Desulfurization pumps are mostly used in the desulfurization process of power plants. Wet flue gas desulfurization (FGD) is the most effective and widely used technology to control the emission of sulfur dioxide (SO2) in coal-fired power plants. Next, we will briefly introduce the types of flue gas desulfurization, wet desulfurization and desulfurization pump.

1、 Types of flue gas desulfurization process in power plant

According to the state of desulfurizer and desulfurization reaction products, the flue gas desulfurization process of power plant can be divided into wet method, dry method and semi dry method.

1. Wet desulfurization process the process flow, form and mechanism of wet flue gas desulfurization in countries all over the world are similar, mainly using alkaline solution as desulfurizer to absorb SO2 in flue gas.

Wet desulfurization processes mainly include: Limestone / lime gypsum method, seawater method, double alkali method, sodium sulfite circulation method, magnesium oxide method, etc.

2. The application of dry desulfurization process in power plant flue gas desulfurization began in the early 1980s.

Dry desulfurization processes mainly include: charged dry desulfurization, absorbent spray desulfurization, electron beam irradiation, adsorption, etc.

3. Semi dry desulfurization process combines the advantages of wet and dry desulfurization process, and has broad application prospects.

Semi dry desulfurization process mainly includes: spray drying method, circulating fluidized bed method, humidifying ash circulation method, flue gas injection method, etc. At present, wet desulfurization technology is dominant in flue gas desulfurization technology, and dry and semi dry desulfurization processes are also developing.

2、 Limestone / lime gypsum process

Limestone / lime gypsum method is the most mature, applied and stable method, and its desulfurization efficiency is more than 95%. Limestone / lime gypsum wet method is the most widely used desulfurization method in 300MW and above units. More than 90% of large thermal power plants in the world (such as Germany and Japan) adopt wet limestone / lime gypsum flue gas desulfurization process. At present, limestone / lime process is the most widely used FGD process in the world. For high sulfur coal, the desulfurization rate can be more than 90%, and for low sulfur coal, the desulfurization rate can be more than 95%.

3、 Desulfurization pump

Desulfurization pump is a single-stage, single suction, axial suction cantilever horizontal centrifugal pump, which is mainly designed to meet the flue gas desulfurization system of thermal power plant and is used to transport limestone, gypsum and other slurry

The impeller of desulfurization pump is made of high-strength wear-resistant and corrosion-resistant material (A49 or cr30a), which is suitable for conveying strong corrosion and high concentration slurry with good acid resistance.

Our company has advanced desulfurization pump production line, integrating design and manufacturing services, and can provide DT desulfurization pump, TL desulfurization pump, LC desulfurization pump accessories and complete machine supporting equipment for our customers. Welcome to inquire.