Desulfurization butterfly valve Encyclopedia

The desulphurization butterfly valve is a kind of valve which opens, closes and adjusts the fluid passage by using the disc type open and close parts to and fro rotate about 90 degrees. Desulfurization butterfly valve is not only simple in structure, small in volume, light in weight, low in material consumption, small in installation size, but also small in driving torque, simple and rapid in operation. It also has good flow throttling function and sealing characteristics. It is one of the fastest growing valve varieties in the last decade.

Basic introduction of desulfurization butterfly valve


Desulfurization butterfly valve must meet the requirements of corrosion, wear, flow rate, temperature and so on. All kinds of mineral fuels contain sulphur. Especially coal, after burning, generate a lot of SO2, which seriously pollute the air. In order to control pollution, the most effective way is flue gas desulfurization. At present, the wet desulfurization technology of "lime (limestone) - gypsum" is the most widely used in the world, including China. This process system involves a variety of corrosive media, and contains particulate materials, resulting in strong corrosion and wear of equipment. Therefore, there are special requirements for valve materials and structural forms.

Desulfurization butterfly valve parts material

Body: gray iron, ductile iron, carbon steel

Butterfly plate: carbon steel clad rubber, carbon steel clad fluoroplastics, stainless steel duplex stainless steel plate 1.4529, 2507, C276

Seat: natural rubber, three yuan ethylene propylene rubber

Stem: stainless steel, 2Cr13, 304

Desulfurization butterfly valve performance index

Service life: the desulfurized butterfly valve can be used for more than 10000 times, and it can still ensure that it is "airtight" when closing.

Pressure drop: if the pressure drop is too large, it will increase energy consumption. However, it should be known that the valve is not the only cause of pressure drop in the pipeline system, the pressure drop caused by the following factors. The fluid cross section of the pipe. The friction of the inner wall of the pipe. Changes in flow direction through parts. Fluid characteristics of the desulfurization butterfly valve are equivalent to three times or more of the globe valve, equivalent to 75% of the same size of the gate valve.

Universality: Desulfurization butterfly valve controls and regulates the pipeline system by opening/closing and throttling/balancing. Compared with the gate valve or the globe valve, the desulfurized butterfly valve has better "versatility". Desulfurization butterfly valve has strong chemical corrosion resistance because it can adopt various surface treatment technologies and select flexible material pipeline.

Advantages of desulfurization butterfly valve

1, opening and closing is convenient, fast, labor-saving, low fluid resistance, and can be operated regularly.

2, simple structure, small size and light weight.

3. Mud can be transported and liquid stored at the pipe mouth minimum.

4, low pressure, can achieve a good seal.

5, good regulation performance.

Disadvantages of desulfurization butterfly valve

1, the use of pressure and working temperature range is small.

2, poor sealing.