Heat exchanger

FIELD: heating systems.

SUBSTANCE: invention refers to heat exchange equipment and can be used in water treatment system of nuclear power plant. Heat exchange contains housing with heat exchange liquid inlet and outlet connection pipes, bank of V-shaped heat exchange tubes fixed in tube sheet comprising together with cover by means of a partition two chambers along the path of one of the liquids; at that, straight sections of V-shaped heat exchange tubes are put with a gap to the tubes the ends of which are rigidly fixed in separate tube sheets, and bent sections are placed in the cavity comprised with tube sheet and bottom; at that, this cavity is interconnected by means of tubular gaps with cavity and connection pipe to it, and isolated from paths of heat exchange liquids.

EFFECT: design with proposed layout of tube bank will allow obtaining small scale heat exchangers meeting the requirements of reliability, manufacturability, erection at high specific thermal stresses of the occupied volume of nuclear power plant.

2 dwg

 

The invention relates to heat-exchange technique and is intended for use as a heat exchanger monoblock marine nuclear power plant (NPP)operating on liquid metal coolant in the regime of variable loading.

A known heat exchanger pipe in pipe", mainly for viscous liquids with the inner tube, provided with an outer spiral fins and the outer pipe is made with a varying cross-sectional area decreasing in the direction of movement of the heated medium in the annular space, and the ribs have a height that increases inversely proportional to the step edges in the direction of decreasing cross-section of the outer pipe [1].

The disadvantage of this technical solution is the design complexity associated with technological support geometry changes the cross-sectional area of the outer pipe together with the change of the geometry of the fins while achieving reliable noise of the pipes relative to each other during operation. Moreover, to achieve the relevant production requires a fairly large number of such heat exchangers.

Known shell and tube heat exchanger containing a bundle of heat exchange tubes, inlet and outlet manifolds environment tubular space is elastic displacer, placed between the beam and the casing and forming with the latter a gap, and when the heat exchanger under pressure in the tube cavity exceeds the pressure in the annular space, the gap between the displacer and the casing is in communication with the inlet manifold tube space environment, and the displacer can be made of elastic material [2].

The disadvantage of this technical solution is the lack of job opportunities exchanger at high differential pressure, flow, temperature, which significantly narrows the scope of its application. In addition, when excess pressure pipe space above the pressure of the annulus on the join conditions in the cavities of the input manifold and the gap between the housing and the displacer will be missing contour tightness and organize intensive heat exchange in such difficult conditions.

The technical result of the invention is to enhance reliability of the design of the heat exchanger at high temperature Teploobmennik liquids and their hydrocarbonrich parameters during operation.

This technical result is achieved in that in a heat exchanger, comprising a housing with connections to input and output Teploobmennik liquids, bundle heat exchanger V-shaped pipes fixed in the tube plate, education is relevant with lid, through walls, two cameras on tract one of the liquids, direct heat exchange sections V-shaped pipes are placed with a gap in the pipe, the ends of which are rigidly fixed in a separate tube plate, and the bent sections placed in the cavity formed pipe Board and bottom, and this cavity is communicated through the annular gap with a cavity and a nozzle thereto, isolated tracts Teploobmennik liquids.

Information retrieval of scientific and technical achievements on this topic, thematic analysis of the inventions of patent patent library Fund for the solution of this problem has not revealed the totality of distinctive signs, and similar inherent with features of the present invention, which can be used as a heat exchanger monoblock ship NPP operating on liquid metal coolant in the mode variable loads. In accordance with the current legislation of Russia, the invention meets the criteria of "novelty", "state of the art "industrial applicability".

The essence of the invention is illustrated by drawings, where:

figure 1 is a longitudinal section of the heat exchanger;

figure 2 - cross section of the heat exchanger along a-A.

The heat exchanger includes a housing 0 with connections input 1 and 2 and output 3, 4, 5 Teploobmennik liquids, and the pipe o is 5 designed to drain residue liquid metal coolant, the bundle heat exchanger V-shaped pipe 6, is fixed in the tube plate 7 forming with the cover 8 by a partition 9 two cameras 10 and 11, and the straight sections of pipe 6 is placed in the pipe 12, the ends of which are rigidly fixed in tube plates 13 and 14, and the tube plate 14 plate 15 forms a cavity 16 that is due to the annular gap 17 is in communication with the cavity 18 and socket to it 19.

The heat exchanger works as follows.

Heat exchange process in the design of the heat exchanger is carried out in counterflow. Liquid metal coolant enters the pipe 1 and moves downwards in the annular space surrounding the surface of the pipe 12. Before the tube Board 14 and is rigidly connected with her bottom 15 of the fluid changes its direction to the opposite direction and out through the pipe 3. The heated fluid entering the nozzle 2 moves along a V-shaped pipes 6, where in the form of steam enters the chamber 11, then exits through the outlet 4 of the output.

The use of a heat exchanger construction with the proposed V-neck bundle of heat exchange tubes will allow you to get a compact heat exchanger that meets the requirements of manufacturability, Assembly and operational reliability at high specific tallapragada occupied volume monoblock ship NPU.

Literature

1. Negozi IA and other heat Exchanger pipe in pipe is". SU. A.S. No. 397737. F28D 7/10. Priority - 30.06.71. Publ. BI No. 37. 17.09.1973 - equivalent.

2. Bulls LN. Shell and tube heat exchanger. SU. A.S. No. 1064110. F28D 7/00. Priority - 06.10.82. Publ. BI No. 48. 30.12.1983 prototype.

A heat exchanger comprising a housing with connections to input and output Teploobmennik liquids, bundle heat exchanger V-shaped pipes fixed in the tube plate forming with the cover by means of a partition with two cameras on tract one of the liquids, characterized in that the direct heat exchange sections V-shaped pipes are placed with a gap in the pipe, the ends of which are rigidly fixed in a separate tube plate, and the bent sections placed in the cavity formed pipe Board and bottom, and this cavity is communicated through the annular gap with a cavity and a nozzle thereto, isolated tracts Teploobmennik liquids.



 

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FIELD: heating systems.

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FIELD: heating.

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25 cl, 30 dwg

FIELD: heating.

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FIELD: heat-and-mass transfer.

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Heat exchanger // 2358192

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5 dwg

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1 dwg

FIELD: boiler installation technology.

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18 cl, 13 dwg

FIELD: heat-exchange apparatus.

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5 cl, 7 dwg

FIELD: power engineering.

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EFFECT: enhanced efficiency.

3 dwg

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EFFECT: improved accessibility of check points and reduced time of heat-exchanger putting of operation.

3 cl, 3 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

FIELD: heat exchange.

SUBSTANCE: heat exchanger comprises housing with front and back supporting lags of different height, lens compensator, pipe bundle with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle which divides the pipe bundle into two sections. One of the sections is provided with branch pipes for supplying and discharging fluid to be heated, and the other section defines the back water chamber. The lens compensator is mounted in the vicinity of the back water chamber, and back supporting lag of the housing is provided with the additional supporting unit and mounted on the housing upstream or downstream of the lens compensator.

EFFECT: improved heat exchange and enhanced reliability.

1 dwg

FIELD: heat exchange apparatus.

SUBSTANCE: surface heat exchanger comprises casing provided with bearing lags, lens compensator, pipe bench with branch pipes for supplying and discharging heat-transfer agent, and front water chamber with the baffle that divides it into two sections. One of the sections is provided with the branch pipes for supplying and discharging of the fluid to be heated, and the other section defines the back water chamber. The pipe bench inside the housing is separated by the horizontal baffle provided with the by-pass port interposed between the lens compensator and back water chamber. The top and bottom sections of the pipe bench are separated with the vertical baffles arranged symmetrically to each other.

EFFECT: improved heat exchange and enhanced heat power and reliability.

1 dwg

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