SU1147893A1 - Device for supplying feed water to steam generator - Google Patents

Abstract

DEVICE FOR DATA feedwater to a steam generator comprising conductive TRU0U inlet end with .uchastkom, zavedonnym through a hole in the drum and covered to form an annular gap cap tightly bonded to said bottom portion of the service pipe and the edges with the inner surface of the drum, wherein that, in order to increase reliability by reducing the likelihood of depressurization, the supply pipe in the area located outside the drum is covered by an additional cap tightly fastened with the bottom and edges, respectively, with said pipe and outer surface of the drum and forming a closed buffer cavity with the first cap. CZ

Description

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00 The invention relates to energy and can be used in drum steam generators. A device is known for introducing feedwater into a steam generator comprising a supply pipe with an end section inserted through a hole in the drum and a cap tightly bonded with a bottom and edges with the supply pipe and the outer surface of the drum, respectively, to form an annular gap. A disadvantage of the known device is reduced reliability due to corrosion of the cap and the inlet pipe, since the cavity formed by the cap and the inlet pipe is a stagnant zone in which sludge can fall out. Closest to the present invention is a device for feeding water into a steam generator comprising a supply pipe with an end section inserted through an opening into the drum and a cap covered with an annular gap, a tightly bonded bottom with the said section of supply pipe and edges drum surface {2. However, this device is characterized by reduced reliability due to the increased likelihood of its depressurization, which can occur when leaks appear at the junction points of the hood to the final section of the supply pipe and the inner surface of the drum. The aim of the invention is to increase the reliability of the device for injecting feed water into the drum of the steam generator by reducing the likelihood of its depressurization. The goal is achieved by the fact that in a device for feeding feed water into a steam generator, containing a supply pipe with a final yacTKOM, wound through a hole in the drum and covered with a cap forming a ring gap, tightly bonded with a bottom of the supply pipe and edges with the inner surface of the drum, the supply pipe in the area located outside the drum, is covered by an additional cap, tightly fastened bottom and edges, respectively, with the said pipe and the outer surface of the drum and forming a cap to the first buffer cavity closed. The drawing shows schematically a device for feeding feed water to a steam generator, a general view. A device for feeding feedwater to a steam generator contains a supply pipe 1 with an end section inserted through an opening into the drum 2 and a cap 3 covered with the formation of an annular gap with the latter tightly fixed to the bottom with the said section of the supply pipe 1 and the edges with the inner surface of the drum 2. The supply pipe 1 in the area located outside the drum 2 is covered by an additional cap 4, tightly bonded with the bottom and edges, respectively, with said pipe 1 and the outer surface of the drum 2 and forming A closed buffer cavity 5 with the first cap 3. The latter can be filled under pressure with a heat insulating material, for example, a gas that creates a counterpressure. A liquid solid can also be used as a heat insulating material, which expands when heated. Device to enter the feed water in. the steam generator drum works as follows. Feed water is supplied to drum 2 through pipe 1. Buffer cavity 5 protects from overcooling cap 3, the wall temperature of which is maintained almost equal to the temperature of hot water in drum 2. This helps to eliminate temperature stresses in cap 3. At this, cap 4 also does not to the occurrence of thermal stresses in the drum 2, since its length is several tens of times its thickness, the cap 4 itself has a low thermal conductivity and is separated from the supply pipe 1 by the buffer cavity 5. Thus, ue cap covering schzpo supply pipe outside of the drum and sealed bottom and edges, respectively, with lead-in tube and the outer surface of the drum and forming with kol31147893

A pack located in the drum reduces the likelihood of depressurization, the closed buffer cavity reduces thereby the reliability of the thermal stress in the drum of the supply for feeding water and the cap located in it into the steam generator.

Claims (1)

A device for introducing feed water into a steam generator, comprising a supply pipe with a final section inserted through a hole in the drum and enclosed with a cap, forming an annular gap, tightly fastened to the said section of the supply pipe and edges with an inner surface of the drum, characterized in that , in order to increase reliability by reducing the likelihood of depressurization, the inlet pipe in the area located outside the drum is covered by an additional cap, tightly fastened to the bottom and edges and, respectively, with the aforementioned pipe and the outer surface of the drum and forming a closed buffer 3 cavity with the first _Λ first cap. SLLo> 1147893>