Coupling multistage device with active carbon purifying waste gas

Abstract

The present invention provides coupling multistage apparatus with active carbon to purify waste gas, and the apparatus is used in desulfurizing, denitrating, dedusting, eliminating heavy metal and eliminating organic compound of waste gas. It consists of pre-purifying room, movable adsorption bed, purified gas outlet, material feeding mechanism, and discharging mechanism. Each of the material feeding mechanism and the discharging mechanism consists of material bin, material guide pipe and gas trap valve. The movable adsorption bed consists of one or several adsorption sections superposed sequentially, the material feeding mechanism is set on the top, the discharging mechanism is set in the bottom, and the pre-purifying room and the purified gas outlet are set in the side. The apparatus has compact structure, simple material distribution, complete functions, less resistance, high purifying effect, fully use of active carbon, long service life and low running cost.

Description

technical field [0001] The invention relates to a method for using activated carbon to target the harmful substance SO in exhaust gas 2 , NOx, dust, heavy metals (such as mercury, arsenic, etc.) and organic compounds (such as dioxin, etc.) for multi-directional purification of integrated coupling, multi-stage purification device, which belongs to the technical field of waste gas purification environmental protection equipment and chemical equipment manufacturing. Background technique [0002] There are many harmful substances in industrial waste gas, such as SO 2 , NOx, dust, mercury, arsenic and other heavy metals and organic compounds such as dioxins, which need to be purified and then emptied so as not to pollute the atmospheric environment. Therefore, a variety of single-purpose or multi-purpose purification equipment is required. [0003] The moving bed dry desulfurization and denitrification technology, which uses activated carbon as a desulfurization adsorbent and s...

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Problems solved by technology

[0004] However, the currently used purification equipment has a single bed structure, and the contact method between exhaust gas and activated carbon is either cross-flow or counter-flow

These two flow types have their own advantages and disadvantages. The flow resistance of the cross-flow exhaust gas is small, and the performance of the counter-flow activated carbon is fully utilized, and the purification effect is good; the activated carbon distribution equipment on the top of the purification equipment currently used is complicated and has a high failure rate; the exhaust gas enters the moving bed. Without pretreatment, the SO in the exhaust gas 3 Substances such as HF and HF corrode the purification equipment seriously, and the equipment life is short; the regenerated crushed activated carbon is treated as fuel, and the activated carbon is not fully utilized, and the operating cost is high

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