AGRM News

Innovation and Technology

Russian

info@agrmeng.com

environmental-equipment

AGRM environmental equipment For Kiln

The environmental equipment in the kiln system is an essential component that ensures an eco-friendly production process and compliance with environmental standards. These environmental devices are designed to effectively reduce emissions of harmful gases and particulate matter, minimizing pollution to the air, water, and soil.

AGRM environmental equipment

The environmental equipment in the kiln system plays a critical role in promoting eco-friendly production processes and sustainable development. Through efficient flue gas treatment, wastewater treatment, and energy recovery technologies, these environmental devices mitigate the adverse impacts of industrial activities on the natural environment, fostering green production and sustainable industries.

environmental-equipment

EP Equipment

environmental-equipment

Waste Heat Boiler

environmental-equipment

Dust Removal System

environmental-equipment

Full Oxygen Combustion DeNOx Equipment

Desulfurization Equipment

EP

Electrostatic precipitator (EP) is an electronic dust removal system used to control particulate matter in exhaust gases, especially challenging-to-treat dust. It is commonly employed in industries with severe heavy metal pollution, such as lead oxide and fluoride industries.

We can provide customized technical solutions and equipment based on the specific needs of our clients, ensuring compliance with local environmental regulations.

Waste Heat Boiler

Due to the unique characteristics of full oxygen combustion, the exhaust gases discharged through the flue without a heat storage chamber have high temperatures and high water vapor content. Directly venting these gases would result in significant waste.

Dust Removal System

Compared to traditional air-assisted combustion glass furnaces, the exhaust gases from full oxygen combustion furnaces have significantly reduced dust content due to the absence of periodic reversal actions and the high water vapor concentration in the flame space, reaching up to 50%. For most enterprises and regions, direct compliance with emission standards can be achieved. However, for certain glass products with special formulations, the exhaust gases still need to undergo dust removal treatment to meet the standards.

Due to the unique characteristics of full oxygen combustion furnaces, the exhaust gases exhibit high temperatures and high water vapor concentrations. This requires careful consideration when designing solutions and selecting equipment, taking into account the specific characteristics of each furnace.

Common dust removal systems used for full oxygen combustion include bag filters, electrostatic precipitators (EP), and wet scrubbers. The selection of the system should be determined based on the specific circumstances and requirements.

Full Oxygen Combustion DeNOx equipment

Although full oxygen combustion furnaces do not introduce nitrogen into the air during combustion, NOx can still be generated in the exhaust gases. Whether the direct emissions meet the standards depends on the amount of nitrogen introduced.

Due to the unique characteristics of full oxygen combustion, the treatment of NOx in the exhaust gases differs from that of air combustion furnaces.

We have accumulated rich practical experience in this field and can provide you with different combinations to meet your specific needs.

Desulfurization Equipment

Flue gas desulfurization (FGD), also known as “flue gas desulfurization” or “exhaust gas desulfurization,” refers to the technology of removing sulfur oxides from flue gases or other industrial waste gases. There are two main types of FGD: dry FGD and wet FGD. Dry FGD uses absorbents or adsorbents such as lime powder, activated carbon, and activated manganese oxide, while wet FGD uses absorbents such as ammonia solution and sodium hydroxide. Among them, the flue gas desulfurization technology for coal-fired flue gases is currently the most widely used and efficient desulfurization technology. For coal-fired power plants, FGD will be the main method for controlling SO2 emissions for a considerable period in the future.

Wet FGD Process

The wet FGD process is similar in process, form, and mechanism in various countries worldwide. It mainly uses slurry, such as limestone (CaCO3), lime (CaO), or sodium carbonate (Na2CO3), as the scrubbing agent to wash the flue gas in the reaction tower and remove the SO2 from the flue gas. This process has a history of 50 years and, after continuous improvement and refinement, has become a mature technology. It has advantages such as high desulfurization efficiency (90% to 98%), large unit capacity, strong adaptability to coal types, low operating costs, and easy recovery of by-products.

The main chemical reactions in the lime or limestone process are as follows:

Lime process: SO2 + CaO + 1/2H2O → CaSO3·1/2H2O

Limestone process: SO2 + CaCO3 + 1/2H2O → CaSO3·1/2H2O + CO2

The main advantage is that it can be widely developed for commercial purposes, and the absorbents used are resource-rich, low-cost, and the waste residue can be either discarded or recycled as commercial gypsum. Currently, the lime/limestone process is the most widely used FGD process in the world. It can achieve a desulfurization efficiency of over 90% for high-sulfur fuels and over 95% for low-sulfur coal.

The traditional lime/limestone process has potential drawbacks, mainly manifested in equipment scaling, blockage, corrosion, and wear. To address these issues, equipment manufacturers have developed second and third-generation lime/limestone desulfurization process systems using various methods.

In the wet FGD process, the reheating of flue gas directly affects the investment of the entire FGD process. After desulfurization through the wet FGD process, the flue gas temperature is generally low (around 45°C) and is mostly below the dew point. If the flue gas is directly discharged into the chimney without reheating, it can easily form acid mist, corrode the chimney, and hinder the diffusion of flue gas. Therefore, wet FGD systems are generally equipped with flue gas reheating systems. Currently, the widely used technology is the regenerative (rotary) type flue gas heat exchanger (GGH), which is mature in technology. GGH is relatively expensive and accounts for a high proportion of the investment in the entire FGD process.

In the case of full oxygen combustion technology using natural gas as fuel, desulfurization is not necessary for the exhaust gases.

For customers who need to reduce costs and use petroleum coke or coal tar, coke oven gas, or heavy oil, we recommend using desulfurization tower technology for desulfurization.

Message WhatsApp
Top