Flue gas purifying device for fixed-bed

Abstract

The invention discloses a flue gas purifying device for a fixed-bed, which is filled with activated carbon fiber. The top part of a shell of the device is provided with an exhaust inlet and the bottompart is provided with an air outlet; the inner cavity of the shell is divided into a diversion section, a purification section and an air collection section from top to bottom; the diversion sectionis provided with a plate rectifier with holes and a diversion plate is arranged on the plate rectifier; and the purification section is provided with an activated carbon fiber filling cell. The upperend and the lower end of a fixed frame of the activated carbon fiber filling cell are provided with two parallel comb plates respectively; upper clamping plates and lower clamping plates are respectively inserted in various comb openings of the upper comb plate and the lower comb plate; sheet-shaped activated carbon fibers are fixed between the upper clamping plates and between the lower clampingplates; and the width of the spacing between the adjacent two activated carbon fibers is between 0.5 mm and 10 mm. In the invention, the activated carbon fiber can be tightly, reliably and fixedly installed in the purifying device for a long time. The device has the advantages of compact structure, high filling efficient of activated carbon fiber, low consumption of a reactor, convenient repair, installation, replacement and reproduction and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a fixed-bed flue gas that uses activated carbon fiber as an adsorption material for removing sulfur oxides, nitrogen oxides, and highly toxic substances such as mercury in coal-fired flue gas or other harmful waste gases. Purification device. Background technique [0002] As a kind of activated carbon, activated carbon fiber is the third-generation product in the activated carbon family. Compared with powdered activated carbon (PAC) and granular activated carbon (GAC), it has better adsorption capacity, micropores and It has more advantages in active sites, adsorption catalytic capacity, gas-solid contact efficiency, etc., and has shown broad application prospects in flue gas desulfurization, denitrification, and even the removal of heavy metals and volatile organic pollutants. [0003] The activated carbon fiber adsorption method is to use the high adsorption cap...

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Problems solved by technology

[0009] Chinese patent document CN2429246Y (authorized announcement date is on May 09, 2001) discloses a kind of activated carbon fiber desulfurization device, and the filling and fixing of its activated carbon fiber is to realize with the form of making some filter tubes with activated carbon fiber, although this kind of mode can Fixing the activated carbon fibers firmly and evenly, and fully contacting the flue gas, can effectively improve the utilization rate of the activated carbon fibers and the adsorption and desorption rate, but the production is more troublesome, especially in the case of a large flue gas flow rate. Each filter tube needs a separate flue gas channel, and the characteristics of activated carbon fiber make the diameter of the filter tube limited, so the number of filter tubes will increase linearly with the increase of the flue gas flow rate, which will not only make the equipment more bulky And increase the manufacturing cost, and the pressure loss will increase linearly with the increase of the number of filter tubes, thus increasing the operating cost

The pressure loss of the adsorption device is very small, and it is more effective in the occasions where the treatment flow rate is small and the flow rate is low; for large-scale boiler exhaust gas, its filling efficiency is too low, and it is obviously difficult to achieve gas purification by only two concentric circular filter elements. Requirements

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