Heat exchanger

FIELD: heating systems.

SUBSTANCE: heat exchanger includes housing with bank of heat exchange tubes fixed in tube sheets, feed water supply tube, feed water header, superheated steam header, electric cable for magnetohydrodynamic pump; it is equipped with shell located inside bank of heat exchange tubes; at that, tube sheet of superheated steam header is fixed in series of shell, feed water supply tube is located coaxially and with a gap relative to shell with possibility of thermal expansion towards feed water header.

EFFECT: heat exchanger design of the proposed type allows increasing heat exchange intensity, uniformity of temperature field in cross section of tube bank, operating reliability owing to possibility of moving tube bank at thermal linear expansions.

1 dwg

 

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

Known heat exchanger element type "pipe in pipe" with adapter for environments where the adapter is made in the form of a shaped tube forming with the outer pipe peritonei window for a medium flowing in the annular space between the pipe and having axial and radial channels connected to the inner pipe and bred outside of the outer pipe [1].

The disadvantage of this technical solution is the presence of a structural gap in the connection fitting of the tube with the tube which can lead to cracks in the weld in the welding process, and when working in conditions of high teplosnabjenie due to the temperature difference between the pipe and the fitting tube. The process of crack initiation contributes to the vibration of the inner tube. In addition, in a dense bundle of heat exchange elements difficult to secure entrance of the heating fluid in the channel inner tube. A significant drawback of this design of the heat transfer element is the relatively low intensity of heat exchange between the heat and agrave the second fluid, and as a consequence, the low values of the output of the steam quality when using a heat exchanger element as part of a modular heat exchanger ship NPU.

Known heat exchanger element type "pipe in pipe", mainly tube field, and the inner tube has a variable thickness, gradually changing along the environment [2].

The disadvantage of this technical solution is the low reliability of the heat exchange element, due to the design of the inner pipe, so as welds joined sections of this pipe can cause cracks in the regime of variable thermal Cycling stress during usage, as well as the presence of large hydraulic resistance in the flow of fluid in pipe bore inner pipe due to its sharp extensions. This will be facilitated by the vibration of the inner pipe relative to the outer, as the fluid flow moves under high pressure. In addition, deteriorating process of heat exchange between the heating and heated fluids due to the influence of surge flow of the heated fluid passing through the line section "liquid-gas".

The technical result of the invention to increase the service life by improving the reliability of the design of the heat exchanger at high specific tallapragada occupied volume, smart is the solution of the flow resistance under conditions of high temperature Teploobmennik liquids and their hydrocarbonrich parameters as well as the intensification of heat transfer by increasing the surface of the heat removal during operation.

This technical result is achieved by a heat exchanger, comprising a housing with a bundle of heat exchange tubes, fixed in the tube plate, the tube supplying the feed water manifold feed water reservoir of superheated steam, the electric cable for magnetohydrodynamic pump, equipped with a drum located inside the bundle of heat exchanger tubes and tube plate collector superheated steam strengthened in rassechku shell, a pipe for supplying feed water is coaxially aligned with the gap to the ring with the possibility of thermal expansion in the direction of the collector feed water.

Summary of the invention illustrated by the drawing which shows a longitudinal section of the heat exchanger.

The heat exchanger includes a housing 0 with the pipes 1 and 2 respectively of nutrient input and water output of superheated steam, the perforated portion 3 of the input carrier and the annular space 4 its release. Inside 0 installed: bundle of heat exchange tubes 5, strengthened lower ends to the tube plate 6 "floating head", which has the collector 7 of the feed water, and the upper ends in the tube plate 8 rigidly connected to the casing 0, forming with the tube Board 8 collector 9 overheated the th pair, and shell, cut into pieces 10 and 11, and the tube plate 8 is rigidly fixed to rassechku shell between the parts 10 and 11. In the cavity of the shell, coaxial her with a backlash installed pipe 12 for supplying feed water, and the upper end is rigidly connected to the case 0, and the lower end is left free for linear displacements due to the gap between the pipe 12 and the shell.

The heat exchanger works as follows.

The coolant enters the body 0 of the heat exchanger through the perforations 3 and is distributed in the annular space, where there is intense heat. Further, the fluid moves between case 0 and "floating head", then through the annular space 4 is outside of the heat exchanger. Feed water through the pipe 1 supply of feed water enters the collecting chamber from the pipe 12 for supplying the feed water enters the collector 7 "floating head", where through the throttle input device sections evenly dealt heat pipes 5. Next, enters the collector 9 of superheated steam in the annular space between the casing 0 and part 10 of the shell and out through the pipe 2 superheated steam.

Performing a heat exchanger construction of the proposed form will allow you to apply it as a module of the heat exchanger submersible type steam Korabel is a high the Oh NPU, running on liquid metal coolant in the mode variable loads that meet the requirements of reliability, ease of installation, high specific tallapragada occupied volume.

Link

1. Zubkov ET and other heat Exchanger element. SU A.S. N 399708. F28D 7 /10. Priority - 16.09.71. Publ. Bulletin of inventions No. 39. 03.10.1973 - equivalent.

2. Dunav Y.A. and other heat Exchanger element type "pipe in pipe". SU. A.S. N 422935. F28D 7/10. Priority - 15.11.71. Publ. Bulletin of inventions No. 13. 05.04.1974 prototype.

A heat exchanger comprising a housing with a bundle of heat exchange tubes, fixed in the tube plate, the tube supplying the feed water manifold feed water reservoir of superheated steam, the electric cable for magnetohydrodynamic pump, characterized in that it is equipped with a drum located inside the bundle of heat exchanger tubes and tube plate collector superheated steam strengthened in rassechku shell, a pipe for supplying feed water is coaxially aligned with the gap to the ring with the possibility of thermal expansion in the direction of the collector feed water.



 

Same patents:

Heat exchanger // 2379610

FIELD: heating systems.

SUBSTANCE: heat exchanger includes housing with bank of heat exchange tubes fixed in tube sheets, feed water supply pipe, feed water header, superheated steam header, electric cable for magnetohydrodynamic pump; feed water header is made in the form of flattened cone the big base of which faces tube sheet.

EFFECT: improving heat exchange intensity and operating reliability of heat exchanger.

1 dwg

Heat exchanger // 2379609

FIELD: heating systems.

SUBSTANCE: heat exchanger includes housing with bank of heat exchange tubes fixed in tube sheets, feed water supply pipe, feed water header, superheated steam header, electric cable for magnetohydrodynamic pump, equipped with blowout pipe, at that, electric cable for magnetohydrodynamic pump and blowout pipe are located inside feed water supply pipe.

EFFECT: improving heat exchange intensity and operating reliability of heat exchanger.

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Heat exchanger // 2378595

FIELD: heating systems.

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5 dwg

Heat exchanger // 2378594

FIELD: heating systems.

SUBSTANCE: invention refers to heat exchange equipment and is intended for being used as heat exchanger of nuclear power plant operating in variable load mode. In heat exchanger containing the housing with bank of heat exchange tubes, which is located inside it, exchange tubes are fixed in tube sheets, and bank of parallel located corrugated plates in tubular volume, two opposite walls of the housing are corrugated and parallel to bank of plates, and two other ones are flat; each tube is also bent as per plate profile, located between them and equipped outside in straight sections with screw-shaped ribs with changing swirl angle, and inside - with band with swirl direction opposite relative to ribs; at that, in tubular volume there arranged are ejectors which are made in the form of rods fixed in additional tube sheets and located equally spaced.

EFFECT: increasing heat exchange intensity owing to uniformity of temperature field in cross section of heat exchange tube bank, improving operating reliability owing to decrease of relative deformation of tubes at thermal linear expansions.

3 dwg

Heat exchanger // 2378593

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.

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2 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to heat engineering and can be used in heat exchangers used in various industries, namely in regenerative heat exchangers of gas turbine plants of nuclear reactor industry. Invention consists in the fact that vortex heat exchange element includes heat exchange cylindrical tubes of large diametre located coaxially one inside the other and internal tube with cylindrical surfaces; at that, tube of large diametre is divided into sections, inside each tube there installed are at least two swirlers of the same or various type; at that, one swirler - at the section inlet, and the other one - at some distance between them, which is determined by damping of rotary movement of vortex flow at complete heat loads. Besides inlet of heat carriers to each section of tube of large diametre and internal tube is made either on one and the same side or on opposite sides in relation to flow movement, thus providing both counterflow and direct-flow scheme of heat carriers movement in element, at that, internal tube with cylindrical surfaces is made from bimetal; at that, material of internal tube surface from the side of hot heat carrier has thermal conductivity factor which is 2.0-2.5 times higher than material of internal tube surface from the side of refrigerating heat carrier.

EFFECT: improving use efficiency of vortex method of heat transfer in heat exchange devices.

3 dwg

FIELD: food industry.

SUBSTANCE: production method of milk product in product conduit provides for stage of insertion through this conduit by continuous injection at least one sterol ether and/or stanol fithout thickener at temperature specified T1 equal or higher mentioned ether melding point namely from 35 to 80C into milk composition having preset temperature T2 at least equal T1 corresponding initial composition on milk base containing milk proteins and without emulsifier to produce emulsifier non-containing mixture. Adding of sterol ether and/or stanol ether is performed before homogenisation stage of mentioned mixture.

EFFECT: method provides for production of product having improved structural and rheological and organoleptic properties.

7 dwg, 6 ex

FIELD: heating systems.

SUBSTANCE: method for performing heat exchange involves consequent cooling of the first fluid medium by indirect heat exchange with the second fluid medium, in which there are the following stages: - introduction of the first fluid medium subsequently at least into two bundles of concentrical U-shaped tubes comprising at least the first heating zone and the second heating zone correspondingly, - introduction of the second fluid medium to the side of casing of U-shaped tube bundles; at that, each heating zone is partially separated from the other one by means of a wall, the first heating zone is a colder zone and the second heating zone is a hotter heating zone, tube bundle of the first heating zone which is colder is made from low-alloyed steel, and tube bundle of the second heating zone which is hotter is made from thermal resistant and corrosion resistant alloy; - drain of the second fluid medium which is cooled and the first fluid medium which is heated. Invention also refers to heat exchanger intended for implementing the above described method.

EFFECT: improving heat exchange characteristics owing to improved resistance to metal dusting and to corrosion damage.

2 cl, 3 dwg

FIELD: heating systems.

SUBSTANCE: invention refers to physical and chemical process technology, namely to process and reactor for performing heat exchange reaction. Heat exchange reaction performing process involves reagent flow supplied to catalytic material layer, which is located for example outside one heat transfer tube with double walls in heat exchange reactor, contact of reagent flow to catalytic material at indirect heat exchange with medium-heat carrier available in annular volume of at least one heat transfer tube with double walls; at that, in annular volume there installed is one or more bracing elements forming spiral flow path of medium-heat carrier around internal heat exchange tube at least of one heat exchange tube with double walls. Invention also includes heat exchange reactor for carrying out the above reaction.

EFFECT: improving heat transfer at carrying out heat exchange reaction.

10 cl, 13 dwg

FIELD: heating.

SUBSTANCE: invention is of relevance for operation of apparatus for air cooling of gas and is to be utilised in power engineering industry. The proposed method of the heat exchanger apparatus fabrication envisages the following activities: fabrication of finned heat exchange tubes, a framework, at least a single apparatus section with lateral walls and beams joining them together, gas inlet and outlet chambers; packing the section with a bundle of finned one-way-flow heat exchange tubes; fabrication of a manifold for gas supply and removal, a support structure and their assembly. The section walls are represented by channel bars with shelves turned towards the tubes and are equipped with fairing displacers forming the U-bar reinforcement ribs. One of the methods of the apparatus heat exchanger section fabrication envisages positioning an optimal number of tubes within the section in accordance with the dependence specified within the framework of the invention concept. An alternative method envisages assembly of the section elements on a holding frame designed within the framework of the invention concept. A third method envisages assembly of the elements in a specific sequence combined with performance of hydraulic pressure testing. The method of fabrication of the apparatus chamber for gas inlet or outlet envisages manufacture of the chamber elements and their assembly in a sequence developed within the framework of the invention concept. The method of fabrication of the gas delivery and removal manifold envisages manufacture of the manifold body sections and their assembly with the help of the tool tab designed within the framework of the invention concept. Method of hydraulic pressure testing of the apparatus sections envisages mounting the section to be tested on the hydraulic test bench designed within the framework of the invention concept with the pressure increase and drop modes as per the dependence given. Method of the manifold hydraulic pressure testing envisages it being mounted on the hydraulic test bench or a loft with the help of support structures designed within the framework of the invention concept.

EFFECT: enhanced effectiveness and precision of assembly of the apparatus and elements thereof combined with reduction of labour and material consumption, reduction of hydraulic losses occurring in the apparatus as well as technological simplification of the hydraulic pressure testing of heat exchanger sections and manifolds of the apparatus for air cooling of gas, improved effectiveness and reduced labour intensity of their performance.

25 cl, 30 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method, inner pipe is fitted into outer pipe after shape-treatment of at least outer surface of inner pipe or inner surface of outer pipe, and after fitting inner pipe outer pipe, inner pipe is expanded to bring outer surface of inner pipe in tight contact with inner surface of outer pipe, and shape-treatment of surface forms at least one channel to reveal leakage between two pipes. Before fitting in pipes at least outer surface of inner pipe or inner surface of outer pipe is coated with layer of solder, for instance, tin, and inner pipe is expanded so that outer pipe also expands, and solder layer between inner and outer pipes is melted. Outer pipe is expanded so that melted layer of solder is forced out from space between inner and outer pipe at least intone channel to reveal leakage. Such heat exchange pipe contains assembly unit consisting of outer pipe and inner pipe fitted at tight contact in between and at least one channel to reveal leakage passing in contact surface and near the surface between inner and outer pipes. Thin film-like layer of solar material, such as tin, is provided in place of contact between inner and outer pipes which, owing to melting, connects with inner pipe and outer pipe, inner and outer pipes adjoining with displacement. Invention makes it possible to increase heat transfer to value equal to or practically equal to that of solid heat exchange pipe and channel to reveal leakage remains free from filling medium, thus providing accurate and reliable revealing of leakage.

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15 cl, 6 dwg

FIELD: heat power engineering, applicable in designing and production of heat exchangers with tube plates and in other branches of industry.

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EFFECT: idle time, enhanced utilization factor of the heat exchanger, as well as enhanced strength of the structure in static and especially dynamic modes of operation.

5 dwg

FIELD: baking industry.

SUBSTANCE: proposed plant includes trap hood and heat exchange cooling unit connected with it and mounted under it; cooling unit includes jacket with pipe line located over its center. Heat exchange cooling unit is used for forced circulation of cold air between jacket and pipe line inside it directing the flow in required direction: in cold season outside air is delivered and at hot season air from floor areas is delivered.

EFFECT: simplified construction; enhanced ecology; saving of water.

1 dwg

FIELD: boiler installation technology.

SUBSTANCE: boiler installation has boiler provided with burners, hot-water heater, heat exchangers passing through boiler and hot water heater, economizer and heat exchanger with heat exchanger passing it through. All the units of boiler installation are fixed at the same platform. Case of hot-water heater has several shells; cavities among shells are intended for filling with air and feed water. Cavity intended for filling with feed water is included into feed water circuit between feed water pump and economizer. Cavity intended for filling with air is connected with burners and blower. Heat exchanger disposed inside boiler is made in form of spiral envelopes disposed coaxially. Each envelope is formed by heat-exchange tubes connected with feeding and receiving boards. Envelopes having smaller diameters are shifted to combustion chamber made in form of two sequentially disposed cavities. Heat-exchange tubes of heat exchanger are made to have two sections. Tubes of the first section are made to touch tubes from the second section. Tubes of the second section are put in spiral envelopes to form gaps between surfaces of envelopes.

EFFECT: reduced size and weight of boiler installation, steam boiler and heat exchanger.

18 cl, 13 dwg

FIELD: heat-exchange apparatus.

SUBSTANCE: air cooler comprises vortex heat exchangers, pipes of the vortex heat exchangers for flowing air to be cooled flows, swirlers, and actuator of purifying mechanisms. The actuator has hollow driving shaft mounted in the pipes and provided with a longitudinal groove throughout its length. The groove receives unmovable screw with a nut coupled with the bushing freely mounted on the shaft through a key. The brush holder with brushes are secured to the bushing. The outer side of the pipes of the vortex heat exchangers are provided with chutes for circulating a coolant. The vortex heat exchangers has a fining with a coefficient that varies according to the relationship where D is the diameter of the pipe, n is the number of chutes, and l is the chute width. The parameters vary in the following range: D = 50-800 mm and l = 20-50 mm. The chute height l1 =3-40 mm, the thickness of the pipe wall and the thickness of the chute wall

EFFECT: simplified structure and enhanced reliability.

5 cl, 7 dwg

FIELD: power engineering.

SUBSTANCE: heat exchanger comprises pipes with spiral-ring fins. The fins are provided with longitudinal slots. The pipes in the heat exchanger are arranged vertically.

EFFECT: enhanced efficiency.

3 dwg

FIELD: equipment for gas cooling and moisture condensing, particularly for atomic power plants.

SUBSTANCE: apparatus comprises shell and coiled tube arranged inside the shell. The shell includes three sections, wherein coiled tube is secured inside middle section. Middle section has oppositely located inlet and outlet pipes for medium circulating in tubes. Coiled tube is formed as straight horizontal tubes with adjacent ends connected through U-shaped branches arranged in removable end sections of the shell, wherein the branches are turned one relative another so that three-dimensional coiled tube mound around vertical axis in formed. The inlet and outlet pipes are arranged in end shell sections, wherein mounting planes thereof are parallel to longitudinal shell axis.

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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