SU1124160A1 - Steam-water heater - Google Patents

Abstract

A steam and water heater, comprising a housing with a bundle of heat exchanging pipes separated by horizontal guiding partitions into sections, and a non-condensable gas exhaust pipe, with each a fj i section of the beam pipes covered by a vertical casing to form a condensate cooling chamber fitted from the non-condensing gas exhaust pipe side with an irrigator, which is characterized by the fact that, in order to increase efficiency by reducing steam losses with non-condensing gases, all housings are tightly attached to the lower rodkami its sections, and cooling the condensate in each chamber additionally installed vertical sheet closely adjacent the top wall and forming a gap with the bottom wall of its section.

Description

The invention relates to energy and can be used in devices for heating water with steam taken from the intermediate stages of the turbine. A steam heater is known, containing one-in-one cases, in the space between which there is a bundle of heat exchange tubes, divided by horizontal guide walls into sections, and a non-condensable exhaust gas pipe -pj. The disadvantage of such a preheater is the reduced intensity of heat exchange due to the large amount of non-condensing gases in the beam, since the temperature of the inner case may exceed the temperature of the condensate formed by the steam condensate between the hulls and as a result this condensate opens, which can lead to violation of the specified movement of the main steam flow, organized removal of condensate from the guide walls, steaming of the non-condensable exhaust pipe and accumulation of non-condensable gases h bundle of heat exchange tubes. The closest technical solution to the invention is a steam-water heater, containing a housing with a bundle of heat exchanging pipes divided by horizontal guiding partitions into sections and with a non-condensable exhaust pipe, and in the section of section the beam pipes are enclosed by a vertical housing with a condensate cooling chamber equipped with - side of the pipe non-condensable gas irrigator d. The disadvantage of the known preheater is a lower efficiency due to large steam losses with non-condensable gases, due to the fact that not all condensate that has fallen into the casings passes through the sprinkler: part of the sgo is pressed through the openings of the lower walls of the vertical casings and is carried away to the lower part of the housing, not participating vapor condensation directly in front of the non-condensing gas exhaust pipe, as well as the fact that the cooling chamber of the condensate in each section is made only from some part of the height of this section in the chamber Vano countercurrent movement of condensate and water. The aim of the invention is to increase the efficiency of the steam / water preheater by reducing steam losses with non-condensable gases. This goal is achieved by the fact that in a steam-and-water preheater containing a housing with a bundle of heat exchange tubes divided by horizontal guiding partitions into sections and a drain pipe of non-condensing gases, each section of the bundle tubes is covered by a vertical casing with the formation of a cooling chamber the condensate, supplied to the so-called side of the non-condensable gas removal pipe with an irrigator, all housings are tightly fastened to the lower partitions of their sections, and in each condensate cooling chamber there is an additional A vertical sheet is fitted tightly adjacent to the upper partition and forming a gap with the lower partition of its section. FIG. 1 shows a schematic of a steam-water heater, a general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 1. A steam-water preheater comprises a housing {with a bundle of heat exchange tubes 2, divided by horizontal guide walls 3 into sections, and a tube 4 for removing non-condensable gases. In each section, part of the tubes 2 of the beam is enclosed by a vertical casing 5 with the formation of a condensate cooling chamber 6 provided from the frictionless discharge of non-condensing gases with an irrigator 7. All the housings 5 are tightly fixed to the lower partitions of their 3 sections, and in each chamber 6 condensate cooling a vertical sheet 8 is installed, Sheet 8 is located with a close abutment to the upper partition 3 and with the formation of a gap with the lower partition 3 of its section. In case 1, case 9 is installed with a bundle of heat exchanging pipes 10. Pipes 2 and 10 are fixed with ends in a tube plate II of a water chamber 12. The housings} and 9 are equipped with connecting pipes 13 and 4 for supplying heating steam and connecting pipes 15 and 16 for condensate discharge respectively. The heater along the heated water is made multi-way, and the covers 5 are covered by the pipes of the first course. In partitions 3, inlets I7 are complete. The steam heater operates as follows. The heated water is successively passed through pipes 2 and 10, in which it is cooled mainly due to condensation of the heating steam entering the housing I through the rail 13 and into the housing 9 through the branch pipe 14. Thanks to the guiding partitions 3 and the inner housing 9 heating steam. in the inter-shell space, it moves in two streams in the direction of the non-condensable gas withdrawal pipe 4. In the same direction, the steam produced by the boiling up of condensate on the outer wall of the housing 9 moves. A part of the condensate condensation formed in the condensation result flows through the openings 17 of the partitions 3 into the cooling chambers 6, where, due to the sheets 8, it is first lowered to the lower partitions 3 its sections and is rotated by 180, and then longitudinally washes the pipes 2 of the first stroke in countercurrent and at the same time cools. Re-cooled condensate in condensers 7 condenses the steam directly around the non-condensable exhaust pipe 4, thereby eliminating its steaming. Due to the fact that all the housings 5 are tightly fastened to the lower partitions of 3 of their sections, the depth of supercooling of the condensate increases, since in chambers b pipes 2 are involved in heat exchange along the entire height of the sections. In this practice | Practically, all condensate is involved in the condensation of steam in front of pipe 4, since condensate leaking through the openings of the steam section of the sixth section inevitably falls. into the chamber 6 of the downstream section. The sheets 8 cause the condensate to move; with a counterflow to the heated water, which also increases the depth of supercooling of the condensate. Increasing the supercooling depth of the condensate in the chambers 6 eliminates the steaming of the pipe 4 for the removal of non-condensing gases and thereby reduces the loss of steam that is traced to the latter. through the pipe 4, which increases the efficiency of the steam-water preheater.

sixteen

FIG. one

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FIG. 3

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Claims (1)

A STEAM-WATER HEATER containing a body with a bundle of heat-exchange tubes separated by horizontal guide baffles into sections and a non-condensable gas exhaust pipe, in each section a part of the bundle pipes is covered by a vertical casing with the formation of a condensate cooling chamber equipped with a sprinkler on the side of the non-condensable gas removal pipe, which differs in order to increase efficiency by reducing steam losses with non-condensing gases, all enclosures are tightly bonded to the lower partitions' of its sections, and in each condensate cooling chamber an additional vertical sheet is installed, which is closely adjacent to the upper partition and forms a gap with the lower partition of its section. G FROM