(57) Abstract:The invention is intended for use in the field of heat, and it can be used in air heating systems, air conditioning, ventilation. The invention contains the path of the coolant channels of the duct cross-direction Teploobmennik environments and surface heat transfer, and the path of the coolant is made in the form of whole boxes formed by the cross section of the flat walls, two of which, opposite are performed symmetrically relative to each other through a slit with a fillet around the perimeter, through which space over the exterior surfaces of the walls communicated to each other via a closed perimeter elements forming a heat exchange surface, is made of sheet metal, mounted with a tight fit their extremities in these rounded slit, moreover, the ends of the closed ends of the elements around the perimeter of the junction in the slits made with closed outside edges, protruding above the outer surface of the walls, a closed element in the region of one of its rounded surfaces are made with nachlese wall. The invention allows to significantly improve the efficiency of operation of the heat exchanger. 2 Il. The invention relates to the field of power engineering, and specifically to the boiler building for heating the air leaving gases of boilers, and can be used in air heating systems, ventilation, air conditioning, furnace aggregates industry, transport and stationary objects.Known heater comprising a heat exchange surface in the form of straight pipes, reported its ends with tubular boards and installed in the flue of the boiler, while the gases are moving inside the pipe, and the outside air in the cross-direction (see the book. The development of marine steam generators: a Textbook authors Dementiev K. S. and other HP: Shipbuilding, 1986, S. 178-184). The disadvantages of this heater are:
the relatively large mass through the use of pipes with wall thickness more than 1 mm;
- low coefficient of compactness, f50 square m/cubic m;
- the complexity of the replacement tubular heat exchange surface during repairs;
- the difficulty of clearing of sediments with gas and especially with the air of the parties.Una) during operation.Known heater comprising a gas duct and the duct cross-direction Teploobmennik environments and the heat exchange surface in the form of profiled sheets or plates welded around the perimeter and collected in bags, with the formation of specialized channels for the movement of gas and air (see ibid., pp. 185-189). This heater, as the closest, selected as a prototype of the proposed solution. The disadvantages of the prototype are:
the relatively large mass of the heater through the use of heat transfer surface with a material thickness of about 1 mm;
- the complexity and the relatively greater complexity of manufacturing due to the great length of welds;
the difficulty or impossibility of replacing the worn part of the surface heat transfer and the need for full and time-consuming replacement in cross-corrosion damage;
- low efficiency of use of corrosion-resistant coating of heat transfer surface, damaged in the area of the welds during fabrication;
the difficulty of cleaning the profile of the channels in areas of narrowing or t-shaped joints, often accompanied by a decrease in the efficiency of utilization.The challenge which seeks the invention is to remedy these disadvantages: reduction in weight and complexity of the manufacturing process, the possibility of a simplified replace partially or completely the surface of heat transfer, including without factory repair, elimination of welds and the ability to effectively use anti-corrosion coatings, nepodrazhaemyj in the manufacture and replacement of heat transfer surface, simplifying cleanup operations, which increases the efficiency of operation of the heater.This object is achieved in that in the known heater comprising a path of the coolant and the channels of the duct cross-direction Teploobmennik environments and surface heat transfer, in contrast, in the inventive path of the coolant is made in the form of whole boxes formed by the cross section of the flat walls, two of which, oppositely located, have performed symmetrically relative to each other through a slit with a fillet around the perimeter, through which space over the exterior surfaces of the walls communicated with each other through closed on perimete fit their extremities in these rounded slit, moreover, the ends of the closed ends of the elements around the perimeter of the junction in the slits made with a curved outside edges, protruding above the outer surface of the walls, a closed element in the region of one of the rounding its surface is made with overlapping walls formed at the junction of the fit of this rounded surface of the element to the surface of its side wall, and themselves through the cracks of the walls placed with a uniform pitch on their surface.The claimed combination of restrictive and distinctive characteristics provides a simplification of manufacture and repair, and persistence povrezhdaemosti corrosion-resistant coating on the surface of the heat exchange in the manufacture, maintenance and cleaning, increases reliability, and improves operating efficiency.Box-like shape of the heat path from the heat exchange surface in the form of a flat walls closed around the perimeter of elements provides, firstly, the ability of the composition of the heater from a number of series and(or) installed in parallel and joined to each other end surfaces of the flat wall sections to increase the surface of heat exchange with the cost accounting Teploobmennik coolant and air access for inspection, clean or repair if the blockage or damage to the heat exchange surface.Performing heat exchange surface in the form of flat surfaces, closed on the perimeter of the slit overlap, allows, firstly, as preparations to use thin-walled (0.5 mm) material with corrosion-resistant coating and eliminate damage to the coating at curves in the region of the fillet slot flat wall, and secondly, it is easy to remove the damaged surface heat transfer through a lamina of material from the surface cracks.Supply wall heat tract symmetric end-to-end slits allows, firstly, to easily make the surface of the heat transfer inside the heat tract on either side of the slot walls with the formation of the same amount of protrusion on the outer surface of the walls, secondly, to make the injection of heat transfer surface on both sides relative to the surface cracks using the opposite set of wedges with a maximum size corresponding to the size and shape of the slit, i.e., effectively, in the third place, it is easy to perform sealing of the duct due to the pre-connection lapped surface-side heat transfer heat is a need for corrosion-resistant coating on the heat exchange surface, improve the reliability and efficiency of operation of the heater.The claimed technical solution is illustrated by the following illustrations. In Fig. 1 presents a diagram of the heater, and Fig.2 - the same, in axonometric view.The heater has the following device. Two pairs of flat walls 1 and 2 are welded to each other along the adjacent end surfaces form a box-like shape tract fluid, for example gas. A flat wall 2 provided with a through slit 3, rounded edges and are made with a uniform pitch on a flat surface. The heat exchange surface contains 4 sheets, folded in the form of a slit in a closed heat exchange elements 5 with the formation of the channels 6. Each channel 6 of the element 5 is formed by connecting lap 7 sheets 4. Tip element 5 is pressed into the slits 3 flared 8 on their outer contour on the outer surface of the flat walls 2.The heater used in the following way. A supply of air heated in the air heater, perform one of the sides of the walls 2 (the direction of flow of cold air shown in the diagram on the right side of the arrows) into the channels 6. Passing through kanelopoulos side wall 2. Supply of hot gases carried out as shown in the diagram on the underside of the box bounded by the walls 1 and 2. Washing the external cold surface of the sheet 4, the gases are cooled and discharged from the upper part of the boxes, as shown by the arrows.Proof of air moving in the channels 6 in the cavity tract fluid connection is provided by lap 7 sheets 4 element 5. Due to excessive air pressure in the channel 6 against the pressure of the gas in the path of the coolant is provided by the seal 7. This also contributes to the reduction of rigidity of the material due to the small thickness of the sheets 4, which does not exceed 0.5 mm Using the flange 8 on the outer surface of the wall 2, is obtained by using compression is the opposite set of wedges (not shown), prevents the bypass of air between channels 6 and the surface of the slits 3 in the cavity of the path of the coolant.The lack of hard links (welding, brazing, etc.,) between the United overlapping sheets 4 and between the elements 5 and the surface of the slits 3 in the wall 2 provides the possibility of thermal expansion of the heat transfer elements 5 without distorting their shape and with the exception of thermal stresses in the elements Coca air heater from deposits on the outer and inner surfaces of the channels 6 may be carried out by blasting the surface with jets of steam during operation from stationary Barabanenkov, mounted on carrier Cabinet construction with flanged inlet-exhaust gas and air (not shown), and by mechanical cleaning in misexplanation period when removing the heater from the specified bearing structure (not shown) in the transverse direction relative to the flow of air and gases with the implementation of the inspection and detection of heat transfer surface. Repair heat exchange surface when replacing a damaged heat exchanger elements 5 is carried out by lamina thin sheets 4 (not shown) and their removal and subsequent replacement. This ensures the safety of anti-corrosion coating on the surface of the sheet material used for the heater.Thus, the decreasing weight of the air heater through the use of thin-walled heat exchange surface, reducing the complexity of the manufacturing process by eliminating the welding joints of structural elements with surface heat transfer, ease of replacement or repair of heat transfer surface that does not require complicated equipment or high qualification of the work force, high efficiency corrosion-resistant coating of heat transfer surface, not powerhead operation while maintaining high thermal efficiency of the heater. The heater containing the path of the coolant and the channels of the duct cross-direction Teploobmennik environments and surface heat transfer, characterized in that the path of the coolant is made in the form of whole boxes formed by the cross section of the flat walls, two of which, opposite are performed symmetrically relative to each other through a slit with a fillet around the perimeter, through which space over the exterior surfaces of the walls communicated to each other via a closed perimeter elements forming a heat exchange surface, is made of sheet metal, mounted with a tight fit their extremities in these rounded slit, moreover, the ends of the closed ends of the elements around the perimeter of the junction in the slits made with a curved outside edges, protruding above the outer surface of the walls, a closed element in the region of one of the rounding its surface is made with overlapping walls formed at the junction of the fit of this rounded surface of the element to the surface of its side wall, and themselves through the cracks of the walls placed with a uniform pitch on their surface.
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.
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.
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.
FIELD: heat transfer equipment, particularly used in furnaces characterized by descending combustion product movement, namely in power installations such as exhaust gas heat utilizing devices.
SUBSTANCE: heat-exchanger comprises heat-exchanging pipe bundle provided with hexahedral connection parts formed at pipe ends and defining tube and annular spaces. The heat-exchanger has annular shape in top view and has inner window adapted to convey solid particles, namely combustion products. Connection parts of the pipes are welded with each other. Annular spaces defined around the pipes are closed with separate plates made as elongated hexahedrons tangentially adjoining paired pipes and welded with each other. One heat-exchanging pipe is removed from both heat-exchanger sides relatively vertical axis thereof. Inlet and outlet connection pipes communicated with annular space for heat transfer agent receiving are welded to free hexahedral cells formed after heat-exchanging pipes removal. Cells from opposite sides of connection pipes are closed with caps.
EFFECT: increased heat-exchanger strength and heat-transfer efficiency, elimination of complicated structural units, possibility to adapt heat-exchanger for burners characterized by descending combustion product movement.
FIELD: heat-exchangers, particularly submersible ones.
SUBSTANCE: heat-exchanger comprises body perforated with orifices located at cylindrical inlet chamber height, tube plate, tube bundle arranged so that coolant is directed transversely to the tube bundle. Heat exchanger also has displacers and spacing grid. Hexahedral collector is formed on tube bundle at inlet chamber height so that the collector is coaxial to the body. The hexahedral collector perimeter is free of tubes. Radial channels extend from collector corners to tube bindle perimeter. The radial channels are also free from tubes. Displacers are installed in spacing grid below inlet chamber.
EFFECT: possibility of uniform coolant flow over each heat-exchanging tube, provision of equal temperature characteristics at each tube outlet and reduced vibration of tubes in tube bundle.
FIELD: heat exchange equipment, namely used in oil processing, chemical, gas, oil and power production industry branches.
SUBSTANCE: heat exchanger includes shell having bundle of heat exchanging tubes, inlet and outlet branch pipes for draining fluid from space between tubes, collector chamber connected with one end of shell and having branch pipes for inlet and outlet of tube fluid, collector tube wall and lengthwise heat insulated partitions mounted along axis of collector chamber and axis of shell. Lengthwise partition of shell is provided with sealing members in the form of packs of longitudinal bands arranged between partition and inner surface of shell symmetrically relative to lengthwise partition. In places where cross ends of sealing longitudinal bands adjoin to tube wall that is in trihedral angles, sealing units in the form of packs of bands or petal- or lug-shaped plates are mounted symmetrically relative to lengthwise heat insulated partition. Said packs are closely secured to tube wall; each band or plate is arranged in such a way that it adjoins to longitudinal bands and has camber to side of sealing longitudinal bands.
EFFECT: possibility for providing labyrinth seal of trihedral angle between inner surface of shell, sealing longitudinal bands and tube wall.
4 cl, 16 dwg
FIELD: heat power engineering.
SUBSTANCE: multi-sectional heat exchanger comprises sections made of at least two rectilinear pipes whose ends are provided with collectors which are interconnected in series through a tube bend. Each section is made of a set of pipes with piping collectors. The sections are parallel one to the other. The area of the cross-section of the bend tube is no less than that of the collector pipes.
EFFECT: reduced hydraulic drag and enhanced efficiency of heat exchanger.
SUBSTANCE: invention can be used for heating liquid and gas in technological processes of oil refining, petrochemical, gas and other industries. Heat exchanger contains a casing, pipe walls and grates with heat exchange pipes. Between transverse walls damping baffles that contain rectangular disk packages mounted between rows of pipes parallel to each other in a transverse plane exchanger, and rectangular disk packages of rectangular cross section mounted between rows of pipes parallel to each other in another heat exchanger transverse plane are installed.
EFFECT: increase of endurance.
3 cl, 7 dwg
SUBSTANCE: vortex apparatus comprises casing wit upper and lower covers, the lower one making a condensate collector, gas inlet/outlet and condensate outlet branch pipes, partitions, vortex pipe, initial compressed gas flow rate control device and condensate-separation units. Aforesaid vortex pipe includes a cold flow and hot flow pipes. Initial compressed gas flow rate control device incorporates a screw-type tightening device (STD) with adjusting washer furnished with a cross-piece with stem arranged in the STD membrane hole. The said stem passes via the cold flow pipe and through the gland in the upper cover out from the apparatus and is furnished with the rotation drive. The condensate-separation units comprise pipe laid between the said partitions, two pairs of crosswise slots arranged opposite to each other on the hot flow pipe at the distance of (1.25 to 1.45) d, where d is the pipe ID, from the STD edge and shifted relative to each other by 90°. Note that the said slots are arranged along the axis at the distance of (0.15 to 0.25) d. The circular chamber outlet channels, inside the hot flow pipe, are terminates at the gap between the casing wall and thin-wall cylinder. The hot flow pipe outlet is furnished with a nozzle and thin-wall cylinder is provided with confuser-diffuser element making an injector.
EFFECT: control over initial compressed gas flow rate by external effects and higher efficiency of condensation-separation processes.
1 cl, 4 dwg
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