Desulfurization Wafer Butterfly Valve

Desulfurization Wafer Butterfly Valve

[Butterfly valve] is widely used in: chemical industry, petrochemical, petroleum, papermaking, mining, electric power, liquefied gas, food, pharmaceuticals, water supply and drainage, municipal administration, mechanical equipment supporting, electronic industry, urban construction and other fields.

One of the important components in the flue gas desulfurization device is the valve. The requirement for the desulfurization valve is that it can withstand chlorides, oxides, acids, as well as harsh abrasive wear and mud wear and corrosion. Correct selection of valve materials and structural forms and extending the service life of the valve are the key to flue gas desulfurization butterfly valves.

What is used internationally is the limestone-gypsum wet method, with one furnace and one tower desulfurization device. The desulfurization efficiency of this desulfurization device can reach 95.5%. After the limestone slurry system passes through the desulfurization pipeline, the medium will become highly corrosive, which places extremely high requirements on the entire pipeline system, fluid control valves, and valve actuators. The special butterfly valve for desulfurization is designed and manufactured according to the special requirements of the desulfurization system.

The desulfurization and denitrification butterfly valve is specially designed for the desulfurization and denitrification project of power plants. It fully considers the corrosion and wear of the valve by the desulfurization slurry, ensuring that the valve plate lining is the only part that can contact the slurry, and other parts are not corroded by the limestone (or lime gypsum) slurry. . Therefore, the valve body and valve stem do not need to use expensive alloy (2205) materials, thus greatly saving costs. The unique valve seat design of the desulfurization butterfly valve completely separates the valve body from the fluid medium. Compared with other similar valves, it has a better way of firming the valve seat, fast replacement of the valve seat on site, the valve maintains zero leakage, and has low friction. The butterfly valve plate is made of high-performance alloy (2205) material, which can effectively resist corrosion and wear of the slurry.

The main structure of the desulfurization butterfly valve is composed of the valve body, valve disc, valve seat, valve stem and transmission operating mechanism. The valve seat adopts a detachable structure, and according to the physical and chemical properties of different media, corresponding high temperature resistance and low temperature resistance can be selected. Corrosion-resistant, light-resistant and aging-resistant material.

The inner and outer surfaces of the valve's ductile iron shell can be coated with high-temperature electrostatic spray epoxy resin powder coating. The coating has high corrosion resistance and has extremely high bonding strength with the ductile iron matrix. The coating degree is 0.2-0.5mm.

Desulfurization butterfly valve parts materials and working conditions:

The shell material is made of high-performance ductile iron GGG40
The butterfly plate is made of high-quality alloy low carbon steel 1.4529
The valve shaft is made of high quality stainless steel 2Cr13
Valve seat rubber seal EPDN
The shaft sleeve is made of aluminum bronze

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