Centrifugal Exhaust Fan Blower

Centrifugal Exhaust Fan Blower

This centrifugal exhaust fan blower we produce is an energy efficient product. It has the advantages of high efficiency, low noise, and high efficiency area with a wide range of performance curves. The fan is suitable for industrial boilers of 0.5~35t / h, equipped with coal-saving units (preheaters) and smoke and dust proof units. You can choose the fan you need based on the inlet conditions and performance, but the maximum inlet temperature should not exceed 250 °C.
Product description

Product introduction:

1. This centrifugal exhaust fan blower we produce is an energy efficient product. It has the advantages of high efficiency, low noise, and high efficiency area with a wide range of performance curves. The fan is suitable for industrial boilers of 0.5~35t / h, equipped with coal-saving units (preheaters) and smoke and dust proof units. You can choose the fan you need based on the inlet conditions and performance, but the maximum inlet temperature should not exceed 250 °C.

2. The dust removal equipment with a dust removal efficiency of not less than 85% must be installed at the front of the induced draft fan to reduce the flue gas content in the fan, reduce the dust wear of the fan, and improve the service life of the fan. There are currently many series of industrial boilers. There is a big difference between high and low grade coal. The resistance of the dust removing device and the coal saving device are not uniform. The flow and pressure of the induced draft fan vary widely. Considering the economics and applicability of the fan, we offer two fan series Y8-39 and Y9-38 for users to choose. Two series fans with the same model have the same connection and mounting dimensions.

Product features:

1. The centrifugal exhaust fan blower is manufactured by single suction. The fan can be composed of two types of rotation, namely left and right.

The outlet position of the fan is 0°, 45°, 90°, 135°, 180°, 225° from “right” and “left”. When the above fan number is rotated, the exit angle and the drive method do not meet your requirements, we have the ability to remodel or design it for you.

2. The series of centrifugal exhaust fan blower consists of an impeller, a casing, an air inlet, a damper and a driving device. After the impeller is molded, it undergoes strict static/dynamic balance calibration and overspeed running test, which is stable and reliable, and has a long service life. The outer casing is welded into a volute with ordinary steel plates and equipped with a clean dust door to remove dust from the blades and the outer casing to ensure the balance and aerodynamic performance of the impeller.

3. The drive unit consists of a main shaft and a bearing housing. The main shaft is made of super steel and uses rolling bearings. The bearing housing is available in one piece and in split type. The integral bearing housing is for No. 4~6.3 and the split bearing housing is for No.7.1~16. Both bearing housings require water cooling. According to the working temperature and ambient temperature, the water consumption is different, generally 0.5 m 3 / h~1 m 3 / h. There is a thermometer and oil level indicator on the bearing housing. 30# mechanical oil is used on the bearing housing. The amount of oil applied is based on the oil level mark.

4. The damper is petal adjusted and mounted axially at the front of the inlet. With an external drive structure, the rotation is simple and flexible. The adjustment range is from 90° (fully closed) to 0° (fully open). In order for each part of the damper to function properly, good lubrication is required. High temperature (260 ° C) bentonite grease is recommended to ensure that the fan will not fail when operating at high temperatures.

Performance and choice:

The performance parameters in the fan performance table are converted using the dimensionless performance table "Table 1" and "Table 2". The result of the conversion is correct, when Re ≥ 510 × 6, and when Re ≤ 510 × 6, each fan No performs relative correction. According to the test results. Its value is based on performance tables.

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1. The designer and user choose to induce a drought fan No. In the performance table, based on the required flow and total pressure. The specific performance and complete motor must be found in the table, but the power and speed should match and be noted at the time of purchase.

2. The performance of each speed in the performance table is divided into 7 performance points according to the performance of the flow rate with the maximum efficiency in the range of 90%. The performance table is used as a standard at the time of purchase.

3. The performance of the fan factory is that the total pressure under a given flow rate must not exceed ± 5%.

4. 4~4~6.3 in the performance table is calculated by the flue gas ambient temperature t = 220°C, 200°C, atmospheric pressure P = 101325Pa, air density ρ= 0.713, 0.745kg / m 3 , higher than No7.1 flue gas Calculate the gas ambient temperature t = 200 ° C, 175 ° C, atmospheric pressure P = 101325 Pa, air density ρ = 0.745, 0.784 kg / m 3 . The selection curve and performance table with damper fan indicate the parameters for the damper fully open (0 °C).

5. When the operating conditions are not standard, the performance is calculated by the following formula:

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6.The required power in the table of performance and optional part:

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7.There are the following relation ship among Q(flow rate), P(total pressure), N(power ) and n(speed)when the inlet condition is not changed.

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From the total pressure of item 5 and the formula of the power formula N required by item 6, it is warned that when the motor capacity has not changed, the fan is prohibited from running at cold and full speed or arbitrarily increasing the speed, otherwise there is a danger of motor burnout due to overload.

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3. Select a new fan with a higher pressure.

Supply range of fan unit:

An induced draft fan, a shock absorber, a drive motor, a pair of motor guides, and a set of anchor bolts.

Purchase information:

When purchasing, please specify the fan size, flow, pressure, discharge angle, direction of rotation and motor type, power and speed.

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