The heat exchanger
(57) Abstract:The invention is intended for use in the field of energy and chemical engineering. The heat exchanger includes a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation of the heat transfer media installed in channels with full and partial overlap of the latter, and according to the invention, each wall is connected at one end with the adjacent wall, and on the other side with the wall located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between the rows and between the rows and the housing. The invention reduces the hydraulic irregularity and to increase the compactness of the heat exchanger. 2 Il. The invention relates to the field of energy and chemical engineering and can be used in various types of heat transfer equipment such as heat exchangers, heaters, refrigerators, coolers and dieticheskim, chemical, medical and otherA significant part of the plate heat exchanger consists of a set of parallel plates, stacked and sealed relative to each other so that the plates are formed of alternating channels for circulation of heat transfer media. Thus, the interconnected pairs of plates form the corresponding cavity for passage of a coolant, and the alternation of these pairs and connect them to the appropriate reservoir inlet and outlet of the heat exchange mediums form a plate heat exchanger. Power case with this design of the heat exchanger is not required, and ensuring the strength of the heat exchanger when the pressure above 0.1 MPa is produced by compression of the plate pack with plates and tightening elements.Such heat exchangers are different from other types of heat exchangers are more compact heat exchange surface per unit volume, lower weight and overall size and cost (see, for example, N. In. Baranowski, L. M. Kovalenko, A. R. Yastrebenetsky, "Plate and spiral heat exchangers", Moscow, Mashinostroenie, 1973, pp. 45-46).The disadvantages of these Teploobmennik significant differential pressure between the plates (>1 MPa).Another type of plate heat exchangers can operate at pressure drops up to 4.5 MPa. Structurally they are made of a set of flat tubes, sealed at the edges in the tube plate, and then installed and sealed in the power case. When this one moves inside the flat tubes, and the other in the annular space, i.e. between the pipe and the inner surface of the housing (see, for example, ibid, pages 32-35).The disadvantages include less compact surface in comparison with the heat exchangers described above.Known plate heat exchangers, which includes the positive qualities of both kinds of the above-described heat exchangers (see, for example, the patent of the Russian Federation 2099663 of 20 December 1997).The heat exchanger described in the patent of the Russian Federation, provided with a housing space inside of which is divided into zones, within which is placed a heat-exchange elements, consisting of a set of walls facing the outer edges in toward the body, and the inner edges toward the inner edges of the walls of adjacent areas and combined with the outer edge of one adjacent wall, and on the other end with the other adjacent wall forming channels for circulating heat exchange with full or partial overlap of the latter.The disadvantage of this design is the large number of peripheral cells around the perimeter of the heat transfer element of each zone on the areas between the heat exchange element and the housing and between the heat exchange elements adjacent zones. Peripheral cell is different from the regular (primary, current) cell formed adjacent walls, increased reduced cross-section and, as a consequence, a large equivalent hydraulic diameter. This leads to the hydraulic non-uniformity between cells and causes deterioration of thermal-hydraulic characteristics of the heat exchanger as a whole.On the greatest number of common characteristics and achieved the effect of the patent of the Russian Federation 2099663 chosen for the prototype.Task - improving the efficiency of the heat exchanger by reducing the hydraulic uneven and increase the compactness of the heat exchanger.The problem is solved due to the fact that in a heat exchanger, comprising a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation last set with full or casticin is Oh, located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between adjacent rows and channels between the rows and body.The connection of the walls between the rows at the specified principle within the space covered by the housing, allows more compactly positioned heat-exchange surface, because it eliminates the division into zones. The elimination of the separation zone and, consequently, the elimination of peripheral cells between the heat exchange elements adjacent zones, the use of the vacated space to accommodate the additional heat transfer surfaces with regular (primary, current) cell allows to increase the efficiency of the heat exchanger, that is to get more performance with the same dimensions of the heat exchanger.The number of established channels to one more than the number of rows. The presence of multiple channels allows the use of a heat exchanger for performing heat exchange between the two, and a large number of different environments, circulating at the same time on their own is but the Union of the walls in two lines,
- Fig.2 shows the Association of the walls in the number of rows of more than two.In the space covered by the housing 1 (Fig.1), are heat-exchange elements, consisting of many walls. Each wall, for example 2, is connected with one end 3 with a connecting wall 4 and the other edge 5 - wall 6 located from it through an even number of intermediate walls 7 and 8, forming the rows of the joint walls 9, 10, 11, and between the rows and channels 12, 13 between the rows and the housing 1.In Fig. 2 wall 2 is connected with the following wall similar to that described for Fig 1. A wall, for example 14, is connected with one end 15 with the wall 16 located from it through an even number of intermediate walls 2 and 7, with the other edge 17 with the following wall 18 located from it through an even number of intermediate walls 19, 20, 21, 22, forming the rows of the joint walls 23, 24, 25, 26, the channels 27, 28, 29 between the rows and channels 30, 31 between the rows and the housing 1.The operation of the heat exchanger consider the example depicted in Fig 1.Coolant, for example, the heated gas flows into the channels 11 with one end of the heat exchanger, moving along it heats up reaches the exit channel from the other end, and exits the heat exchanger, while in the example of a heating gas, served in the channels 12 and 13 towards a heated, moving along it, giving through the walls 9, 10 of the heat of the heated gas moving in the channel 11, and out of it
The proposed heat exchanger allows to obtain the same volume greater productivity, as provided for tight layout that is more efficiently used internal space, to reduce the hydraulic resistance. A heat exchanger comprising a housing in which is located a heat-exchange element, consisting of a set of walls, the channels for the circulation of heat transfer media, a means for blocking the channels and education paths of circulation of the heat transfer media installed in channels with full and partial overlap of the latter, characterized in that each wall is connected at one end with the adjacent wall, and on the other side with the wall located from it through an even number of intermediate walls, or from one and the other side wall is connected with the following wall located from it through an even number of intermediate walls forming the rows of the joint walls, the channels between the rows and between the rows and the housing.
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: 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-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.
FIELD: power engineering, chemical industry.
SUBSTANCE: invention is designed for generation of steam. Proposed steam generator has cylindrical housing, coil and coaxial insert. Longitudinal ring channels between housing and coil and between insert and coil differ in section, first one exceeding section one, and are formed to provide maximum intensification of heat exchange, and insert is made sectional. Pitch of coil turns is made minimum possible to guarantee clearance between adjacent turns. Surfaces of housing and insert forming longitudinal ring channels can be made profiled. Housing of steam generator can be thermally insulated.
EFFECT: increased efficiency of heat exchange.
5 cl, 2 dwg
FIELD: chemical industry; reactors used for treatment of the viscous medium or to realization of the chemical reactions such as polymerization.
SUBSTANCE: the invention is pertaining to the reactor, which is used for treatment of the viscous medium or for realization of the chemical reactions such as polymerization. The reactor contains the tank and the circuit for circulation of the heat-carrying agent in the form of the fluid medium. At that the circuit contains at least one segment of the tube torque along the spiral-shaped guide. The circuit also contains the second segment of the tube torque along the spiral-shaped guide and arranged in parallel to the first segment between the distributor and the collector. The first and second segments are oriented concerning the same geometrical axis, mainly with the same radius of bending and are inserted one into other in such a manner that together they form essentially a cylindrical bunch. The circuit may have the second bunch formed, at least, with the help of one segment of the tube torque along the spiral-shaped guide arranged between the distributor and the collector and centered concerning the axis. At that the second bunch has essentially the cylindrical form with the radius smaller than the radius of the first bunch. The method includes the phase of alternation of the spiral-shaped segments of the tube, so that to form the essentially cylindrical bunch. The invention allows to increase efficiency of the heat feeding into the reaction medium.
EFFECT: the invention ensures the increased efficiency of the heat feeding into the reaction medium.
18 cl, 7 dwg
FIELD: domestic facilities.
SUBSTANCE: invention relates to combined heat and power supply plant for household use. Proposed domestic combined heat and power plant contains Stirling engine and water heater. Stirling engine is installed for heating by first burner supplied with fuel gas. Plant contains additionally intake gas duct passing from Stirling engine in contact with fuel gas intake in first burner preliminary heating of fuel gas delivered into first burner and then heating of water which is subsequently heated by water heater. Water heater is provided with second burner. Plant is designed so that outlet gas and gas from second burner form combined flow immediately after heating of water, and combined flow for heating of water is located higher from outlet gas relative to flow. Plant contains additionally cooler of Stirling engine arranged for heating water higher than outlet gas relative to direction of flow.
EFFECT: provision of effective heating of water, reduced cost of heating and provision of compact device.
2 cl, 4 dwg
SUBSTANCE: invention relates to energy industry and can be used in purge systems of the first and second circuits of a nuclear power plant. A heat exchanger comprises a vertical tube bundle, an upper support ring and a lower support ring inside a vertical case as well as a lower and an upper nipple of tube space heat carrier set on the case; the lower and upper tube bundle sections are connected to the respective supports and the latter are attached to the case. The lower and upper supports are made as vertical shells and attached to the case by the lower and upper end faces of the shells respectively, each nipple is set on the case opposite to the shell of the respective support and forms an annular chamber in respect to the case. Such design of the heat exchanger allows for moving the points of attaching the supports to the case away from the case welded seams joining the tube plates and the case for the required distance as well as reducing influence of the case seams on the supports to the allowable value.
EFFECT: reducing allowable influence of the case seams on the supports.
2 cl, 3 dwg
SUBSTANCE: in heat exchanger containing the housing with two coaxially located connection pipes, and at that, the latter together with the housing have transient sections in the form of diffusers, to each of which there attached is connection pipe connected to heat exchange tube bank, streamlined displacer is located axisymmetrically to the housing cavity and attached by means of cantilevers to the housing, and heat exchange tube bank connected by means of T-pieces to connection pipes is arranged in the housing in the form of twisted layers of tubes of streamlined displacer and equally spaced as per coils and layer-by-layer by means of planks attached to cantilevers.
EFFECT: design with proposed arrangement of tube bank will allow producing small-size heat exchanger meeting reliability, processibility, erection requirements at high specific heat stresses of the occupied volume of nuclear power plant.
SUBSTANCE: in heat exchanger comprising tubular vessel open on both end sides, where pipeline is installed intended for passage of the first coolant in it and when unrolled having length larger than length of vessel, external lining of vessel, at least in the area of the first end side there are holes, besides holes may be evenly distributed along side surface of vessel lining, share of holes area may reduce as distance increases from the first end side of vessel, besides as distance increases from the first end side, cross section of holes may reduce, and pipeline for the first coolant may be arranged in the form of spiral or meander. Specified heat exchanger may be used as condenser in refrigerating device.
EFFECT: increased efficiency of specified heat exchanger.
13 cl, 4 dwg
SUBSTANCE: invention relates to gas supply cryogenic system incorporated with extra-vehicular suit to be used outside spacecraft. Heat exchanger to gasify fluid oxygen comprises cylindrical casing (1), cover (13) with inlet 11 and outlet unions for heat carrier (moist air) and manifolds (14, 15) and coolant (oxygen to be gasified) unions (9, 10). Pipeline (5) feeds moist air onto heat exchanger bottom (8) whereon distributing cylindrical barrel (6) is arranged. Coils (2), (3), (4) with tubes that make spatial spiral are arranged concentrically on each other and on casing and secured in manifolds (14), (15).
EFFECT: compact heat exchanger-converter with sufficient capacity for preset time interval.
3 cl, 2 dwg