SU965523A1 - Straight current cyclone - Google Patents

Description

(54) DIRECT-FLOW CYCLONE,

one

The invention relates to a technique for cleaning dust from gases and can be used in the metallurgical, chemical and other industries of the industry for dust removal of flue gases.

A cyclone for cleaning gas from dust is known, comprising a housing with a tangential nozzle, a fairing and an exhaust pipe passing through hopper 1 and 2.

The disadvantage of this cyclone is not high efficiency without additional suction of gas from the hopper, or high flow resistance.

Also known is a continuous cyclone for cleaning gas from dust, comprising a housing with a tangential inlet on the side wall under the housing cover and with an axial hole for dusting into the hopper in the lower housing, a fairing located along the axis of the housing under the flap, and an exhaust pipe, passing through the dust outlet 3.

The high hydraulic resistance of the known direct cyclone makes it unacceptable to use it as a gas pre-cleaner.

The aim of the invention is to reduce the hydraulic resistance.

This goal is achieved by the fact that a direct cyclone for cleaning gas from dust, comprising a housing with a tangential inlet on the tank wall under the housing cover and with an axial opening for dusting into the hopper in the lower part of the housing, a fairing located along the housing axis under the cover, and exhaust pipe

The Q passing through the dust outlet is provided with additional tangential inlet nozzles attached to the side wall and to the lid, the tangential nozzles being horizontal on the side wall and

15 cover - obliquely.

The cross-sectional area of the pipes located on the side wall is 2-2.2 times larger than the cross-sectional area of the pipes located on the cover.

2Q Nozzles, attached to the cap, have a circular cross section and are arranged in two symmetrical groups of three nozzles in each, their angle of inclination is. 45-60 °, and the diameter is equal to the distance between the cyclone wall and the fairing.

The distance from the cap to the exhaust pipe is determined by the formula

h 0.44-fc- (R + g) tga, where h is the distance from the lid to the exhaust pipe; R is the inner radius of the cyclone; g is the outer radius of the fairing; about - the angle of the nozzles. FIG. 1 shows a continuous cyclone; in fig. 2 - the same, top view.

A continuous cyclone consists of a housing 1 with tangential inlets 2, connected horizontally to the side wall of the housing, with tangential inlets 3 attached with a slope to the cover of housing 4 and with an axial bore to release dust 5 into the hopper 6, fairing 7, exhaust pipe

8 and the bounding cylinder 9 on the holder 10.

The principle of operation of the cyclone is as follows. The dusty gas flows through the inlet nozzles 3, tangentially connected with a slope to the lid of the housing 4, and through the inlet pipes 2, which are introduced tangentially without any slope to the side wall. Dust along the walls of the housing 1 enters the hopper 6 and is removed. The cleaned gas through the flap 7 enters the exhaust pipe 8, which is aligned strictly along the axis of the cyclone with the help of a limiting cylinder

9 and holder 10.

To improve the swirling flow, the nozzles 3 are located in two symmetric groups of three nozzles in each, the nozzles 2 are also arranged symmetrically, and their living area is 2-2.2 times larger than the living area of the nozzles, tangentially tilted to the lid four.

Of these cyclones, a battery dust collector can be composed, the use of which as a pretreatment apparatus in front of the main dust removal units, compared with the prototype, reduces the hydraulic resistance by 7–9 times with a cleaning degree of 97-98%.

Claims (4)

1. A continuous cyclone for cleaning gas from dust, comprising a housing with a tangential inlet nozzle on the side wall under the housing cover and with an axial opening for dusting into the bunker in the lower part of the housing, a fairing located along the housing axis under the cover, and the exhaust pipe, passing through a dust outlet, characterized in that, in order to reduce the hydraulic resistance, it is provided with additional tangential inlet nozzles that are connected to the side wall and to the lid, with the tangential nozzle and located on the side wall horizontally, and on the lid - obliquely. 2. Cyclone according to claim 1, characterized in that the cross-sectional area of the pipes located on the side wall is 2-2.2 times larger than the cross-sectional area of the pipes located on the cover. 3. Cyclone on PP. 1 and 2, characterized in that the nozzles attached to the lid have a circular cross section and are arranged in two symmetric groups of three nozzles in each, their angle of inclination is 45-60 °, and the diameter is equal to the distance between the cyclone wall and the fairing. 4. Cyclone on PP. 1-3, characterized in that the distance from the cap to the exhaust pipe is determined by the formula h 0.44.It (R + g) tga, where h is the distance from the cap to the exhaust pipe; R is the inner radius of the cyclone; G is the outer radius of the fairing; about - the angle of the nozzles. Sources of information taken into account in the examination 1. Handbook of dust and ash collection. Ed. A. A. Rusanov. M., “Energie, 1975, p. 296. 2.R. Jackson Uniflow cyclones. The British Coal Utilization Research Association. Monthly bulletin. Vol XXYII, No. 8, August, 1963. 3 .. Novikov L.M. et al. Comparative tests of a continuous cyclone and a cyclone NIIOGAZ of the type TsN-15 --- “Chemical Industry, 1980, No. 1.