Which process is the best for flue gas desulfurization and denitrification in coking plant? Sorry fo

The process selection of flue gas desulfurization and denitrification in coking plants needs to consider a variety of factors, including flue gas composition, treatment efficiency, investment cost, operating cost, etc. At present, the commonly used desulfurization and denitrification processes are as follows:

1.Flue gas wet desulfurization - this process usually uses lime milk or gypsum milk for desulfurization, which has high desulfurization efficiency, but the operating cost is high, and the large amount of wastewater produced may also cause environmental pollution.

2.Flue gas dry desulfurization - this process is usually used for the desulfurization treatment of high-temperature flue gas such as coal-fired boilers, and the investment cost and operating cost are low, but the desulfurization effect is poor compared with the wet process, and dust treatment is also required.

3.Selective Catalytic Reduction Denitrification – This process typically uses ammonia as a reducing agent to reduce nitrogen oxides to low levels through selective catalysts. The process has high denitrification efficiency and relatively low ammonia cost, but it requires strict management of ammonia storage and transportation.

To sum up, the selection of flue gas desulfurization and denitrification of coking plant needs to be comprehensively considered according to the specific situation, and the appropriate process should be selected for treatment.

The desulfurization and denitrification process of our factory is: magnesium desulfurization, ammonia **, ozone plus hydrogen peroxide denitrification process.

Technical features: 1. Desulfurization and denitrification are integrated, with small footprint and low equipment and operating costs.

2.There is no flue gas with ammonia and other secondary pollution.

3.Easy maintenance and low maintenance costs.

4.It has an automatic control safety interlock system to ensure that there is no danger in the state of power failure.

5.After treatment, the sulfur dioxide and dust of the flue gas can reach single digits, and the nitrogen oxides can reach less than 30.

6.The docking of the coke oven with the desulfurization tower does not need to stop the furnace, and the equipment docking can be completed after only a few days of production reduction.

Daewoo circulating fluidized bed flue gas desulfurization.

The selection of desulfurization and denitrification process in coking plant needs to consider a variety of factors, including flue gas delayed and indiscriminate transportation components, treatment efficiency, investment costs, operating costs, etc.

At present, the commonly used desulfurization and denitrification processes are as follows:

Flue gas wet desulfurization. This process usually uses lime milk or gypsum milk for desulfurization, which has a high desulfurization efficiency and beam rate, but the operating cost is high, and the large amount of wastewater produced may cause environmental pollution.

Flue gas dry desulfurization.

Selective catalytic reduction denitrification. This process typically uses ammonia as a reducing agent to reduce nitrogen oxides to low levels through selective catalysts. The process has high denitrification efficiency and relatively low ammonia cost, but it needs to be strictly managed for the storage and transportation of ammonia.

Characteristics of flue gas in coking plants.

1. The temperature range of coke oven flue gas is basically 180-300 degrees, and the temperature fluctuation range is large;

2. The composition of coke oven flue gas is complex, and the NOx content is high, and the concentration is generally 350mg NM3-1200mg NM3;

3. The flue gas of the coke oven in Zhenzhou contains S02, which is slowly shielded in the temperature range of 180 degrees to 230 degrees, and S02 is easy to react with ammonia to convert into ammonium sulfate, resulting in pipeline blockage and equipment corrosion;

4. The coke oven chimney must always be in a hot standby state. That is to say, after the flue gas is desulfurized and denitrified, the final discharge temperature must be guaranteed to be about 130 degrees.

Coking plant selectionSDS sodium bicarbonate dry desulfurizationCauses.

1.Wide range of applications.

SDS sodium bicarbonate dry desulfurizationSuitable for all types of flue gases, including sulphur dioxide in coking plant flue gases. Therefore, SDS sodium bicarbonate dry desulfurization can meet the desulfurization needs of coking plants.

2.High desulfurization efficiency.

SDS sodium bicarbonate dry desulfurizationThe sulfur dioxide in the flue gas can be removed in a relatively short time, and the desulfurization efficiency is high, which can effectively reduce the environmental impact of the coking plant.

3.No secondary pollution.

SDS sodium bicarbonate dry desulfurizationAfter treatment, there is no secondary pollution problem, which can reduce the investment cost of secondary pollution treatment in the second brigade cave of the coking plant and reduce the impact on the environment.

4.The technology is mature.

SDS sodium bicarbonate dry desulfurizationIt has been widely used in industrial production, with mature technology, simple operation and easy implementation.

1. The temperature is not high.

2. Ingredients.

3. The sulfur content is not high.

The reason for the selection of SDS desulfurization for flue gas desulfurization in coking plants.

When coking enterprises are in production, the main flue gas component is sulfide, which is toxic, which will seriously damage the surrounding environment, affect human health and corporate image, so it is necessary to desulfurize the flue gas.

The significance of flue gas desulfurization in coking plants:

1. It can prevent the corrosion of equipment, reduce equipment maintenance costs and reduce production costs.

2. Improve the quality of coke oven gas, reduce the pollution generated by coke oven gas combustion, and protect the surrounding environment.

3. Reducing the content of hydrogen sulfide in the gas used by iron and steel enterprises can enable iron and steel enterprises to produce high-quality steel.

4. The sulfur can be used in the fields of medicine and chemical industry.

Based on the significance of flue gas desulfurization in coking plants, Boleda SDS dry desulfurization can perfectly meet the choice of flue gas desulfurization in coking plants

SDS dry desulfurization is the use of desulfurization reactor to inject flue gas and sodium bicarbonate (baking soda) into the desulfurization reactor at the same time, under the action of additives, sodium bicarbonate is activated by high temperature, decomposed into sodium carbonate, sodium carbonate and flue gas are highly mixed, sodium sulfate and other sodium salts are generated, so that the flue gas is discharged up to the standard.

Advantages of using SDS dry desulfurization system:

1.It can continue to meet the emission standards, and the desulfurization efficiency is more than 95%;

2.The equipment occupies a small area, the site is not restricted, the power consumption rate is low, the failure rate is also low, and the equipment life is increased;

3.The low temperature of the desulfurization system only needs about 10 °C, 4The desulfurization system runs in a dry state, there is no wastewater treatment and discharge problem, there is no chimney land combustion and tailing site, no need for whitening, no secondary pollution.

The dust from the flue gas desulfurization and denitrification of the coking plant can be used for a variety of purposes, such as:

1.Make concrete admixture: Dust is incorporated into concrete, which can enhance the durability and compressive strength of concrete.

2.Used in the steel industry: The dust of the coking plant contains a certain amount of iron, which can be used to make steel after proper treatment in Chunqing.

3.Raw cement scraping material: The dust of the coking plant contains a certain amount of calcium oxide and silicate and other substances, which can be used as raw materials for cement.

4.Used as soil amendment: The dust of the coking plant contains a certain amount of organic matter, which can be used as a soil amendment to improve the fertility of the soil.

It should be noted that because the dust from the flue gas desulfurization and denitrification of the coking plant contains certain harmful substances and heavy metals, it needs to be fully treated and tested before use to ensure that it does not cause harm to the environment and human health.

Dear, hello, I am happy to solve the problem for you, the flue gas comes out of the kiln, and then the desulfurization and denitrification device filled with solid desulfurizer completes the desulfurization task, and a section of ammonia-free denitrification catalyst is installed on the desulfurizer to complete the function of deslipping and nitrification. The sulfur-containing and nitrate-containing flue gas passes through the desulfurization and denitrification tank, and the sulfur oxides and nitrogen Xinchun oxides in the flue gas are effectively removed to meet the requirements of the manufacturer and the local area, and then enter the chimney for discharge through the 1 fan. The denitrification catalyst and desulfurizer in the early blind placement are released from the lofting valve at the bottom after the part that comes into contact with the bottom layer reaches desulfurization saturation, and fresh desulfurizer is added to supplement it.

The process flow of desulfurization and denitrification is that the flue gas enters the desulfurization device and contacts with the alkaline limestone slurry droplets in reverse current, in which the acid oxides and other pollutants HCL and HF are absorbed, and the slurry reaction after the smoke absorbs SO2 to form CaSO3.

Desulfurization is the removal of sulfate or sulfur-containing groups, denitrification generally refers to the removal of nitro, and deacidification refers to the removal of the acidity of the substance and the restoration of neutrality. There are three main types of flue gas simultaneous desulfurization and denitrification technologies, the first type is the combination technology of flue gas desulfurization and flue gas denitrification; The second type is the use of adsorbents to remove SOX and NOx at the same time; The third type is to modify the existing flue gas desulfurization (FGD) system (such as adding denitrification agent to the desulfurization solution, etc.) to increase the denitrification function.

Application of flue gas desulfurization and denitrification:

Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology applied to the chemical industry where multiple nitrogen oxides and sulfur oxides are generated. Nitrogen oxides and sulfur oxides are one of the main causes of air pollution.

Therefore, the application of this technology has many benefits for ambient air purification. The known flue gas desulfurization and denitrification technologies include PAFP, ACFP, pyromanganese ore method, electron beam ammonia method, pulse corona method, gypsum wet method, catalytic oxidation method, microbial degradation method and other technologies. <>

The process flow of flue gas desulfurization and denitrification is as follows:

1. The flue gas enters the Naxiao dust collector for the removal of coarse dust to reduce the impact on the follow-up equipment.

2. The flue gas enters the flue gas purification tower for flue gas desulfurization. Wet desulfurization technology is usually used, in which the spray liquid is atomized and sprayed into the flue gas to absorb the sulfur dioxide in it to form gypsum.

3. The flue gas enters the denitrifier for denitrification. Selective Catalytic Reduction (SCR) technology is typically used to reduce nitrogen oxides to nitrogen and water by spraying ammonia into the flue gas.

4. The treated flue gas enters the dehumidifier for dehumidification to ensure that the flue gas emission meets environmental protection standards.

5. Flue gas is discharged into the atmosphere through the chimney.

Flue gas desulfurization and denitrification:

It refers to the use of chemical or physical methods to remove harmful gases such as sulfur dioxide and nitrogen oxides produced by combustion to reduce environmental pollution and harm to the human body. Among them, flue gas desulfurization refers to the removal of sulfur dioxide in flue gas to prevent environmental problems such as acid rain. Flue gas denitrification refers to the removal of nitrogen oxides from flue gas to reduce air pollution and the production of harmful substances such as ozone. <>