SU1275186A1 - Steam cooler - Google Patents

Abstract

The invention relates to electrical engineering and m. used in thermal and nuclear power plants. The invention makes it possible to increase reliability by eliminating film currents. Part of the main flow (OD) of the steam is bypassed into the annular gap 3. From the latter, the steam enters the mixing chamber (K) 5 through slots of the screen (E) 4, over which goats are inclined. Water in K 5 is injected by nozzles 6, driven in an E 4 with a slope, in the direction of the OP. After expiration of the slots in the opposite direction of the OP, the steam tears off the water film that has appeared on the walls of the E 4 and throws it to the K 5 axis. A constant supply of fresh steam to Cori 3 helps to eliminate the water film on the walls of the steam line (L 1. 2 ill.

Description

The invention relates to power engineering and is intended for cooling and reducing steam of working processes, mainly in thermal and nuclear power plants, as well as in the petrochemical and gas industries.

The purpose of the invention is to increase reliability by eliminating film flows.

with peaks 9 enters the mixing chamber 5 towards the main steam stream., intensifying the process of heat and mass transfer.

Due to the constant supply of fresh steam into the annular gap, the temperature regime of the walls of the steam pipe 1 improves and the phenomena of thermal shocks and the presence of a water film on the wall of the steam pipe 1 are excluded. The crown of FIG. 1 shows a desuperheater, a longitudinal section; in FIG. 2 perforated screen.

The desuperheater comprises a steam line 1 with an inlet pipe 2 and 15 installed in the steam pipe 1 with the formation of a closed annular gap 3, a perforated screen 4 framing the mixing chamber 5 provided with nozzles 6, said ring annulus 3 being connected to the inlet pipe 2 of the steam pipe 1, and at the inlet to the mixing chamber 5, a throttle is installed 7. Nozzles 6 are introduced into the cavity of the mixing chamber 5 25 through a perforated screen 4 with an inclination in the direction of flow, and the perforation of the screen 4 is made in the form of slots 8 with visors 9, directed at an angle to the side opposite to the inclination of the nozzles 6.

Desuperheater works as follows.

The main steam stream is throttled in the throttle 7 and sent to the mixing chamber 5, into which cooling water is injected using nozzles 6. The cooled reduced steam is supplied to the consumer (not shown). A part of the main steam from the inlet pipe 2 of the steam pipe 1 enters, bypassing the throttle 7, into the annular gap 3 and then through the slots, the stream of fresh steam passing through the slots 8 breaks off the water film formed on the walls of the screen 4 and discards it to the axis of the mixing chamber 5. The direction of the visors 9 towards the main stream is selected in order to ensure aerodynamic crushing of the disrupted water film.

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Claims (1)

The invention relates to energy engineering and is intended for cooling and reducing steam of working processes, mainly in thermal and nuclear power plants as well as in the petrochemical and gas industry; The purpose of the invention is to improve reliability by eliminating current flows. FIG. 1 shows a desuperheater, longitudinal section} in FIG. 2 perforated screen. The desuperheater contains a steam-oil duct 1 with an inlet pipe 2 and installed in the steam line 1 to form a closed annular gap 3 a perforated screen 4 framing the mixing chamber 5 equipped with nozzles 6, and the specified annular gap 3 is communicated by the inlet pipe 2 of the steam pipe 1, and at the inlet the mixing chamber 5 has a throttle 7. The nozzles 6 are led into the cavity of the mixing chamber 5 through a perforated screen 4 with an inclining direction of flow, and the perforation of the screen 4 is made in the form of slots 8 with peaks 9, on systematic way at an angle in the direction opposite to the slope of the injectors 6. Desuperheater operates as follows. The main steam flow is choked in the choke 7 and sent to the mixing chamber 5, into which cooling water is injected through the nozzles 6. The cooled, reduced steam flows to the consumer (not shown). Part of the main steam from the inlet pipe 2 of the steam line 1 enters the mine throttle 7 into the annular gap 3 and then through the slots 62 8 with peaks 9 enters the mixing chamber 5 towards the main steam flow, to intensify the process of heat and mass transfer. Due to the constant flow of fresh steam into the annular gap 3, the temperature of the walls of the steam pipe 1 is improved, and the occurrence of thermal shock and the presence of a water film on the wall of the steam pipe 1 are eliminated. In addition, the flow of fresh steam, passing through the slots 8, disrupts the water film and discards it to the axis of the mixing chamber 5. The direction of the peaks 9 towards the main flow was chosen in order to provide aerodynamic crushing of the water film that is being torn off. Formula from the acquisition of the Desuperheater containing a steam line with an inlet pipe and a perforated screen mounted in the steam line to form a closed annular gap flanking the mixing chamber equipped with nozzles, the annular gap communicating with the inlet pipe of the steam line, and at the inlet to the mixing chamber a choke is installed This is characterized by the fact that, in order to increase its reliability by eliminating film flows, the nozzles are inserted into the cavity of the mixing chamber through a perforated screen with with a slide, passing the direction of flow, and the perforation of the screen is made in the form of slots with peaks directed at an angle in the direction opposite to the inclination of the nozzles.