Preparation method of semicoke-loaded manganese-copper adsorbent for dry desulfurization and denitrification

Abstract

The invention discloses a preparation method of a semicoke-loaded manganese-copper adsorbent for dry desulfurization and denitrification. With semicoke as a carrier, metal components are loaded on thesemicoke surface through ultrasound-assisted high-pressure impregnation to obtain a series of Mn-Cu adsorbents. The method has the advantages of easiness in operation and low cost; the prepared Mn-Cuadsorbent can stably realize 80% of NO denitrification rate and 90% of SO2 desulfurization rate; the NO removal efficiency is maintained at over or equal to 80% of penetration time, and the penetration nitrate can reach 300 min and 10.07 mg / g; the SO2 removal efficiency is maintained at over or equal to 90% of penetration time, and the penetration sulfur can reach 184 min and 14.62 mg / g.

Description

Technical field [0001] The invention relates to the field of environmental protection, in particular to a preparation method of a semi-coke loaded manganin adsorbent for dry desulfurization and denitration. Background technique [0002] In the traditional combined treatment process, the waste water and waste gas produced after wet desulfurization require more equipment and more complicated processes, which increases investment and operating costs, and also reduces the safety of the system. A large amount of soluble salts are discharged. There is no effective solution yet. Current dry or semi-dry technology and SO 2 The gas-solid phase or gas-liquid phase reaction occurs, and the reaction effect is not ideal. In the SNCR technology, 10-20% ammonia or urea solution is sprayed into the high temperature reaction zone, which causes the temperature in the reaction zone to drop rapidly, causing uneven temperature gradient in this zone, and reducing the denitration efficiency of flue ga...

AI Technical Summary

Problems solved by technology

[0002] In the traditional combined treatment process, the waste water and waste gas produced after wet desulfurization require more equipment and more complicated processes, which increases investment and operating costs, and also reduces system safety. A large amount of soluble salts discharged by it, There is currently no effective solution

Current dry or semi-dry technology and SO 2 The gas-solid phase or gas-liquid phase reaction occurs, and the reaction effect is not ideal

In the SNCR technology, 10-20% ammonia or urea solution is sprayed into the high-temperature reaction zone, resulting in a rapid drop in temperature in the reaction zone, resulting in uneven temperature gradients in this zone, which in turn reduces the denitrification efficiency of flue gas. The efficiency of SNCR technology is only 30-50%; the catalyst used in SCR technology is easily poisoned and the price is usually relatively expensive, and its raw material cost can account for 20-40% of the total cost of the SCR system, reaching 40% to 50% of the operating cost to make

[0003] The problem of dry desulfurization technology lies in the recycling of adsorbent and the utilization of adsorption products. The recycling of adsorbent has always been the direction of continuous research. Among them, the desulfurization efficiency of high-energy electron oxidation can reach more than 90%, but it consumes a lot of energy. It is not suitable for application; the charged dry desulfurization method has less pollution, but the desulfurization efficiency is not high; the discharge plasma catalytic method uses the high energy in the plasma to produce a catalytic effect, and this strong reduction performance will reduce SO 2 Reduction to elemental sulfur, this method can be used to produce elemental sulfur, less polluting, and has certain economic value, but this method consumes a lot of energy and is not suitable for application

Images