Wet Flue Gas Desulfurization
Wet flue gas desulfurization is one of the core technologies for controlling sulfur dioxide (SO₂) emissions in flue gas. It is widely used in high-sulfur flue gas emission industries such as coal-fired power plants, steel metallurgy, cement, and waste incineration.
This process mainly sprays alkaline absorption liquid (such as limestone slurry) into the flue gas to react with SO₂ to generate sulfites and sulfates, which are finally converted into gypsum and other substances for discharge.
★The main features of wet flue gas desulfurization are as follows:
The desulfurization efficiency is extremely high, usually up to 95% to 99%, which can meet strict environmental emission standards and is especially suitable for ultra-low emission transformation.
The process technology is mature and stable, and the equipment operation is reliable, which is suitable for industrial occasions with long-term continuous operation.
The by-products can be recycled, and the gypsum generated by the reaction can be used as building materials to achieve partial resource recovery.
The system is relatively complex and occupies a large area. It requires the construction of an absorption tower, a limestone pulping system, a slurry circulation system, and a gypsum dehydration system.
There is a demand for wastewater treatment. Salt-containing wastewater will be generated during the desulfurization process, and supporting water treatment facilities are required. Environmental protection management requirements are high.
The operation and maintenance intensity is relatively high. The system needs to regularly check corrosion, clean nozzles, and manage slurry scaling.
★Wet Electrostatic Precipitator (WESP)
Wet electrostatic precipitator is an advanced ultrafine particle and aerosol control technology. It is mainly used to capture ultrafine particles, fine droplets, acid mist, heavy metals (such as mercury, lead) and gaseous organic matter in flue gas. It is often used as a terminal treatment equipment for deep flue gas purification.
Its working principle is to ionize particles under high voltage electric field. The charged particles are adsorbed on the plate or pole tube under the action of electric field force, and the dust is removed by continuous spraying and flushing to keep the system clean and efficient.
The main features of wet electrostatic precipitator include:
The dust removal efficiency is very high, and the removal rate of PM2.5 and submicron particles, acid mist, etc. can reach more than 90%. It is a key equipment for achieving ultra-clean emissions.
It is suitable for wet, low-temperature and high-humidity working conditions, and can effectively handle fine impurities that traditional dry dust collectors cannot efficiently capture.
The equipment operates stably, has low pressure loss, consumes less electricity, and has a long maintenance cycle.
It has a compact structure and can be integrated with the desulfurization tower. It is often used as a deep purification link for flue gas after wet desulfurization to further reduce particulate matter and heavy metal emissions.
No secondary dust will be generated during operation because the collection surface is always kept wet, which is suitable for occasions with high hygiene requirements or corrosive gases.
The investment and construction costs are relatively high, and it is mainly used in industrial projects with high emission standards, such as steel, chemical, non-ferrous metal smelting and waste incineration industries.
★The significance of using both together
Wet desulfurization and wet electrostatic precipitator are often used as a combination of flue gas treatment systems, in which wet desulfurization is used to efficiently remove SO₂, while wet electrostatic precipitator is used to further purify fine particulate matter, heavy metals and droplets in the flue gas after desulfurization, which is particularly suitable for industrial occasions that need to achieve ultra-low or near-zero emissions.
For example, in the treatment of exhaust gas from waste incineration or steel sintering, the combined use of the two can significantly reduce the emissions of SO2, acid mist, dust, heavy metals and odor pollutants in the flue gas to meet the latest environmental limit standards.

★Company Introduction

Yancheng Hongcheng Chaoyu Environmental Protection Co., Ltd. is a national high-tech enterprise specializing in the research and development, production, sales, installation, commissioning and service of environmental protection and energy-saving equipment such as atmospheric environment treatment, waste gas treatment and sewage treatment. It is a well-known domestic manufacturer, system integrator and general contractor of dust removal, desulfurization and denitrification, ultra-low emission, waste gas treatment and sewage treatment equipment. The various types of dust removal equipment, desulfurization and denitrification equipment, sewage treatment and other environmental protection and energy-saving equipment produced by the company are advanced in technology and reliable in quality. They are widely used in thermal power, coking, garbage power generation, chemical industry, papermaking, steel, metallurgy, carbon, glass, cement building materials and other industries. The products are sold to more than 20 provinces and cities across the country and have been widely praised by customers.

★Factory Appearance

★FAQ

Q. How high is the dust removal efficiency of bag filters?
A. The dust removal efficiency can generally reach more than 99%, and can effectively filter fine dust above 0.3 microns.

Q. Can bag filter handle high temperature gas?
A. It can handle high temperature gas up to about 250℃. It needs to use high temperature resistant filter material and control the temperature and humidity of the gas.

Q. How to extend the service life of bag filter?
A. Choose appropriate filter material, clean dust on time, avoid high temperature shock and dust blockage, and perform regular inspection and maintenance.