Gas purifying device

Abstract

The invention relates to a device for purifying gas by using a solid granular cleaning agent such as active coke. The device for purifying gas provided by the invention comprises a bed body, a feed chamber and a discharge chamber, wherein the feed chamber is mounted at the right end of the bed body, while the discharge chamber is mounted at the left end of the bed body; the left side of the feed chamber is communicated with the right end of the bed body; the right side of the discharge chamber is communicated with the left end of the bed body; a first feed pipe is mounted at the top end of the feed chamber; a first discharge pipe is mounted at the bottom end of the discharge chamber; a gas inlet pipe is mounted on the left sidewall of the discharge chamber, while a gas outlet pipe is mounted on the right side wall of the feed chamber; the bed body comprises a plurality of adsorbent channels arranged on the left and the right sides; and each adsorbent channel is inclined upwards from left to right. The device is simple in structure, easy to detach and repair and low in cost; and the device is not only high in desulfuration, denitration and dust removal efficiency, but also low in active coke layer resistance, and thereby is capable of ensuring normal flowing of the active coke and the flue gas.

Description

technical field [0001] The invention relates to a gas purification device, in particular to a device for purifying gas by using solid granular purifiers, such as activated coke and activated carbon. Background technique [0002] Following the establishment of my country's sustainable development strategy goals, the country's environmental protection policies have become increasingly stringent, and flue gas desulfurization and denitrification have become one of the key issues in our country. Activated coke dry desulfurization and denitrification technology is often used in the purification of flue gas from industrial coal-fired boilers, and also in the purification of gas in absorption towers in the fields of chemical industry, metallurgy, glass, and pharmaceuticals. Activated coke has the characteristics of activated carbon, that is, activated coke itself is not only an adsorbent, but also a catalyst, and can also be used as a catalyst carrier. When the flue gas passes thro...

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Problems solved by technology

Disadvantages: The flue gas enters the activated coke bed from the side, the activated coke near the flue gas inlet first undergoes adsorption reaction and reaches saturation first, the flue gas moves from left to right, the adsorption saturation of activated coke decreases in turn, the overall distribution The adsorption saturation of activated coke decreases from left to right, and increases from top to bottom. The adsorption of activated coke on the side near the flue gas outlet is less, so that some of the activated coke discharged is not fully adsorbed. In this way, part of the fresh active coke is discharged and sent for regeneration, so that the circulation of active coke is increased, and the increase of circulation also increases the power consumption and damage, and the amount of regeneration gas increases, resulting in Energy is wasted. In addition, due to the large saturation of the activated coke in the lower part, the desulfurization efficiency is low. The upper active coke is relatively fresh, so the desulfurization efficiency is higher, and the total desulfurization and denitrification efficiency of the gas outlet is the average of the efficiencies of the upper and lower positions. value, so its desulfurization and denitrification efficiency is not as high as that of convective adsorption

The disadvantages are: because the flue gas enters the absorption tower at the bottom, the air intake area is small, the air velocity in the tower is high, and the bed resistance is large. , The active coke lower hopper, so the space utilization rate in the convective absorption tower is low and the floor area is large. Since the adsorption surface is flat, the active coke recovery part needs to be equipped with multiple valves and pipelines, and the structure is complex

And, the vertical height of the adsorbent bed layer in the absorption tower is higher, if the vertical height is 20 meters, then the pressure on the adsorbent at the bottom of the adsorbent bed layer is very high, which will cause the density of the bottom adsorbent to increase, It is not conducive to the passage of flue gas, and it is easy to cause dust accumulation and sticky groups, which will affect the normal flow of the adsorbent and cause the blockage of the feeding pipe

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