RU84088U1 - STEAM GENERATOR WITH LEAD COOLANT OR ITS ALLOYS - Google Patents

Abstract

A steam generator with a lead coolant or its alloys, comprising a housing with a lid, with coolant inlet and outlet pipes, a water supply pipe extending along the axis of the housing and connected to a distribution chamber, in the wall of which there are water outlet openings, and a steam discharge pipe, characterized in that around the water supply pipe there is an annular pressure chamber with a coolant supply pipe, in the lower wall of which holes are made for forming coolant jets, a distribution chamber with holes eniya water is located above the coolant level in the housing, and water holes expiration axis directed perpendicularly to the axis of the holes for forming the coolant jets.

Description

Fields of application of the proposed technical solution are nuclear and thermal energy, chemical and petrochemical industries.

Known steam generator according to the patent for a utility model of the Russian Federation No. 72302, F22B 1/02 publ. 2008.10.04. The steam generator with lead coolant or its alloys contains a housing with a lid, with pipes for supplying and discharging the coolant, pipes for supplying water and steam, in which the upper part of the housing, located above the pipe of the coolant and near the free level, is in communication with an overflow chamber, in which a mechanical filter is installed, in communication with the coolant supply pipe. Disadvantages (established experimentally) are the pulsations of the flow rate and temperature of the water and steam leaving the outflow opening, and the formation of deposits of water impurities on the walls of the outflow channels, up to the overlapping passing sections of the channels, due to local wall boiling of water in the channels.

Known steam generator according to the patent for a utility model of the Russian Federation No. 72303, F22D 5/28 publ. 2008.10.04. - prototype. The inventive steam generator with a lead coolant or its alloys, comprising a housing with a lid, with pipes for supplying and discharging a coolant, pipes for supplying water and steam, in which a pipe for supplying water is connected to a distribution chamber located below the level of the coolant, in the wall of which there are outflow openings water, above which perforated plates are installed in the coolant volume. Water outlets in the wall of the distribution chamber are made in the form of formed cracks, each of which is oriented in the horizontal plane; at the base of the dispensing chamber, a hole is made with a slide valve having a displacement drive, and the input part of the steam outlet pipe is closed by a chipper with a channel for the passage of steam and an opening for showering the coolant.

Disadvantages (established experimentally) - pulsations of the flow rate and temperature of water, steam leaving the outflow openings and the formation of deposits of water impurities on the walls of the outflow channels up to the overlap

passage sections of the channels (due to local wall boiling of water in the channels), which reduces the service life.

The tasks solved by the invention are improving the design of the steam generator, increasing the resource of its work.

The technical result is the elimination of temperature pulsations and, accordingly, pulsations of thermal stresses, the elimination of the formation of deposits of impurities in the water in the channels of the outlet holes and their clogging by deposits.

The technical result is achieved by the fact that in a steam generator with a lead coolant or its alloys containing a housing with a lid, with pipes for supplying and discharging a coolant, a pipe for supplying water passing along the axis of the steam generator, connected to a distribution chamber, in the wall of which there are water outlet openings, and an outlet pipe for steam passing through the central part of the lid is provided with an annular pressure chamber with a coolant supply pipe, in the bottom wall of which round or slotted holes are made for molds tion coolant jets distributes chamber with water outflow openings is located above the coolant level in the housing, and water holes expiration axis directed perpendicularly to the axis of the holes for forming the coolant jets.

The implementation of the steam generator according to this scheme provides direct contact of the surface of the incident jets and the perturbed free surface of the coolant with water droplets and with the steam generated by this contact. As experiments have shown, the heat transfer is intensified, the value of steam overheating increases, compared with the supply of water below the level - into the coolant volume, the pulsations of the flow rate and temperature of the generated steam are excluded, the formation of deposits of salts contained in the water in the channels of the water outflow holes is eliminated clogging of channels.

In FIG. The implementation scheme of the proposed technical solution is presented.

The housing 1 is closed by a cover 2, through which a pipe 3 of a water supply passes, connected to a distribution chamber 4, in the wall of which holes 5 for water outflow are made. Around the pipe 3 for supplying water passing through the central part of the cover 2 (along the axis of the steam generator), an annular pressure chamber 6 with a pipe 7 for supplying coolant is placed. In the bottom wall (bottom) of the pressure chamber 6, round openings 8 are made for forming the falling jets 9 of the coolant. In the housing 1 are located the pipe 10 of the coolant and the pipe 11 of the outlet of the generated steam. Distribution chamber 4 is located in the gas-vapor volume above

free level of the coolant 12, and the axis of the holes 5 of the outflow of water are directed perpendicular to the axis of the holes for the formation of falling jets.

The operation of the device is as follows. Through the pipe 7, the coolant enters the annular pressure chamber 6 with holes 8 and then in the form of falling jets it enters the free level of the coolant 12 and is discharged from the housing 1 through the pipe 10. Through the water supply pipe 3, water enters the device with the distribution chamber 4 and through the holes 5 is directed to the surface of the falling jets 9 of the coolant. As a result of surface direct contact heat transfer, the molten liquid metal with water and water vapor evaporates, and the steam overheats and is discharged from the steam generator through the pipe 11.

The application of the proposed technical solution will increase the resource of the water distribution chamber and the steam generator as a whole, eliminate the formation of deposits of salts and other impurities contained in the water on the walls of the outflow channels, and prevent clogging of these channels by deposits.

Claims (1)

A steam generator with a lead coolant or its alloys, comprising a housing with a lid, with coolant inlet and outlet pipes, a water supply pipe extending along the axis of the housing and connected to a distribution chamber, in the wall of which there are water outlet openings, and a steam discharge pipe, characterized in that around the water supply pipe there is an annular pressure chamber with a coolant supply pipe, in the lower wall of which there are openings for forming coolant jets, a distribution chamber with openings eniya water is located above the coolant level in the housing, and water holes expiration axis directed perpendicularly to the axis of the holes for forming the coolant jets.