RU2499630C2 - Venturi tube-type gas cleaner - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cleaning gases of dust and chemical contaminants. Proposed device consists of confuser, neck, diffuser with retainer, adjustment nozzle composed of spaced apart coaxial elements and connected with drive via rod, sprinkling system composed of manifold with nozzles composed by case, union with diverging channel, cylindrical bore, shaped hole in the form of Laval nozzle, cylindrical swirler with outer helical riffled channels, central axial bore with screw grooves on inner surface directed opposite the direction of channel grooves.

EFFECT: increased power savings.

1 dwg

Description

The invention relates to techniques for cleaning gases from dust and chemical hazards and can find application, for example, in iron and steel enterprises.

Closest to the claimed object in technical essence and the achieved result is a gas purification device for gas purification such as a Venturi pipe from patent document RU 2338580 C1, B01D 47/10, publ. 11/20/2008, including a confuser, a neck, a diffuser, a regulating insert connected via a rod to the drive, an irrigation system in the form of a manifold with nozzles, a latch installed in the diffuser, and the regulating insert is made of elements coaxially installed at a distance from each other, while the outer element is rigidly fixed to the rod using knitting needles, and the inner element is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element (prototype).

A disadvantage of the known device is that with large quantities of purified gases, energy consumption for the control system increases due to the lack of devices for fine atomization of the liquid.

The technical result is a reduction in energy consumption for gas purification.

This is achieved by the fact that in a gas purification device such as a Venturi pipe, including a confuser, a neck, a diffuser, a regulating insert connected via a rod to the actuator, an irrigation system, a clamp installed in the diffuser, and the regulating insert is made of coaxially installed at a distance from other elements, while the outer element is rigidly fixed to the rod using spokes, and the inner one is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element, sys the topic of irrigation is made in the form of a manifold with nozzles, each nozzle containing a body, a nozzle and a swirl insert coaxially located with them, and an expanding channel for supplying liquid into a cylindrical hole, which is made axisymmetrically to the body and smoothly passes into the nozzle, is made coaxial with it, a figured hole made in the form of a Laval nozzle, and a cylindrical swirl insert having external peripheral screw-shaped threaded is installed in the cylindrical hole of the housing, axisymmetrically to it channels, and along the axis of the swirl insert, a central axial hole is made with a screw thread on the inner surface, the reverse direction of the channel cutting, while the swirl insert is installed in the housing through elastic gaskets and is pressed by the fitting by means of a threaded housing-fitting connection.

Figure 1 shows a longitudinal section of the proposed device; figure 2 is a section aa in figure 1, figure 3 is a diagram of the nozzle in the irrigation device.

A device for cleaning gases such as a Venturi pipe (Figs. 1 and 2) includes a confuser 1, a neck 2, a diffuser 3, a divider 4, through which water is supplied, a regulating insert 5, consisting of an outer element 6 and an inner element 7 having stops 8. The element 6 by means of spokes 9 is rigidly connected to the rod 10, which is moved by the actuator 11.

Contaminated gases entering the venturi, by the divider 4 are distributed along the annular gap between the cylindrical body 13 and the divider 4, which also receives irrigation fluid through the manifold 14 and nozzle 15 (figure 3).

The outer element 6 of the insert is installed with a gap with respect to the inner element 7 of the insert. Element 7 is installed with a gap on the rod 10 and has the ability to move. The stops 8 mounted on the element 7 are located between the spokes of the element 6. The height of the stops N is greater than or equal to the distance from the latch 12 installed in the diffuser 3 to the lower position of the outer insert element L, and L + b> H where b is the height of the outer element insertion.

Each of the nozzles (Fig. 3) consists of a housing 16 and an alignment 17 located coaxially with it in the upper part of the fitting 17, in which an expanding channel 18 is provided for supplying liquid to a cylindrical hole 19, made axisymmetrically to the housing 16. The cylindrical hole 19 smoothly passes into a coaxial figured hole 20 made in the form of a Laval nozzle. A cylindrical swirler insert 21 having external peripheral helical threaded channels 22 is mounted in the housing opening 19, axisymmetrically to it. A central axial hole 23 is made along the axis of the swirl insert 21 with a screw thread on the inner surface, the reverse direction of the cutting of channels 22. External screw-shaped thread channels 22 and screw cutting on the inner surface of the axial hole 23 can be performed with variable pitch. The swirl insert 21 is installed in the housing 16 through the elastic gaskets 24 and 25 and is pressed by the fitting 17 by means of a threaded connection between the housing and the fitting.

The operation of the device is as follows.

With the maximum amount of cleaned gases, the regulating insert 5 is in the upper position. In this case, the element 7 rests on the spokes 9, clinging to them due to the pressure of the gas to be cleaned and weight. To the middle position, the relative position of the inner element 7 and the outer element 6 remains unchanged. Then, with a decrease in the amount of gas to be cleaned, the outer element 6 moves down, and the inner 7 is fixed on the stops 8, thereby transferring the load from the gas pressure to them.

The pressure drop across the venturi pipe increases with decreasing flow rate, i.e. when the regulating insert moves down. Therefore, with the most significant pressure drop across the venturi, when the outer element 6 of the insert 5 is in the lower position and the inner element 7 is fixed, the load on the actuator 11 will be reduced.

The main amount of gas to be cleaned at maximum opening passes through the gap between the outer element 6 and the confuser 1. A certain amount, approximately 15% of the maximum, passes through the gap between the inner element ~ 7, both of which are cleaned by supplying water through divider 4.

When lowering the regulating insert to the lower position, the purified gas passes into the gap between the outer and inner parts. The gas passing through the gap creates aerodynamic protection against wear by the gas flow of the rod 10. Similar wear is observed on Venturi pipes of a similar design.

Thus, the advantages of the proposed device are to reduce energy consumption for gas purification and increase the wear resistance of internal nodes.

The nozzle for spraying liquid works as follows.

The fluid enters the housing 16 through the fluid supply channel 18 in the fitting 17, and then into the central cylindrical hole 19. The fluid begins to swirl in the peripheral channels of the swirl insert 21, and simultaneously in the internal channels of the central axial hole 23 with the opposite direction. Such a fluid flow at the outlet of the figured hole 20 in the form of a Laval nozzle is well disclosed due to centrifugal forces arising from the rotation of the liquid, and is finely dispersed inside the conical torch due to turbulent flow along the axis of the nozzle 20.

The nozzle is easy to manufacture and maintain.

Claims (1)

A device for cleaning gases such as a Venturi pipe, including a confuser, a neck, a diffuser, a regulating insert connected via a rod to the actuator, an irrigation system, a clamp installed in the diffuser, and the regulating insert is made of elements coaxially installed at a distance from each other, while the outer the element is rigidly fixed to the rod with the help of knitting needles, and the inner one is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element, the irrigation system is made in in the form of a manifold with nozzles, characterized in that each of the nozzles contains a housing, a nozzle and an insert swirl coaxially located with them, and an expanding channel is made in the nozzle for supplying fluid to a cylindrical hole, which is made axisymmetrically to the body and smoothly passes into a figured coaxial with it an opening made in the form of a Laval nozzle, and a cylindrical swirl insert having external peripheral helical threaded channels is installed in the cylindrical hole of the housing, axisymmetrically to it, insertion of the swirl-axis has a central axial bore with a screw thread on the inner surface of the back channels cutting direction, wherein the insert-swirler installed in the housing and through a resilient gasket is urged by a threaded fitting body connections - fitting.

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