JPS5824368A - Cyclone - Google Patents

Abstract

PURPOSE:To prevent the lowering of the collection efficiency of a cyclone, by arranging a discharge gas flow direction switching device having an opening part in the lower end of a discharge duct. CONSTITUTION:An upward flow gas discharge duct 4 is arranged on the upper wall of a cylinder part 1 of a cyclone. A discharge gas flow direction switching device 5 is connected to the lower end of the duct 4. The gas flow flowed from a horizontal flow gas charge duct 2 is guided between a guide 3 and the device 5 and reaches the cylinder part 1 and rises after separating powder and particles by high-speed rotation and reaches the gas flow direction switching device 5. It is flowed from the lower end into the gas discharge duct 4 and rises in a high speed and is discharged. An opening part of the device 5 is so set that the gas flow where a powder flow is not mixed is charged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cyclone used for separating solid particles in a gas.

Recently, many new inventions and research papers on dust collection cyclones have been published, but the upward flow gas extraction dust installed at the top of the cyclone is made into a straight cylindrical pipe that protrudes perpendicularly to the cylindrical part of the cyclone. It is common that the

In this case, the exhaust pipe guides the gas flow that has flowed in from the introduction dart to the upper cylindrical part on its outer periphery, and also separates the powder particles in the cylindrical part.The exhaust pipe then sucks up the gas flow from the lower end opening and directs it upward. It acts to expel. Therefore, in order to reduce the pressure drop of the gas flow, there have been proposals such as enlarging the diameter of the exhaust pipe or making the center eccentric with respect to the cylindrical part, but both have the disadvantage of reducing the dust collection efficiency of the cyclone.The present invention does not have such disadvantages. This invention has been made to solve the problem, and has the features described in the second claim above.

Next, the features and effects will be explained with reference to the drawings. Figures 1 and 2 show a dust collecting cyclone embodying the present invention, in which an upward flow gas deriving duct 4 is installed on the wall above the cylindrical part 1 of the cyclone, and is connected to the lower end of the duct 4 to be led out. A waste flow direction changing device 5 is provided. The gas flow flowing in from the water flow gas introduction duct 2 is guided between the guide 3 and the outer periphery of the device 5 as shown by arrow A, reaches the cylindrical part 1, separates the powder particles by high-speed rotation, and then moves as shown by arrow B. As shown, the gas rotates and rises until it reaches the gas flow direction changing device 5, continues to rotate nine times, flows into the device 5, is turned into an upward flow by the guide vane A, and flows into the gas outlet duct 4 from the lower end. It rises rapidly and is derived. In this case, the guide vane 6 may be disposed in the device 5, but may also be disposed at the lower end of the outlet duct 4.

Also, since the gas flow inside the outlet duct 4 hardly swirls, the cross-sectional area is smaller than the area of the opening of the device 5.
l:<+ The opening of the device 5 may face downward as shown, but it may also face sideways.

Once again in history. It may be directed both downwardly and laterally, in short, guide vanes may be used for the introduction as long as the opening is set so as to introduce a gas flow free of particles into the device 5.

Therefore, if the dust collection efficiency of the cyclone is increased and the gas flow is guided to the gas outlet duct 4 by the guide vane 6, the pressure loss can be reduced and the diameter of the outlet duct 4 can be reduced.

[Brief explanation of drawings]

1 and 2 show longitudinal and horizontal sections of an embodiment of the invention. 1... Cylindrical part of the cyclone, 2... Gas introduction duct 1
3... Gas inflow guide, 4... Gas outlet duct. 5... Gas flow direction changing device, 6... Guide vane. 7...Separated powder outlet. Figure 1

Claims (2)

[Claims] (1) A horizontal flow gas introduction duct and an upward flow gas discharge duct were provided at the top of the cylindrical part. A cyclone characterized in that the cyclone is provided with a discharge gas flow direction changing device connected to the lower end of the discharge duct and having an opening with a larger area. (2) The cyclone according to claim 1, wherein the opening of the gas flow direction changing device is configured to take in the gas flow from both the bottom and the sides.