RU2397803C1 - Water-steam ejecting nozzle - Google Patents

Abstract

FIELD: mechanics.

SUBSTANCE: invention relates to devices for decontamination of a contaminated gas flow with the help of a nozzle spraying a steam-and-water mixture and may be used at enterprises whose operation is connected with atmospheric air pollution. The nozzle is designed as a T-joint with nipples for delivery if steam and water and the steam-and-water mixture discharge. The mixing chamber is designed as a tube section screwed onto the nipple for the steam-and-water mixture discharge. The nozzle is equipped with an ejecting cone whose aperture angle is equal to 50°-70°. Mounted on the water and steam delivery tubes are valves regulating steam and water flow rates.

EFFECT: enhanced ejective performance of the water-steam plume and improved efficiency of contaminated flow decontamination.

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Description

The invention relates to a device for cleaning air streams from various kinds of harmful impurities and can be used in enterprises whose work is associated with air pollution.

Known steam-water sprinkler F-2, spray design Irgirezmet (Means of dust control in coal mines. Directory, Moscow, 1970, p. 78, Fig. 61; p. 82, Fig. 64).

Known fogger T3-1, TU-6 (Equipment and devices for complex dedusting of coal mines, opencasts and concentration plants. Catalog, Moscow, 1979, p. 98, fig. 102, p. 99, fig. 104, p .108, fig. 115).

The closest in design to the proposed nozzle device is an ejector mixer ES-4 (Equipment and devices for the complex dedusting of coal mines and open pits and concentration plants. Catalog. Moscow, 1979, p. 108, Fig. 115), consisting of fittings leading water and compressed air, the chamber mixing the flow of water and compressed air and the outlet pipe of the mixed stream.

However, this mixer does not provide a high degree of purification of the contaminated gas stream due to the lack of regulation of the ejection potential of the steam-water torch of the nozzle.

The objective of the invention is to provide a nozzle that provides a high degree of purification of the contaminated gas stream by controlling the mass and rate of discharge of the steam-water mixture at the outlet of the nozzle, providing the required level of ejection of the steam-water torch and its high turbulence in the gas washing zone.

This problem is solved in that in the nozzle, which consists of a body made in the form of a tee with nozzles for supplying steam and water, a branch pipe for discharging a steam-water mixture and a mixing chamber, the mixing chamber is made in the form of a pipe section screwed onto a pipe for discharging a steam-water mixture and is equipped with an ejector a cone with an opening angle of 50 ° -70 °, screwed onto the mixing chamber by means of a special nut. A holder tube is screwed into the steam inlet, through which a pipe with a control valve is passed through, through which a pair is supplied to the mixing chamber. Moreover, this pipe is located coaxially with the mixing chamber and the ejecting cone.

The pipe for supplying water is equipped with a plug screwed into it with a segment cut and connected to the water supply pipe by a threaded connection through a sleeve. The supply pipe has an adjustment valve.

The essence of the invention lies in the fact that the presence of an ejection cone, its alignment coaxially with the mixing chamber and the steam supply pipe allows the top of the cone to be inserted into or out of the mixing chamber by means of a nut, thereby changing the width of the annular area of the steam-water mixture discharge, which ensures the ability to control the magnitude of the ejection potential of the nozzle.

The installation of control valves on the steam supply pipe and the water supply pipe is necessary to control the pressure and the amount of water and steam supplied. This provides an increase in the ejection ability of the torch and, consequently, the degree of purification of the gas stream.

A plug with a segmented cut on the water supply pipe provides a swirl of the water flow. The opening angle of the ejection cone depends on the shape and geometric dimensions of the gas pipeline (chimney) and is 50 ° -70 °.

The invention is illustrated in the drawing, which shows a General view of the nozzle steam-water ejecting in section. The nozzle is made in the form of a water-gas tee with a pipe 1 for supplying steam and a pipe 2 for supplying water. A screw holder 3 is screwed into the pipe 1 for supplying steam, through which a steam pipe 4 passes, rigidly connected to the holder pipe 3 and equipped with a control valve 5. A pipe 6 with a segmented cut 7 is screwed into the pipe 2 for water supply, which swirls the water flow fed to the nozzle. The water supply pipe 8 is connected to the pipe 2 by means of a connecting sleeve 9 by a threaded connection. An adjustment valve 10 is also installed on the water supply pipe 8. The housing of the mixing chamber 12, made in the form of a pipe segment having an external thread, onto which a special nut 13 is screwed, is rigidly connected to the ejector cone 14 by means of slats fastenings 15. The ejection cone 14 has an opening angle α = 50 ° -70 ° and is mounted coaxially with the steam supply pipe 4 and the mixing chamber 12.

The nozzle works as follows. Steam is supplied into the nozzle through a pipe 4, the feed rate of which is regulated by valve 5. Water is supplied through a pipe 8 through a segment cut 7 of the plug 6. The flow rate and rate of water supply are regulated by valve 10. Water enters the space between the inner surface of the nozzle and the outer surface of the pipe 4 and swirling moves into the mixing chamber 12, where it is picked up at a high speed by a stream of steam, and the resulting steam-water mixture in swirling form is ejected through the annular discharge 16 onto the ejector cone 14, forming two s rapidly moving surface tapered hollow rotating torch 17 having a great ejecting force which engages by its surface and the surrounding gas, making turbulent intensively washed and quickly entrains it in its movement inside the pipeline (flue).

Thus, the proposed design of the steam-water ejecting nozzle allows to increase the degree of purification of the contaminated gas stream from highly dispersed solid aerosols and harmful gases.

Based on the patent information search and laboratory tests, we believe that the proposed nozzle meets the criteria of novelty, inventive step and industrial applicability and can be protected by a patent of the Russian Federation.

Claims (1)

Ejecting steam-water nozzle, consisting of a body in the form of a tee with nozzles for supplying steam and water, a chamber for mixing them and a pipe for removing the steam-water mixture, characterized in that the mixing chamber, made in the form of a pipe piece screwed onto the pipe for removing the steam-water mixture, is equipped an ejection cone with an opening angle of 50-70 ° screwed on with a special nut, while the ejection cone, the mixing chamber and the steam supply pipe are aligned, and the tube-holder is screwed into the steam supply pipe the atelier of the steam supply pipe and equipped with a control valve, and the water supply pipe has a screw plug with a segment cut and is connected by a threaded connection to the water supply pipe with a control valve.

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