Heat exchanger and machine provided with such heat exchanger
SUBSTANCE: heat exchanger comprising: a central portion having a plurality of channels for a fluid and a tank, open on one side and formed by a top wall, opposing parallel walls and end walls, an open tank side adapted for welding to the end surface of the central portion of the heat exchanger at the inner side end of the side walls of the tank, is welded to the central portion of the heat exchanger formed by a smooth arc surface protruding inwardly of the tank. Furthermore, the invention also relates to the machine having a heat exchanger.
EFFECT: increasing filter efficiency.
6 cl, 3 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to corrosionproof fluid flow conducting parts and equipment comprising one or more such parts. Equipment component comprises first fluid corrosionproof flow conducting section that comprises first corrosionproof material and second fluid flow conducting section that comprises second material. First and second sections are, directly or indirectly, have their ends welded together in solid state to make integral fluid flow conducting part. Invention covers also the method of replacing at least one fluid flow conducting equipment part that proposes replacement component comprising first fluid flow conducting section that includes first material and second fluid flow conducting section that includes second material. Second material is, in fact, identical to that of equipment section whereat spare part is to be mounted. First and second sections are, directly or indirectly, have their ends welded together in solid state to make integral fluid flow conducting part. Space part is secured to equipment by flush butt welding of second material of second space part with material being, in fact identical, to that of equipment attachment section.
EFFECT: higher efficiency due to replacement with parts that feature improved corrosion resistance properties.
101 cl, 2 ex, 4 tbl, 14 dwg
FIELD: technological processes.
SUBSTANCE: invention may be used to make welded header blocks, used, for instance in cooling systems of power transformer vessels. Panels are made with necks in the form of collars. Flat panels are assembled into blocks with their pressing to header pipe, and neck of each panel is welded to it. Neighboring panels are assembled with gap between edges of collars and are welded to header pipe by means of annular overlapping seam with provision of simultaneous fusion of two neighboring collars. After all annular seams are completed, edges of panel block neck collars are welded to header pipe by two longitudinal seams.
EFFECT: invention provides for increased efficiency and production of reliable welded seams without burn-throughs, and also makes it possible to reduce number of annular seams in narrow space between panels and to facilitate monitoring of welding process and visual inspection of overall appearance of welded seams.
SUBSTANCE: air cooling unit comprises heat exchanging sections with heat exchange tubes, gas supply and removal headers, and unit support structure. Connection of heat exchange tubes with header is made via the horizontal and inclined manifolds, in the horizontal manifold holes are made for connection with the heat exchange tubes, in the surface of contact with the header a X-groove is made for welding, in the inclined manifold the holes are made for connection with the heat exchange tubes, bevelling of the side surface is made towards the surface of contact with the header, on the surface of contact with the header from side opposite to the bevel a V-groove is made for welding, the horizontal manifold is welded to the header, on the horizontal manifold from the place of contact between the manifold and header a rectangular cavity is made, angle between the manifolds and base at the header axis is 35°±30', in the manifold holes the ends of the heat exchange tubes are inserted and welded. Bevel of the side surface of the inclined manifold and rectangular cavity of the horizontal manifold are made on the condition to ensure distance between manifolds on the header surface at least 20 mm.
EFFECT: simplified manufacturing and assemblage.
FIELD: machine building.
SUBSTANCE: air cooling unit is suggested, it contains heat exchange sections with distribution chambers and nozzles, shutters, fan with electric drive, diffuser, at that the heat exchange sections are made out of connected in pairs corrugated plates making packages of tight channels for the cooling flow and cooled product flow passage, at that along the package of tight channels for cooling air passage at least one or more rows of the transverse planks is rigidly secured, they are connected by plate with the diffuser, so the air flow supplied by the fan is divided to two equal parts ensuring more uniform air distribution, and more intensive heat exchange.
EFFECT: reduced operation expenses, dimensions and required space for the unit field installation, increased operation reliability.
FIELD: oil and gas industry.
SUBSTANCE: invention relates to methods of primary oil refining and can be used for energy-saving oil fractioning in oil processing industry. The method involves separation of raw oil into two parts and heating of the first part to the temperature that differs from temperature of electric desalting and dehydration by not more than 10C, due to cooling of petroleum fractions to transportation temperature. The second part of raw oil is separated into flows as per the number of separated kerosene-diesel and residual fractions, in the composition of which there is a fraction with controlled temperature and the rest fractions, heated and mixed with the first heated oil part so that the heated raw oil with electric desalting and dehydration temperature is obtained. With that, one of the flows of the second part of raw oil is heated with the pre-cooled fraction with controlled temperature, and the rest flows of raw oil are heated to the temperature that differs from electric desalting and dehydration temperature by not more than 10C with the rest pre-cooled fractions. The rest separated fractions cooled down to transportation temperature are obtained. After the fraction with controlled temperature is cooled down with raw oil, it is additionally cooled down to transportation temperature with an external cooling agent. The heated raw oil is subject to electric desalting and dehydration so that treated oil is obtained, which is separated into flows as per the number of separated kerosene-diesel and residual fractions, heated with the latter and supplied for primary refining. With that, one of the flows of the treated oil is heated at least with some part of the fraction with controlled temperature, and the rest flows of treated oil are heated with the rest fractions so that the rest pre-cooled fractions are obtained.
EFFECT: heat recovery of a petroleum fraction, reduction of heat losses and cooling of separated fractions to their transportation temperature.
2 cl, 1 dwg, 1 ex
SUBSTANCE: heat exchanger contains pipeline made in the form of wall of a through cavity with outer surface and end sections. Also it contains external heat transfer elements attached to one end section. Wall of the through cavity of another end section is made in the form of an enveloping element of a through opening that is formed in the wall of the room. At that external heat transfer elements are made in the form of facing elements of the wall of the room being made from steel plates, pipes, channel sections, angle elements or bars. End sections are fastened to each other by metal fixing device.
EFFECT: improving efficiency of heat transfer from heat exchanger to ambient air enlarging functional capabilities of heat exchanger and the number of hardware.
SUBSTANCE: pipeline is made in the form of wall of a through cavity with outer surface and end sections. Besides external heat transfer elements are made and attached to one end section. Wall of a through cavity of another end section is made in the form of an enveloping element of a through opening, which is made in the wall of the room. At that external heat transfer elements are made in the form of facing elements of the wall of the room being made from steel plates, pipes, channel sections, angle elements or bars. End sections are fastened to each other by metal fixing device.
EFFECT: improving efficiency of heat transfer from heat exchanger to ambient air enlarging functional capabilities of heat exchanger and the number of hardware.
SUBSTANCE: pipeline is made by manufacturing a wall of a through cavity with outer surface, end sections and an intermediate section that is arranged between end sections. Besides, external heat transfer elements are made, which are attached to end sections. The wall of the through cavity of the intermediate section is made in the form of an enveloping element of a through opening, which is made in the wall of the room.
EFFECT: enlarging the number of hardware; improving heat transfer efficiency from heat exchanger to ambient air.
SUBSTANCE: heat exchanger includes a pipeline made in the form of a wall of a through cavity with outer surface, end sections and an intermediate section that is arranged between end sections. Besides, it includes external heat transfer elements that are attached to end sections. Wall of through cavity of the intermediate section is made in the form of an enveloping element of a through opening that is formed in the wall of the room.
EFFECT: enlarging the number of hardware, namely, creating a new site; improving heat transfer efficiency from heat exchanger to ambient air.
SUBSTANCE: heat exchange system with a heat exchanger comprises inlet and outlet surfaces. To exchange heat between a transportation liquid medium and coolant flowing through the heat exchanger in the working condition, the transportation liquid medium supply is provided through a supply surface of the heat exchange system and the inlet surface to the heat exchanger, bringing in contact with the heat exchanger and again discharge via an outlet surface from the heat exchanger. According to the invention, the heat exchange system for removal of dirt comprises an automatic cleaning system.
EFFECT: automatic system of heat exchanger filter treatment in process of operation, elimination of heat exchange system outage.
12 cl, 6 dwg
FIELD: instrument making.
SUBSTANCE: in a heat exchanger comprising fixed heat exchange pipes connected to supply and drain nozzles, pipes are installed in pipe walls closed with covers with holes for connection with supply and drain nozzles accordingly, at the same time between each pipe wall and the appropriate cover there are additional matrices with through holes, forming inner channels that connect at least one pair of pipes to each other and also to holes matching with holes in covers.
EFFECT: development of a split structure of a heat exchanger of coil type, lower labour intensiveness of heat exchanger production with simultaneous provision of the possibility for mechanical cleaning of inner surfaces of heat exchange pipes from scale and suspended matter deposits, higher reliability and service life.
25 cl, 1 dwg
SUBSTANCE: invention relates to a method of transferring heat to a liquid mixture containing at least one (meth)acrylic monomer selected from a group comprising acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, glycidyl acrylate, glycidyl methacrylate, methyl acrylate, methyl methacrylate, n-butyl acrylate, isobutyl acrylate, isobutyl methacrylate, n-butyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, ethyl acrylate, ethyl methacrylate, 2-ethylhexyl acrylate and 2-ethylhexyl methacrylate, through an indirect heat exchanger on whose primary side a fluid heat carrier flows and on whose secondary side simultaneously flows said liquid mixture containing at least one (meth)acrylic monomer, wherein the liquid mixture containing at least one (meth)acrylic monomer, in order to reduce contamination, additionally contains at least one active compound other than (meth)acrylic monomers which is selected from a group consisting of tertiary amines, salts formed from a tertiary amine and a Bransted acid, and quaternary ammonium compounds, under the condition that none of the tertiary and quaternary nitrogen atoms in the at least one active compound bears a phenyl group but at least some of said tertiary and quaternary nitrogen atoms bear at least one alkyl group.
EFFECT: improved method.
15 cl, 16 ex
FIELD: heat-exchanging apparatus.
SUBSTANCE: heat exchanger is made of composite material and has intermediate part made of a fire-resistance composite material provided with passages for fluid circulation. The intermediate part is interposed between the part made of fire-resistance composite material, which forms a heat shield, and part made of composite material, which forms the bearing structure for the heat exchanger. The parts of the heat exchanger are interconnected by soldering.
EFFECT: enhanced efficiency and reliability.
FIELD: heat exchanger, applicable in cooling cycle.
SUBSTANCE: the heat exchanger has a pair of headers, whose longitudinal axes are in parallel to each other, a great number of tubes separated from one another along the longitudinal axes of the headers, coiled fins passing between the adjacent pairs of tubes. Each fin has a length passing in parallel with the parallel branches of the adjacent tubes, and a lateral width passing crosswise at least of two parallel branches of the adjacent tubes. Each tube is bent for determination at least of two parallel tube branches so that the working medium flows in succession through at least two parallel chambers from one header to the other. Each tube has a flattened section with a larger dimension and a smaller dimension, and the larger dimensions of each parallel branch lie in one plane that passes crosswise the longitudinal axes of the fins. Each fin has a great number of alternating crosspieces and elongated separators located between the parallel branches of the adjacent tubes for separating the width of each fin into a great number of discrete elements. Each fin element corresponds to one parallel branch of each adjacent tube and passes along it. Each fin has a height passing from one tube to the adjacent tube in parallel with the longitudinal axes of the headers, and the larger dimension of the tubes does not exceed this height of the fin. The larger dimension of each tube does not exceed 8.128 mm or 12.7 mm, and the smaller dimension does not exceed 1.524 mm or 2.54 mm. the separators in the fins may be slots or slotted holes that do not require any removal of the fin material at their forming in the fin. The separators and the crosspieces have length passing in parallel with the fin length, and the relation of the lengths of the separators and the lengths of the crosspieces may be within 200 to 600. At least one of the tubes may have a great number of holes and has a hydraulic diameter within 0.381 to 1.016 mm.
EFFECT: perfect supercritical cooling of working medium in the transcritical cooling cycle.
FIELD: mechanical engineering.
SUBSTANCE: heat exchanger comprises housing with lids, grates that receive solid fuel members provided with central passage, and igniting unit mounted in one of the grates. The meshes of the grate provided with the igniting unit have a hollow whose diameter is less than the outer diameter and depth is larger than one forth of the diameter of the inner passage. The hollows are connected with the space of the igniter by means of passages made in the grid.
EFFECT: enhanced efficiency.
FIELD: heating; engines and pumps.
SUBSTANCE: in both embodiments instrument contains fans for outer intertubular cooling medium feeding, mainly it is air, body implemented as sectionalised with at least two heat exchanging sections. Every section includes pressure vessel for intratubal medium, mainly it is gas, implemented as multiserial single-pass fascicle of finned tubes, connected with chamber of gas input and output and through them with collectors of gas feeding and withdrawal. Finned tubes are located in fascicle with offset in every row concerning tubes in adjoining rows, and rows of tubes are separated from each other by dissociating elements implemented as plicate plates with alternating on plate length salient and concave areas, which form support point for tubes of fascicle height adjoining rows. Configuration of plicate dissociating element accepted such as diametric line of top concave areas are located with respect to plane which passes through appropriate diametric lines of bottom concaves areas of element, in the high-altitude range of amounts, defined by specified relationship. According to the first version of implementation instrument gas air cooling is outfitted by aero-clear sun screen of sloping plates, located with orientation of its longitudinal axes in the line of east-west azimuthal deflection from this direction in plane in the range from -35° till +35°.
EFFECT: increasing of heat exchange efficiency; increasing calorific power of instrument and rising of instrument service life.
22 cl, 27 dwg
FIELD: engines and pumps, heating.
SUBSTANCE: heat-and-cold feed system heat pumping plant (HCPP) comprises heat pumping equipment, heat accumulation system, system to collect low-potential heat power of the Earth soil surface layers and system to recover secondary heat sources representing ventilation heat emissions. Note here that the heat pump evaporators are connected, along the heat carrier motion, in the hydraulic circuit of the said low-potential heat collection system directly ahead of the soil heat exchangers. The system to recover secondary heat sources representing ventilation heat emissions is connected in the hydraulic circuit of the said low-potential heat collection system behind the said soil heat exchangers and ahead of the heat pump evaporators. Note here that the hydraulic circuit of the said low-potential heat collection system incorporates cold feed or conditioning system connected in parallel therein, while the system to recover secondary heat sources can be use a cooling tower to equalise the system heat balance. Note also that HCPP can perform cold feed from both heat pumps and cold accumulated in soil. Mind that the heat accumulation system comprises two temperature stages of accumulation, i.e. low-temperature one fed from heat pumps and high-temperatures one fed from power sources.
EFFECT: higher efficiency.
SUBSTANCE: invention deals with design of heat exchanger devices and is to be implemented to provide for heat media heating and gasification such as in cryogenic plants, steam boilers etc. To provide for the technical result solution a recuperative heat exchanger is proposed consisting of a housing with heat media inlet and outlet nipples and grates with heat exchanger elements mounted onto them arranged in concentric circles. One of the grates represents the bottom while the other - the lid. The heat exchanger elements arranged coaxial relative to one another are mounted on the grates in such a way that some of them are rigidly attached to the bottom, with their ends free, while the others are attached to the lid, with the ends equally free. The heat exchanger elements free ends are directed towards one another so that to collectively form a single circular duct for the heating heat medium transport from the heat exchanger centre towards the periphery. The heat exchanger elements are represented by cylindrical shells each consisting of three rigidly interconnected cylinders in one of them there having been ducts arranged for the heated heat medium circulation. There is a cowling mounted on the bottom-positioned distribution device.
EFFECT: extension of the device functionalities combined with performance improvement.
3 cl, 3 dwg
FIELD: heating, fuels.
SUBSTANCE: invention relates to heat engineering, particularly, to heating various-purpose buildings, namely, to the designs of water-heating systems and those designed to stabilise and recovery of heat exchange. The proposed water-heating system comprises hear lines that deliver heat carrier from direct main pipeline to riser pipes arranged in party walls and from floor party walls to the inlet of every heat exchanger mounted at the centre of window stool zone. The outlet of each heat exchanger is connected to the inlet of the next floor heat exchanger. The last floor heat exchanger outlet communicates with the pipe that deliver heat carrier to return pipe of the main pipeline that features top arrangement and shut-off valves. Every riser pipe and heat exchanger allows cleaning them of deposits and corrosion. To this end, the riser pipes mounted in party walls are connected by flexible hoses at their centres and jointed between vertical and horizontal lines. Note that divided heat exchangers feature plugged holes aligned with section channels at the top of two-channel sections or on top of the upper header. The invention covers also the versions of the heating system, versions of the method of cleaning of deposits and corrosion, heat exchanger versions and indoor temperature control method.
EFFECT: longer life of heating system, easier servicing, improved indoor temperature control.
20 cl, 7 ex, 27 dwg