How to select roots blower in desulfurization
The most important feature of Roots blower is that when the pressure is adjusted within the allowable range, the flow rate changes little, the pressure range is wide, and it has the characteristics of forced gas transmission. The medium does not contain oil during transportation. It has the advantages of simple structure, convenient maintenance, long service life and small vibration.
Vacuum pump. Due to the periodic suction, exhaust and instantaneous constant volume compression, the velocity and pressure pulsation of the gas flow will be produced, which will cause larger aerodynamic noise. In addition, the gap between rotors and between rotors and cylinders will cause gas leakage, thus reducing the efficiency. The displacement of Roots blower is 0.15-150 m3 / min and the speed is 150-3000 rpm. The single-stage pressure ratio is usually less than 1.7, up to 2.1.
1、 Main media
The conveying medium of Roots blower is clean air, clean gas, sulfur dioxide and other inert gases. It is the first choice for special gas industry (gas, natural gas, biogas, carbon dioxide, sulfur dioxide, etc.) and high pressure conditions. In view of the above characteristics, it can be widely used in metallurgy, chemical industry, chemical fertilizer, petrochemical, instrument, building materials industry.
According to the shape of the rotor, "roots blower" is divided into two blade type and three blade type. Each time the three blade rotor rotates, two rotors carry out three suction and exhaust. Compared with the two blade profile, the gas pulsation, vibration and noise are small
The speed of Roots blower is 150-3000 rpm. The flow rate is 0.15-1200 m3 / min, the pressure is 9.8-196 kPa, the power is 0.75-1000 kW, and the unit weight is 100-9000 kg.
stay 「 Desulfurization and oxidation 」 In pressure selection, the pressure calculation is similar to aeration, mainly based on the density and depth of liquid in desulfurization tower or absorption tower. The specific calculation method is as follows: liquid density in the tower x liquid depth in the tower 「 Roots blower for desulfurization and oxidation 」 The height from nozzle to liquid level) × acceleration of gravity × correction factor (1.1). The calculation is relatively simple, but in practice 「 Desulfurization and oxidation 」 There are three problems in the process of fan selection
4、 Pressure and resistance
「 Roots blower for desulfurization and oxidation 」 The pressure must overcome the liquid resistance in the tower. stay 「 Desulfurization and oxidation 」 In the pressure selection, the pressure must overcome the liquid resistance, but still need to ensure a certain margin. Generally, the value is 1.1-1.2 of the design coefficient. The final adoption should be determined according to the actual situation and production experience.
In the process of meeting the previous points, it is necessary to ensure that 「 Desulfurization and oxidation 」 The pressure should not be too high. If the pressure is too high in the process of pressure selection, the liquid in the tower will bubble or even overflow. Moreover, too high pressure will increase the cost of equipment selection.
You can design and select the right model according to your own system. If you have no experience, you need to find a professional designer to design and select the model. Blind purchase will not only increase your own cost, but also mislead the whole system and seriously affect the production.
「 How to select the type of Roots blower in desulfurization and oxidation http://theoxfordjazz.com/xw/125.html
More related recommendations