SU1038704A1 - Device for humidifying steam - Google Patents

Abstract

1. A DEVICE FOR MOISTURIZING STEAM, containing a mixing chamber installed in a pipeline with an annular cavity formed in the form of a Venturi tube with openings in its narrow part, confused and adjacent at the outlet to the inner top:. n Water S / g X Steam /. The pipeline has diffuser sections and water supply pipes in communication with the narrow part of the Venturi tube, characterized in that, in order to increase the efficiency of moistening and reduce erosive wear, the confuser section is located relative to the internal surface of the pipeline to form an annular gap, and the annular cavity communicates with by the narrow part of the Venturi tube, 2. The device according to claim 1, that is, so that narrowing nozzles are installed in the openings of the narrow part of the Venturi tube. 3. The device according to paragraphs. 1 and 2; This is due to the fact that the water supply pipes are located relative to the nozzles with (L clearance, and the annular cavity, with & price with the narrow part of the Venturi tube by means of the latter) 1x. oo 00 t S &

Description

The invention relates to heat power engineering, in particular, to devices for controlling the parameters of a heat carrier (temperature and humidity of steam).

A device for humidifying $ steam containing a venturi pipe with a supply of water in a narrow part [D

However, when water is sprayed in the steam stream, coarse moisture forms, WHAT leads to erosion wear of LO-10 turbine molasses.

A device for humidifying steam containing installed in the pipeline formation of a ^ annular cavity, a mixing chamber made in the form of a venturi with holes in its narrow part, confuser and adjacent to the outlet to the inner surface of the pipeline diffuser sections, and water supply pipes in communication with the narrow ₂₀ 0 part of the venturi pipe f2].

The disadvantages of the device are the low efficiency of humidification processes and increased erosion wear of the turbine blades due to the low efficiency of water crushing.

The purpose of the invention is to increase the efficiency of hydration and reduce erosion wear.

The specified del is achieved by the fact that _{n is} in the device. For humidifying the steam containing a mixing chamber installed in the pipeline with the formation of an annular cavity, made in the form of a venturi with holes in its narrow part, confused and adjacent at the outlet to the inner surface of the pipeline with diffuser sections, and water supply tubes communicated with the narrow part of the venturi, the confuser section is located relative to the inner surface of the pipeline with the formation of an annular gap, and the annular cavity is in communication with viscous part of the venturi tube. *

Narrowing nozzles are installed in the openings of the narrow part of the venturi. ⁴⁵

The water supply tubes are located relative to the nozzles with a gap, and the annular cavity is in communication with the narrow part of the venturi through the latter.

The drawing shows a device for ^{50 of the} surface of the pipeline 1 diffuser section 8, p. water supply tubes 9 in communication with the narrow part 6 of the venturi, the confuser section 7 is located relative to the inner surface of the pipe 1 with the formation of an annular gap .10, and the annular cavity 1 is in communication with the narrow part 6 of the venturi 4, in the holes 5 of the narrow part 6 of the venturi 4, the tapered nozzles 11 are installed, the water supply pipes 9 are located relative to the nozzles 11 with a gap 12, and the annular cavity 2 is in communication with the narrow part 6 of the venturi 4 through the latter.

The device operates as follows ·.

Steam, having passed the confuser section 7 of the Venturi pipe 4, acquires in its narrow part 6 a speed close to critical, necessary for efficient crushing of water. Part of the steam flow, passing through the annular gap 10 into the annular cavity 2, enters the nozzle 11 through the gap 12, where, after acceleration to a critical speed, the jets of water flowing into the nozzles from the water supply tubes 9 are crushed (1st crushing stage). The short length of the nozzles 11 does not allow a crushing process to be completed, as a result of which the vapor stream flowing from the nozzles 11 to the narrow part 6 of the venturi 4 contains a significant amount of coarse moisture. In the narrow part 6 of the Venturi 4, the main steam stream is the process of final crushing of large moisture (2nd stage of crushing), ending in the diffuser section 8 of the Venturi 4.

To ensure the required steam flow rate in the nozzles 11, the width of the annular gap 10 at the entrance to the annular cavity 2 should be 1.0-1.5% of the diameter of the narrow part of the venturi 4. The number and diameter of the nozzles 11 is selected from the condition that they reach a critical speed . The nozzle sections .11 are flush with the inner surface of the narrow part 6, which (in combination with a high flow rate) prevents the edge and suspended moisture from humidifying the steam.

The steam humidification device comprises a mixing chamber 3 installed in the pipeline 1 with the formation of an annular cavity 2, made in the form of a Venturi pipe 4 with holes 5 in its narrow part 6, a confuser section 7 and adjacent to it. entrance to the internal dose of nozzles in the wall of moisture.

The presence of two stages of crushing allows one to reduce the length of the narrow ^55th part of the Venturi pipe by a factor of 1.5–2, while the wetting efficiency is increased and erosion wear is reduced due to the absence of coarse moisture.

Claims (3)

1. DEVICE FOR MOISTURIZING STEAM, containing a mixing chamber installed in the pipeline with the formation of an annular cavity, made in the vice of the venturi with holes in its narrow part, confused and adjacent at the outlet to the inner surface Soda of the pipeline with diffuser sections, and water supply pipes communicated with the narrow part of the venturi pipe, characterized in that, in order to increase the efficiency of humidification and reduce erosion, the confuser section is located relative to the inner surface of the pipeline with the formation of an annular gap, and the annular cavity is in communication with narrow part of venturi pipe. 2. The device according to π. 1, with the fact that tapering nozzles are installed in the openings of the narrow part of the venturi. 3. The device according to paragraphs. 1 and 2,. This is due to the fact that the water supply tubes are located relative to the nozzles with a gap, and the annular cavity is in communication with the narrow part of the venturi through the latter. Roda> 1 1038704 2