SU1456736A1 - Air-cooled condenser of vapour-gas mixture - Google Patents

Abstract

Invention m. used in refrigeration and chemical production. The purpose of the invention is to increase the efficiency of the condenser by improving the removal of non-condensing gases. The steam and gas mixture, through the steam supply line 3, is supplied to the upper collectors 2, passes inside the pipes of sections 1, where it is condensed by cooling the pipes with air from the ventgil torus 6. The condensate drains into the volume of the lower collectors 4 to the canopies and plates and then through pipes 7 it merges into condensate collector (CS) 8. To eliminate flows of the gas-vapor mixture between the collectors of 3 different sections through the COP 8, the lower ends of the nozzles 7 are lowered below the level of condensate. In order to improve the non-condensable gas removal efficiency, visors, vertical and inclined plates are installed in the lower collectors 4, forming a zone of increased gas concentration adjacent to the lower ends of the tubes of sections 1. The edge plate provides condensate drain on an inclined plane to the surroundings (L

Description

The invention relates to energy and can be used in refrigeration and chemical production, in particular in condensers with a closed vapor-liquid circulation cycle of a coolant during condensation of the vapor-gas mixture inside tube bundles cooled by air with an upper supply of the vapor-gas mixture to the co-sensor sections from which it is necessary Removal of non-condensable gases.

The purpose of the invention is to increase the efficiency of the air-cooled condenser by improving the removal of non-condensable gases.

FIG. 1 shows schematically the proposed air-cooled condenser; in fig. 2 - node I on

FIG. I.

The air-cooled condenser contains cooling pipe sections 1 with upper headers 2 connected to the steam supply line 3, and lower headers 4 with nozzles 5 for non-condensing gases. Pat- The cabins 5 are located on the lateral generator of the collectors 4 on the side of supplying air from the fan 6. In the lower part of the collectors 4 there are nozzles 7 for draining condensate to the condensate collector 8.

In the lower headers 4, peaks 9 are mounted, mounted on their lateral non-condensable gases forming above the branch pipes 5 for exhaust with inclination in the direction of air movement. In the collectors 4 there are vertical plates 10 with holes 11 in the upper and lower parts. Plate 10 attached top chrome

Oh to the visors 9 and form with them with the side forming the collectors of the chamber 12 of the non-condensable outlet of gases. In the collectors 4 there are also additional plates 13, set with an inclination in the direction of the direction of air movement and attached to the vertical plates 10 between the holes. The plates 13 are provided with edges 14, which are arranged with a gap relative to the opposite side formations of the collectors 4.

The condenser works as follows

way ..

The steam-gas mixture through the steam supply line 3 is supplied to the upper collectors 2, passes inside the pipes of the pipe sections 1, where it is condensed by cooling the pipes with air from the fan 6. The condensate flows into the volume of the lower collectors 4 to the canopies 9 and plates 13 and then through the pipes 7 drained into the condensate trap 8.

To eliminate the flow of gas-vapor mixture between the collectors of 4 different sections through the condensate collector 8, the lower ends of the pipes 7 are lowered below the level of condensate. When condensation of steam from the vapor-gas mixture inside the bundles of vertical seki pipes occurs, the concentration of non-condensable gas increases and when it leaves the pipes in the lower collectors 4 it reaches a maximum value. In the first rows of pipes (along the air flow), the steam enters not only from above, but also from below from the lower collectors 4 due to steam flows inside each section through the lower collector due to different cooling conditions of individual rows of pipes along the heated air. The presence of two opposite vapor streams in the first rows of pipes leads to an even greater increase in the concentrate of non-condensable gases and their locking.

In the course of operation, without removing non-condensing gases, their gradual accumulation occurs, an increase in the partial pressure of gases, which impairs heat transfer.

To increase the removal efficiency of non-condensable gases in the lower manifolds 4, peaks 9, vertical plates 10 and inclined plates 13 are installed, which form a zone of increased gas concentration adjacent to the lower ends of the tubes of sections 1. The plate 13 with the rim 14 provides condensate on an inclined plane to the generator collectors 4 on the side opposite to the direction of air movement. The water seal formed by the lip 14 limits the leakage of gases to the condensate collector 8. The condensed gases from the increased concentration zone flow through the upper holes 11 in the vertical plate 10 into the chamber 12 and are removed through the nozzle 5 to their cleaning system. The holes 11 in the bottom of the plate 10 provide for drainage condensate from chamber 12. The visor 9 prevents the holes 11 from falling into them of condensate flowing from the first rows of pipes.

The design of the proposed condenser allows the removal of non-condensable gases from both individual sections and from all sections of the condenser at the same time. Since the zone of increased gas concentrations in the volume of the lower collectors 4 is preserved only under the conditions of the condenser section connected to the work-

.five

ten

external cooling circuit eliminates the need to disconnect the section from the operating circuit when non-condensing gases are removed from it.

The capacitor allows you to increase the efficiency of using its surface, to increase the stability of its work.

Claims (1)

Invention Formula Air-cooled condenser of a vapor-gas mixture containing cooling pipe sections with upper headers connected to the steam supply line and lower headers with non-condensable gases branch pipes located on the lateral generatrix on the side of the air supply from the fan and connected to the non-condensable gases outlet lines condensate drainage from the lower part of the collectors and the condensate collector, characterized in that, in order to increase work efficiency by improving the drainage, non-codensing xc gizov, in the lower headers, visors are additionally installed, attached to their lateral non-condensable gases forming over the branch pipes of the outlet with inclination in the direction of air movement, vertical plates with openings in the upper and lower parts attached with the upper edge to the visors and forming with them and with lateral reservoir-forming non-condensable gas exhaust chambers, and additional plates mounted inclined towards the direction of air movement and attached to a vertical formation in between the holes; the additional plates are provided with edges with a gap relative to the lateral forming collectors. Editor I. Gorna Compiled by G. Rov Tehred L. Oliynyk Order 75A1 / 36 Circulation 569 VNIIPI State Committee for Inventions and Discoveries at the State Committee for Science and Technology of the USSR 4/3, Moscow, Zh-35, Raushsk nab. 113035 Production and printing company, Uzhgorod, st. Project, 4 Phys .2 Corrector B, Girn K Subscription