Flue Gas Desulfurization

The ammonia flue gas desulfurization (FGD) system uses ammonia (ammonia water, liquid ammonia) as an absorbent to react with sulfur dioxide contained in industrial waste gas to remove sulfur dioxide and generate ammonium sulfate as a by-product.

Industry Applications: chemical industry, electric power, steel, coking, smelting, cement, paper making etc.

Technical features of ammonia desulfurization：

• Complete resource utilization - turning waste into treasure

The ammonia recovery technology converts all recovered sulfur dioxide, nitrogen oxides, etc. into fertilizers without generating any waste liquid, waste residue or waste gas, and without any secondary pollution. It is a desulfurization technology that truly converts all pollutants into resources.

• High value by-products

The ammonia recovery process is also the production process of ammonium sulfate. For every ton of liquid ammonia absorbed, 2 tons of sulfur dioxide can be removed and 4 tons of ammonium sulfate can be produced. Taking China as an example, the average price of liquid ammonia is 2000-2500 yuan/ton, and the average price of ammonium sulfate is 400-600 yuan/ton. The desulfurization by-products can offset 80% of the cost of liquid ammonia, greatly reducing operating costs

• Low resistance & saves power consumption

Ammonia desulfurization has high efficiency, .the resistance of the desulfurization tower is only about 850Pa, and the total resistance of the desulfurization island including the resistance of the flue is about 1000Pa. Therefore, ammonia desulfurization equipment can use the original boiler induced draft fan, and do not need extra booster fan; even if the original fan has low air pressure, the fan can be properly modified. The power consumption of the circulation pump has dropped by nearly 70%, and the power consumption saves more than 50% compared with general calcium method.

• Anti-corrosion & reliable operation

Ammonia desulfurization technology uses the world leading anti-corrosion technology and reliable materials. the equipment reliability reaches 98.5%. Desulfurizers and desulfurization products are soluble substances, and the desulfurization liquid in the equipment is clear liquid, without scale accumulation, and no wear on the equipment. It is equipped with automatic control systems such as PLC and DCS, making the control simple and easy.

• Small footprint, friendly for old boiler improvement

Ammonia desulfurization equipment does not require pre-treatment of materials, and the by-product output process is relatively simple. Generally, the total equipment is about 30 sets, and the treatment volume is small, so the equipment selection is small. The land occupation of some desulfurization equipment is related to the design of the boiler. The 75-1000t/h boiler occupies about 150-500㎡; the land occupation of the post-sulfur ammonia system is related to the sulfur content of the boiler, but the correlation coefficient is not large. The entire post-sulfur ammonium system normally occupies less than 500㎡.

• The desulfurization tower has a certain denitrification function and can meet higher environmental protection requirements.

Ammonia desulfurization technology is a desulfurization technology with independent intellectual property rights in my country. It requires less investment and is conducive to its full implementation in my country in the long run. The calcium method, which is currently widely used, is basically imported from abroad, and requires high initial technology transfer fees and technology usage fees during project implementation, making the project investment cost higher.

Ammonia desulfurization technology has been proven to be stable, mature and reliable through theory and engineering practice. If the user produces waste ammonia water, ammonia desulfurization can use it as a desulfurizer to achieve waste treatment, energy conservation and circular economy. The desulfurization by-product can be ammonium sulfate fertilizer, organic compound fertilizer, ammonium sulfite, ammonium bisulfite, which can meet the different needs of different users for by-products and has obvious economic benefits.

MirShine Environmental Protection Technology Co., Ltd. is an environmental protection technology company. it took off and began to develop and explore environmental protection and various desulfurization methods in 2005.

MirShine uses its independently developed ammonia desulfurization technology to specialize in the research, development, exploration and application of ammonia desulfurization and denitrification technologies. By 2015, the fifth-generation technology developed by the company, its core invention patent "Step Separation and Purification Ammonia Desulfurization and Dust Removal Ultra-low Emission Integrated Technology", has become the core supporting technology of ammonia desulfurization in the world, and the results have been identified as internationally advanced.