Domestic flue gas desulfurization and denitrification is still in the exploration and demonstration stage

Among the common flue gas desulfurization and denitrification technologies, according to the formation mechanism of nitrogen oxides, the technical measures for reducing nitrogen and emission can be divided into two categories:

One is governance from the source. Controlling the formation of NOx during calcination. Its technical measures: ①Use low-nitrogen burners; ②Segmented combustion in the calciner and pipeline to control the combustion temperature; ③Change the batching scheme, use mineralizers, and reduce the clinker firing temperature.

The other type is governance from the end. Technical measures for controlling NOx emissions in flue gas: ① "staged combustion + SNCR", which has been piloted in China; ②selective non-catalytic reduction (SNCR), which has been piloted in China; ③selective catalytic reduction (SCR) At present, there are only three lines of experiments in Europe; ③ SNCR/SCR combined denitrification technology, domestic cement denitrification has no successful experience; ④ Biological denitrification technology (in the research and development stage).

Domestic denitrification technology is still in the stage of exploration and demonstration, and has not yet been scientifically summarized. Are the various design process technical routes and equipment facilities scientific and reasonable, and are they reliable in operation? The denitrification efficiency, operating cost, energy consumption, and the amount of secondary pollutant discharge will all be tested in practice.

When we use flue gas desulfurization and denitrification technology, how to preserve the product is a very important aspect, whether in the process of use or in the process of transportation and storage. So, what aspects should we pay attention to in this process? This is a question we are going to introduce to you today, let's take a look at it below.

1. During the transportation of the wet desulfurizer, care should be taken to prevent a large amount of vibration and friction caused by mixing it with hard substances, so as to reduce the breakage of carbon particles and affect the use.

2. Blistering is strictly prohibited. This product is a porous adsorbent, so it is necessary to prevent water immersion during transportation, storage and use. After water immersion, a large amount of water will fill the pores of the activated carbon, making the activated carbon useless.

3. It should be stored in a cool and dry place to prevent the inner and outer bags of the package from breaking, direct contact with the outside world, absorbing other substances, and reducing the ability to absorb H2S and the use effect.

4. Fire prevention, during storage or transportation, prevent direct contact with fire sources to prevent fire.

5. Prevent tar substances. During production and operation, it is forbidden to bring tar substances into the activated carbon bed, because after the surface of the activated carbon particles is covered with such substances, it will fill the pore channels of the activated carbon and make it useless. Therefore, when the gas enters the front of the activated carbon bed, if it contains tar substances, a tar removal device should be added to ensure the normal use of the activated carbon.