RU2115484C1 - Cyclone - Google Patents

Abstract

FIELD: cleaning gas discharged into atmosphere and reconditioning powdered dye that has failed to deposit on part. SUBSTANCE: cyclone has casing with perforated bottom part placed in bin, inlet pipe connection, discharging hole, and exhaust pipe. In addition, cyclone is provided with one more bin having perforated bottom part and placed inside main bin which is provided with additional wall. Wall-to-wall space communicates through filter placed in annular chamber with discharge system and is separated from filter with perforated baffle plate. EFFECT: improved efficiency of entrapping powder due to its reduced carry-over. 2 cl, 1 dwg

Description

 The invention relates to dust collecting devices and is intended for the purification of gas released into the atmosphere and the recovery of powder paint that has not settled on the product.

 Known cyclone (Uzhov V.N., Waldberg A.Yu., Myagkov B.M., Reshidov I.K., Cleaning industrial gases from dust: M .: Chemistry, 1981, p. 87, Fig. 2.13b), comprising a housing, an inlet, a discharge port, a hopper, and an exhaust pipe.

 The disadvantage of the cyclone is the significant entrainment of the powder from the hopper by an internal spiral flow into the exhaust pipe.

 The closest to the proposed technical essence and the achieved result is a cyclone (ed. St. USSR N 1673220, 5 MKI B 04 C 5/14, 1991), containing a housing with a perforated lower part located in the hopper, inlet pipe, discharge port, an exhaust pipe and a fairing installed in the discharge opening coaxially with it.

 The disadvantage of the cyclone is that part of the powder is picked up by an internal spiral flow at the discharge opening. During the recovery of the powder, a significant amount of air enters the cyclone hopper (both prototype and analog), which swells the powder, while the entrainment of the powder from the hopper increases.

 The aim of the invention is to increase the efficiency of powder capture by reducing its entrainment from the hopper by an internal spiral flow.

 This goal is achieved in that the cyclone, comprising a housing with a perforated lower part located in the hopper, an inlet pipe, an unloading hole and an exhaust pipe, is equipped with an additional hopper with a perforated lower part located inside the main one, while the main hopper is equipped with an additional wall, and the interwall the space is connected through the filter to the suction system, and the inter-wall space is separated from the filter by a divider.

 In a cyclone made in this way, air accumulation is excluded both in the main and in additional bins, which would lead to swelling of the recovered powder, while ensuring an efficient extraction of the recovered powder and its quiet inertial deposition to the intake nozzles of the ejectors in the lower part of the bins. As a result, the ablation of the powder from the hopper decreases sharply by an internal spiral flow, and the overall efficiency of powder capture by the cyclone increases.

 The drawing shows a General view of the cyclone.

 The cyclone contains a housing 1 with a perforated lower part 2 located in the hopper 3, an inlet pipe 4, an unloading hole 5 and an exhaust pipe 6. An additional hopper 7 with a perforated lower part 8 is placed inside the main hopper 3 and connected at the top to the cyclone body, and at the bottom with an intake pipe of the ejector 9. The main hopper 3 is provided with an additional wall 10, is connected to the interwall space through a filter 11 with a system suction 12. The filter 11 is made of fabric fixed on a concave frame and is placed in an annular chamber 13 The interwall space is separate from the filter 11 by a divider 14 made in the form of a cylindrical perforated partition. The additional wall 10 of the main hopper 3 is connected to the intake pipe of the ejector 15.

 The cyclone works as follows.

 The suction system from the cyclone (not shown) connected to the exhaust pipe 6 and the suction system 12 from the hoppers 3 and 7 are turned on. Powder-air flow enters through the nozzle 4 into the cyclone body 1. In the cylindrical part of the cyclone body 1, the powder-air flow moves in a spiral at a speed that increases from the periphery to the center, while under the action of centrifugal forces, the particles of powder paint are carried out from the stream to the wall. Part of the powder enters through the openings of the lower part 2 of the cyclone into the main hopper 3 or through the discharge opening 5 into the additional hopper 7, and from it through the openings in the lower part 8 into the hopper 3 or ejector 9. The powder is taken from the hopper 3 by the ejector 15. Swirling air the stream with the remaining powder rises from the discharge opening 5 and is discharged into the exhaust pipe 6. The air from the bins 3 and 7 is removed by the suction system 12 through the interwall space, the divider 14 — the perforated partition and the filter 11.

 Compared with the known, the proposed cyclone provides an increase in the efficiency of powder capture, since air is removed from the hoppers and the recovered powder does not swell, the powder is prevented from leaving the hopper into the cyclone through the central part of the discharge opening 5 and its entrainment by an internal spiral flow into the exhaust pipe 6.

Claims (2)

 1. A cyclone containing a housing with a perforated lower part located in the hopper, an inlet pipe, an unloading hole and an exhaust pipe, characterized in that it is provided with an additional hopper with a perforated lower part located inside the main one, the main hopper having an additional wall, and the interwall space is connected through a filter to the suction system.  2. The cyclone according to claim 1, characterized in that the interwall space is separated from the filter by a divider.