Heat exchanger

FIELD: power engineering; low- and high-pressure regenerative systems of steam turbines or heat supply systems for water heating due to steam condensation.

SUBSTANCE: proposed heat exchanger has housing accommodating tube bank and main horizontal partitions, water inlet and water-outlet chambers with heated medium inlet and outlet pipes, and steam supply pipe running to steam space of housing; additional horizontal partition is installed in parallel with main one under each or after every one or every two main ones at distance shorter than that between main partitions; main and additional horizontal partitions are placed in casing whose upper part is attached to additional partitions on part of their outer perimeter and bottom part, to main partitions disposed under next additional partitions; the latter are joined through pressurized channels to upper main partitions. In addition, height of pressurized channel interconnecting main and additional partitions may be equal to or shorter than distance between them.

EFFECT: enhanced operating economic efficiency of heater by augmenting heat transfer due to reduction of condensate film thickness in heat-transfer surface tubes.

1 cl, 6 dwg

 

The invention relates to the field of energy and can be used in heat exchangers of the regenerative systems high and low pressure steam turbines or heat exchangers heating systems designed for heating water due to the condensation of steam.

Known surface heater containing power and drainage water camera housing with connections to steam supply and exhaust its condensate pipe system with horizontal guide walls, placed in the casing, having the entire height of the window for the passage of steam to the pipe system (Heater MO-3000-25-16-IV And the Branch directory, part II /Heat exchangers, steam turbines/,); NII EHINFORMENERGO, 1989, p.86-87, RIS).

The disadvantage of this heater is the absence of a pressure difference above and below the guide wall, preventing the passage of steam condensate through the annular clearances in place pipe penetrations heating surface through the openings in horizontal partitions. The presence of the passage of condensate through these annular gaps increases the thickness of the condensate film on the underlying pipe surface heating, which affects the process of heat transfer and lowers the efficiency of the heater.

The known heat exchanger, comprising power the drainage water chamber, housing with connections for steam inlet and condensate outlet, inside of which is installed pipe system with horizontal baffles are placed in the casing with holes placed in a checkerboard pattern on diametrical sides of the shroud (SU # 1315721, F 22 D 1/32; published 07.06.87).

By the combination of features of this known heat exchanger is the closest to the claimed and accepted as a prototype.

The disadvantage of this heater is the need for steam supply to the beam pipe (pipe system) through the holes in the casing, positioned diametrically of the parties, which requires passing ˜50% of steam between the casing and the pipe system, which requires increasing the diameter to ensure sufficient cross-section for the passage of steam. Furthermore, the difference in vapor pressure above and below the horizontal baffles that prevent the passage of steam condensate through the annular clearances in place pipe penetrations through openings in horizontal partitions can only be achieved in 50% of these partitions.

The inventive solution allows to increase the efficiency of the heater by the intensification of heat transfer by reducing the film thickness of the condensation heat transfer surface.

Proposed a heat exchanger comprising a body placed in it tube bundle and the OS is ESD horizontal rails, power and water diversion chamber with a nozzle inlet and outlet of the heated medium and a pipe for supplying steam in the steam case, and under each, or through one or two main horizontal wall parallel to it at distance smaller than the distance between the main walls, installed additional horizontal partition, the primary and secondary horizontal partitions enclosed in the casing, the upper part of which is attached to the additional partitions on part of their outer perimeter, and the lower the main partitions located above the following additional partitions, and additional partitions are connected airtight channels with upper primary partitions. In addition, the height of the sealed channel that connects the primary and secondary partitions, can be equal to or greater distances between them.

The invention is illustrated in the drawings, in which figure 1 is a perspective view of the heat exchanger, figure 2 is a section along a-a in figure 3 - section B-B figure 4 - section C-C, figure 5, 6 - options the heat exchanger with different height of the sealed channel.

The heat exchanger includes a vertical housing 1 holds tube bundle 2 and the main horizontal partitions 3, power 4 and drain 5 camera with the Patra is kami entrance 6 and exit 7 of the heated medium and the steam supply pipe 8 in the steam volume of the housing 1. Under each, or through one or two main horizontal wall 3 parallel to it at distance smaller than the distance between the main walls, installed additional horizontal partition 9. The main 3 and 9 more horizontal partitions enclosed in the casing 10, the upper part of which is attached to the additional partition 9 on their outer perimeter, and the lower the main walls 3 above the following additional partitions. Additional partitions 9 are connected in a sealed channels 11 with upper primary partitions 3.

The height of the sealed channel 11 connecting the main 3 and 9 more partitions may be equal to or greater distances between them. Pipe system 2 separated primary and secondary partitions for different heights of the compartments 12 and 13 and it comes with a vertical perforated pipe 14 for removal of non-condensable gases. In the Central part of the additional partitions 9 holes 15 for the release of non-condensable gases from the compartments 13. On the housing 1 has an inlet for condensate output pair 16. Power 4 and drain 5 camera welded to the tube plate 17.

The heat exchanger works as follows.

The heated water through the pipe 6 enters the power chamber 4, overset the first and second motion in the pipes of the pipe system 2 and returned to the discharge chamber 5, whence it is discharged through pipe 7. Heating the water in the pipes of the pipe system occurs by condensation of the steam entering into the housing 1 through the pipe 8. Pairs at the entrance to the housing 1 is divided along its height and is included in compartments 12, bounded by the perimeter of the casing 10 with only one hand, in that place, where the casing 10 has a window for entry of steam in the pipe system 2. In its motion pairs pass through the first pipe to the second, and then first moves heated water, condenses, and neskondensirovannyh gases (air) are perforated tube 14 and through the corresponding nozzle is removed from the heat exchanger. Given that the movement in the compartments 12 pairs washes the maximum number of rows of tubes, loss of steam pressure in these compartments the maximum. Total heating surface, enclosed in compartments 12, significantly more of the total surface of the heating compartment 13, so it is not necessary to increase the clearance for the passage of steam between the casing 1 and the casing 10 to the pipe first move in the area of the compartments 13. In the compartments 13, limited additional partition 9 and above it the nearest main wall 3, pairs of clearance between the body 1 and the pipe system 2 is supplied simultaneously to the tube heating surfaces of the first and second stroke of the heated water and moves from the periphery of the pipe system is neither the center of the heat exchanger (figure 1 and 4). The number of rows of tubes, washed by the steam flow in two times less than the steam pressure in the compartments 12 and so the loss of steam pressure in the compartments 13 will be less than in the compartments 12. Condensibles gases from the compartments 13 are discharged into downstream compartments 12 through the openings 15. Therefore, the average steam pressure in the compartment 13 will be more steam pressure in the compartment 12. This pressure difference will prevent the passage of steam condensate through the annular gaps formed during the passage of the pipes of the heating surface through the holes in the main horizontal partitions 3, located in close proximity on additional partitions 9. Condensate of the heating steam from these main walls 3 will merge through the channels 11 under additional partitions 9, no flooding downstream sections of pipe heating surface (figure 4, 5, 6), which will lead to the decrease of the film thickness of the condensate on the heat exchanger surface. During its further movement of the condensate is fed to the tube Board 17 and together with the condensate from the partition 9 is removed from the heater through the pipe 16.

Thus, through an appropriate installation of the casing, the main and additional horizontal partitions, the United sealed channels, provided the intensification of heat transfer on the part of the pipe surface is the surface of the heating pipe systems and increases the efficiency of the heater.

1. The heat exchanger includes a body placed in it tube bundle and the main horizontal rails, power and drainage chamber with a nozzle inlet and outlet of the heated medium and a pipe for supplying steam in the steam volume of the housing, characterized in that for each, or through one or two main horizontal wall parallel to it at distance smaller than the distance between the main walls, installed additional horizontal partition, while the primary and secondary horizontal partitions enclosed in the casing, the upper part of which is attached to the additional partitions on part of their outer perimeter, and the lower the main partitions, above the following additional partitions, and additional partitions are connected airtight channels with upper primary partitions.

2. The heat exchanger according to claim 1, characterized in that the height of the sealed channel that connects the primary and secondary partitions, can be equal to or greater distances between them.



 

Same patents:

Heat-exchanger // 2263265

FIELD: heat-exchanging equipment, particularly for machine-tool, chemical, power and other industries to cool process medium.

SUBSTANCE: heat-exchanger comprises cylindrical body with flat closures and removable radiator made as two coaxially arranged coils. Coil ends are fastened to orifices formed in flat closures through boss-like tube plates. Heat-exchanger also has inlet and outlet pipes adapted to supply and discharge working medium. The body is divided into two cavities by partition having central orifice. Installed in the orifice is tube transmitting liquid to be cooled from one cavity into another one and extending along heat-exchanger axis. Coils are arranged in different cavities in opposition one to another. Tube plates of each coil are installed in orifices of one closure. Orifices for inlet and outlet pipes are formed in different cavities near the partition. Cooling medium supply to coils and discharge from the coils in both cavities is carried out trough T-branches installed on tube plates of one of the closures and through kneepieces connected to tube plates of another closure.

EFFECT: increased efficiency of heat removal.

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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.

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FIELD: heat exchange apparatus.

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EFFECT: improved heat exchange and enhanced heat power and 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.

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FIELD: heat exchange.

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EFFECT: improved heat exchange and enhanced reliability.

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

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

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FIELD: heat-exchange apparatus.

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EFFECT: simplified structure and enhanced reliability.

5 cl, 7 dwg

FIELD: boiler installation technology.

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

18 cl, 13 dwg

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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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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.

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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.

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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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