SU368448A1 - INTERMEDIATE SEPARATOR-PARAPO-HEATING - Google Patents

Description

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The invention relates to intermediate separation and steam heating devices and can be used for touring with working saturated or weakly superheated steam.

Ieves are intermediate separators-steam superheaters, which contain a circular louvered type moisture trap package and a cylindrical tubular bundle of heat exchanging tubs in the common case, equipped with inlet and outlet headers, with a movement of the trapping medium inside the pipes, and the superheated steam in the inter-tube space. In these separators-steam superheaters, the input and output headers of the heat exchange beam are located under the beam, and the beam is formed by long spiral coils connected to the collectors by vertical pipes, with the coils lying on a conical surface. The disadvantages of these separators are, firstly, the presence of vertical outside pipe sections cooled in which steam moves from the bottom of iBBepx, preventing the condensate film from flowing down; secondly, the need to weld long coils from relatively short seamless pipes supplied by pipe plants. This predetermines a lower reliability of the a-device, because the welded joints are always less reliable than

base metal, especially in the case of carbon and low alloy steel pipes. Third, the lack of the possibility of drainage of horizontal spiral

coils after stopping the separator and poor drainage during operation due to the absence of natural inclination of the pipes also reduces the reliability and durability of the separator superheater due to the accelerated corrosive wear of non-drained pipes.

The purpose of the invention is to increase the operational reliability of the intermediate separator-superheater, simplify the design and repair, as well as ensure the most efficient operation of the separation device and equal distribution of pipes in the heat exchange beam. For this, the collectors of the heat exchanger beam are located vertically one above the other on the same axis and have a diameter sufficient for free access from the inside of the collector to the places of the seals of the pipes, and the pipes are inclined along the entire length to the horizontal and disposed around the collectors

concentric rows. In addition, the moisture trapping bag is installed in the housing eccentric with a shift in the direction of movement of the overheated steam notok and has at least a water trap

package perforated sheet. The number of tubes in each of the concentric rows of the beam, made up of flat 1-shaped tubes, is a multiple of six, which ensures an almost uniform filling of tubes with a transverse cross section of the heat exchanger beam.

FIG. 1 depicts a separator-heated reheater with a single-stage steam superheat, longitudinal section; in fig. 2 is a section along the AL in FIG. one; in fig. 3 - another version of the separator, a longitudinal section; in fig. 4 - a section then bb and figs. 3; in fig. 5 is a diagram of a heat exchange bundle consisting of flat l-shaped pipes; on fig. 6 is a diagram of a heat exchange bundle in which the upper and lower headers are combined, B one common collector; in fig. 7 is a variant of a separator with a side outlet of superheated steam.

The separator-steam superheater (see Figs. 1 and 2) contains an annular moisture chamber, an L package 2, located eccentrically located in the lower part of the housing 3, and a heat exchanger beam 4, the lower part of which is in the free internal space of the moisture trap 1, and the upper part in the upper part of the housing 3. The upper part of the housing has a smaller diameter compared to the lower. Package / enclosed between the input 5 and output 6 perforated sheets.

The separator-superheater works as follows.

The wet steam entering the lower part of the casing 3 of the separator-superheater spreads over the annular channel between the casing and the water-vapor trap. This channel, due to the eccentric arrangement of the moisture trapping bag, has a gradually decreasing cross-sectional area, which ensures the constant velocity of the steam in this channel and allows a fairly uniform distribution of steam through louver 2 with minimal hydraulic resistance of the holey sheets. The wet steam passes the louver 2 in the radially1M direction, while the louver draining out the moisture is collected in the gutters 7 located under the louver packets, and from them down the hollow vertical chambers 8 through the hydraulic lock 9 flows into the receiver of the separated valee 10. Dried steam after the moisture trap is moved from top to bottom along the annular channel between the last and tploob.mennym beam 4 and, entering the beam 4 from the lower end, goes from bottom to top along the intertubal space. Superheated steam is discharged in the upper part of housing 3.

The heating steam enters the upper collector 11 of the heat exchanger beam 4, from it into the pipes, where it condenses, giving away its heat to the heated pair. Condensate heating steam flows from the pipe into the lower collector 12, in which a constant water level is maintained. From the lower collector through

pipe 13 is removed along with part of the vapor by non-condensable gases.

There is another version of the separator (see Figs. 3, 4), which has a cylindrical body 3 of the same diameter in height and in which the heat exchanger beam 4 is located above the dehumidifier bag 1. The heat exchange beam is made up of flat C-shaped tubes (see Fig. 5). Top and

the lower ends of the pipes are made p1adIal and embedded in the walls of the collectors // and 12, moreover, the lower radial section of the pipes has a slight inclination to the horizontal to ensure drainage. To simplify the construction, the upper 11 and lower 12 col., Heat transfer beam 4 vectors can be combined into one common collector with a transverse partition 14 in the middle (see Fig. 6). In a number of cases, especially in separators with a small heat load of each of the pipes, the separator can work effectively without a transverse partition, then the heating steam will flow into the pipes both through their upper and lower ends. If necessary, lateral removal of superheated steam, the heat exchange beam has transverse partitions 15 (see Fig. 7) and its pipes flow around the heated steam in a two-way: first, from the periphery to the center,

and then from the center to the periphery. Both the upper and lower collectors have open access hatches inside the collector for carrying out operations on the installation of tubes in the collector walls (rolling or welding,

or both) and for killing defective pipes.

Subject invention

Claims (5)

1. Intermediate separator-steam superheater for saturated or weakly superheated steam turbines, containing annular moisture-separating packages located in a common housing, for example, louvered mud and a cylindrical heat exchanger tube bundle provided with inlet and outlet headers, characterized in that, in order to improve operational reliability simplified construction and repair, collectors are installed vertically on the same axis, and the beam pipes are inclined to the horizon along the entire length. 2. A steam separator according to claim 1, characterized in that, in order to improve moisture trapping and reduce hydraulic loss, the moisture trap is installed eccentrically in the housing with a shift in the direction of flow of the superheated steam and at least in front of the water trap. perforated sheet. 3. The separator-superheater in PP. 1 and 2, characterized in that the bundle tubes are (3-shaped and arranged in concentric rows around the collectors, and the number of tubes in each row is a multiple of six. 4.Sparator-Paroper-heater according to paragraphs. - 3, characterized in that, in order to simplify the design, the input and output headers are combined into one common collector. 5. Separ-ator-heater on NS. one - 4, characterized in that, in order to allow lateral removal of superheated steam in the vertical arrangement of the apparatus, partitions are installed in the bundle, and free space is provided inside the bundle. u2 -.ff (Rygl