How do you remove ammonia from fly ash?

The most commonly used denitrification technology is to use ammonia or urea as a reducing agent, but ammonia escape cannot be avoided in the denitrification process, part of the escaped ammonia is mixed in the flue gas and discharged, and the other part is residual in the fly ash in the form of NH4HSO4 and (NH4)2SO4, and enters the cement concrete hydration system with the fly ash. In some practical engineering applications, the application of desulfurization and denitrification fly ash has the following problems: (1) there is a pungent ammonia smell after pouring, which affects personal safety; (2) The setting time of cement concrete is prolonged, and the working performance of concrete is greatly reduced; (3) After pouring, due to the presence of ammonia, more unevenly dispersed bubbles will emerge; (4) After the concrete is hardened, there are yellow spots or bubble marks on the surface; (5) If the ammonia content is too high, it will accumulate in the concrete, which will lead to the increase of concrete gas content, the expansion of concrete volume and the decrease of strength; (6) The ammonia gas overflowed during the concrete setting and hardening process will be enriched on the surface of the steel bar, resulting in the decrease of the gripping force between the concrete and the steel bar, so that the concrete will lose its protective effect on the steel bar.

In view of this, it is necessary to provide a removal method for residual ammonium components in fly ash to reduce the ammonium content in fly ash, ensure the quality stability of fly ash, and improve the quality of concrete engineering.

If you want to remove ammonia from fly ash, you can use something acidic, because ammonia is alkaline, and it will not be emitted when it encounters acid.

Hello, glad to answer for you. It takes a little time to type, please wait a while, thank you The most commonly used denitrification technology is to use ammonia or urea as a reducing agent, but ammonia escape cannot be avoided in the denitrification process, and part of the escaped ammonia is mixed and discharged in the flue gas, and the other part is left in the fly ash in the form of NH4HSO4 and (NH4)2SO4, and enters the cement concrete hydration body with the fly ash.

How to deal with it. Most of it can be removed after drying, and it can also be appropriately sprayed with dilute sulfuric acid and dilute nitric acid. But don't overdo it with dilute acids.

What the situation. How to remove it.

We did that.

How to spray it? The dry ones can be dried directly.

It's all dusty.

Say the exact way.

Commonly used chemicals to remove ammonia from slime include sodium hydroxide (NaOH), blunt potassium hydroxide (KOH), sodium chloride (NaCl), etc. The application of these raw materials involves dissolving them in water to form a solution, which is then mixed with slime to remove ammonia through a chemical reaction. Specifically, mixing the slime into the alkaline solution can make the ammonia gas form ammonia, which can then react with some chemicals to form non-volatile compounds, so as to achieve the goal of ammonia removal.

This method is often referred to as the chemisorption method, and its treatment effect will be affected by factors such as the concentration of ammonia in the slime, the type and amount of raw materials to be treated, and the treatment time. It should be pointed out that special attention needs to be paid to the safety of these chemical raw materials during operation, and at the same time, environmental requirements need to be paid attention to when removing ammonia from the slime. It is recommended that the treatment experiment and protocol of the trembling stool must be clarified before using these chemical raw materials for treatment to ensure its safety and effectiveness.

It is best to have a professional handle it.

Summary. Hello, this one is not affected by temperature. (1) There is a pungent ammonia smell after pouring, which affects personal safety; (2) The setting time of cement concrete is prolonged, and the working performance of concrete is greatly reduced; (3) After pouring, due to the presence of ammonia, more unevenly dispersed bubbles will emerge; (4) After the concrete is hardened, there are yellow spots or bubble marks on the surface; (5) If the ammonia content is too high, it will accumulate in the concrete, which will lead to the increase of concrete gas content, the expansion of concrete volume and the decrease of strength; (6) The ammonia gas overflowed during the concrete setting and hardening process will be enriched on the surface of the steel bar, resulting in the decrease of the gripping force between the concrete and the steel bar, so that the concrete will lose its protective effect on the steel bar.

Hello, this is not blindly affected by the temperature grinding fingers. (1) There is a pungent ammonia smell after pouring, which affects personal safety; (2) The setting time of cement concrete is prolonged, and the working performance of concrete is greatly reduced; (3) After pouring, due to the presence of ammonia, bubbles will emerge that are more dispersed and uneven than those of comics; (4) After the concrete is hardened, there are yellow spots or bubble marks on the surface; (5) If the ammonia content is too high, it will accumulate in the concrete, which will lead to the increase of concrete gas content, the expansion of concrete volume and the decrease of strength; (6) The ammonia gas overflowed during the concrete setting and hardening process will be enriched on the surface of the steel bar, resulting in the decrease of the gripping force between the concrete and the steel bar, so that the concrete will lose its protective effect on the steel bar.

How do I get rid of ammonia odor?

The most commonly used denitrification technology is to use ammonia or urea as a reducing agent, but ammonia escape cannot be avoided in the denitrification process, and part of the escaped ammonia is mixed in the flue gas to discharge the mold, and the other part is left in the fly ash in the form of NH4HSO4 and (NH4)2SO4, and enters the cement concrete hydration system with the fly ash.

The use of desulfurizers, mainly: CaCO3 CAO, etc.

Desulfurizer generally refers to the agent that removes free sulfur or sulfur compounds from fuel, raw materials or other materials; In the control and treatment of pollutants, it mainly refers to the chemicals used to remove sulfur oxides (including SO2 and SO3) in exhaust gases. Various basic compounds can be used as desulfurizers. The most common desulfurizers used to remove sulfur dioxide from flue gas are cheap lime, limestone and alkaline solutions prepared with calcareous agents.

The desulfurizer absorbs most of the sulfur dioxide in the flue gas and fixes it in the fuel residue. Chemical plants, smelters, etc. often use sodium carbonate, alkaline aluminum sulfate and other solutions as desulfurizers to treat sulfur-containing tail gas, and can be desorbed and utilized. This mixed solution desulfurizer has surface activity, catalytic oxidation, can promote the direct reaction of SO2, accelerate the dissolution of CaSO3, promote the rapid oxidation of CaSO3 to CaSO4, strengthen the precipitation of CaSO4, reduce the liquid-gas ratio, reduce the calcium-sulfur ratio, and reduce the evaporation of water.

When the concentration of SO2 at the flue gas inlet increases and is higher than the design value, the pH value in the reaction cell of the absorption tower decreases, and a larger Ca-S ratio is required, CaCO3 can be quickly dissolved without expanding the volume of the reaction cell of the absorption tower, increasing the concentration of calcium ions, keeping the pH value of the slurry in the normal range, and having a certain buffering effect on the pH value. Extending the running time of the slurry in the working section and reducing the number of slurry dispensing can significantly reduce the scale of the equipment, the scale layer becomes thinner, and the scale layer is easy to fall off after washing with water after the shutdown. It has the dispersion and activity of the desulfurization system scaling, reduces the siltation of scaling, reduces the content of chloride ions in the slurry, and reduces the corrosion and scaling rates of various materials in the desulfurization equipment to varying degrees, among which carbon steel reduces the most, and the corrosion and scaling rates can be reduced by 74% and 79% respectively, and polyvinyl chloride can be reduced by 48% and 55%.

The addition of desulfurizer can play a role in scaling, corrosion and corrosion inhibition, reduce the blockage, scaling, corrosion and wear of the desulfurization nozzle, reduce the scaling, corrosion and wear of the slurry circulation pump and impeller, and reduce the maintenance and replacement of spare parts in the desulfurization system. Broaden the choice of desulfurization materials and improve system reliability. Under different working conditions, the slurry circulating pump and oxidation fan can be reduced and stopped, the desulfurization efficiency can be improved, the operating cost can be reduced, and the sulfur content in the coal can be changed, and the high sulfur coal can be applied.

In the application of flue gas desulfurization, it has broad market promotion advantages and can produce considerable economic and social benefits.

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Ammonia gas will be released when the ammonium salt is mixed with alkali, so take an appropriate amount of black substance mixed with hydrated lime and grind it in a mortar, smell the ammonia smell, and then use moist litmus test paper to detect, the test paper turns blue, proving that the black substance contains ammonium salt.

Many substances, such as black copper oxide, can catalyze the decomposition of hydrogen peroxide. Therefore, to prove that the black substance must contain manganese dioxide, the quality and chemical properties of manganese dioxide must also be verified.