption chamber, and a gas distribution plate is arranged in the gas expansion section. The adsorption effect is ensured, the resistance loss in the adsorption process can be reduced, and the economic benefit in the adsorption operation process is improved.

Description

technical field [0001] The invention relates to the field of adsorption bed processors, in particular to a moving bed treatment device for adsorbing waste gas containing organic volatiles. Background technique [0002] Volatile organic compounds (VOCs) generally refer to the general term for organic solutions or solids that have a boiling point below 250°C at normal pressure and can volatilize by themselves. Since VOCs can undergo a series of photochemical reactions in the atmosphere to generate some carcinogenic aerosols, which are also the main cause of haze weather, countries around the world have formulated a series of strict VOCs emission standards. [0003] VOCs treatment methods include adsorption, absorption, combustion and biological treatment, among which adsorption is the most widely used. According to the type of adsorption equipment, the adsorption method is mainly divided into three categories: fixed bed adsorption, moving bed adsorption and fluidized bed adso...

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Problems solved by technology

[0011] Chinese patent application CN108404601A discloses "High Gravity Moving Adsorption Bed Adsorption Gas Equipment". The equipment has fixed bed mode, moving bed mode and rotating bed mode. Exhaust gas, the operation mode of the equipment is changed by changing the flow rate of the adsorbent in the adsorption column, the rotation speed of the adsorption column and the opening and closing of the inlet and outlet of the adsorbent. Efficient and continuous adsorption and desorption process, but the switching of the device mode must be adjusted by continuously controlling the rotation speed of the adsorption column by the motor, and the operation is a bit too complicated

[0012] To sum up, most of the current patent researches on moving beds still have complex structures, which lead to higher equipment costs and more maintenance times, and most of the gas-solid contact is countercurrent, which has relatively large flow resistance. Exhaust gas needs to be pressurized before it can operate, which increases the operating cost, so some small and medium-sized enterprises or factories currently have a low popularity of mobile bed applications.

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