CN107270741A

CN107270741A - Multiple flow reduced pipe wound tube heat exchanger

Info

Publication number: CN107270741A
Application number: CN201710664032.5A
Authority: CN
Inventors: 吴金星; 王蕾; 田倩卉
Original assignee: Zhengzhou University
Current assignee: Luoyang Longhui Petrochemical Engineering Co ltd
Priority date: 2017-08-06
Filing date: 2017-08-06
Publication date: 2017-10-20
Anticipated expiration: 2037-08-06
Also published as: CN107270741B

Abstract

The present invention disclose a kind of multiple flow reduced pipe wound tube heat exchanger, including housing, bobbin carriage, tube sheet, core tin, around pipe, positioning strip, shell side inlet/outlet pipe, tube side inlet/outlet pipe, pass partition and hanging support, it is characterised in that：For the outer each layer of core cylinder around pipe, all alternately it is entwined around pipe by least two calibers, positioned with axial spacing of the layer between pipe with positioning strip, adjacent ectonexine is identical and winding direction is opposite around the helical angle of pipe, all two ends around pipe are divided into two tube banks according to pipe diameter size, two of its every one end restrain two regions for being arranged in same tube sheet, and pass partition is set on tube sheet and in bobbin carriage and two regions are separated, two tube banks of its every one end can be also arranged on two pieces of small tube sheets.The present invention realizes tube side a plurality of fluids and exchanged heat simultaneously with shell-side fluid, and being alternately arranged around pipe by reducing, increases the radial clearance between pipe, enhances the synthesis heat transfer effect of shell-side fluid.

Description

Multiple flow reduced pipe wound tube heat exchanger

Technical field

The present invention relates to shell-and-tube heat exchanger technical field, more particularly to a kind of multiple flow reduced pipe wound tube heat exchanger.

Background technology

Heat exchanger occupies critical role in the energy, power, chemical industry, oil and other many industrial productions.Changed around tubular type Hot device is the higher shell-and-tube heat exchanger of a kind of compact conformation, heat exchange efficiency, mainly including bobbin carriage, tube sheet, housing, core cylinder and around The main parts sizes such as pipe, core cylinder is fixed on the center of two ends tube sheet, and as the support of winding tube bank, multilayer is wrapped in around pipe Core cylinder outside.

Existing wound tube heat exchanger has a sub-thread stream and the major class of multiple flow two, but no matter which kind of, in wound tube heat exchanger All it is the heat exchanger tube using same caliber, is closely wound outside Guan Xin, whether axial spacing or horizontal spacing is all non- It is often small, so that cause the flow resistance of shell-side fluid larger, flow-disturbing effect and heat convection the effect reduction of shell-side fluid.Cause This, structure and arrangement in wound tube heat exchanger around pipe have much room for improvement.

The content of the invention

In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of multiple flow reduced pipe wound tube heat exchanger.

The technical solution adopted by the present invention is：Multiple flow reduced pipe wound tube heat exchanger includes housing, bobbin carriage, tube sheet, core Cylinder, around pipe, positioning strip, shell side inlet/outlet pipe, tube side inlet/outlet pipe, pass partition and hanging support, it is characterised in that：For core Each layer, around pipe, is all entwined, with axial spacing positioning strip of the layer between pipe cylinder by two kinds of replacing around pipe for caliber outside Positioning, adjacent ectonexine around the helical angle of pipe is identical and winding direction is on the contrary, all two ends around pipe are divided into according to pipe diameter size Two tube banks, two of its every one end restrain two regions for being arranged in same tube sheet, and on tube sheet and in bobbin carriage Pass partition is set and two regions are separated, two tube banks of its every one end can be also arranged on two pieces of small tube sheets, two The small tube sheet of block sets bobbin carriage and inlet/outlet pipe respectively, and bobbin carriage passes through end socket and is symmetrically fixed on the 45° angle position of end socket, two kinds of pipes Beam arrangement constitutes the bifilar stream of tube side.

It is described to be not limited only to around pipe using two kinds of calibers, also can be using a variety of calibers around pipe, the outer each layer of core cylinder is around pipe All it is entwined successively around pipe by a variety of calibers, being restrained around pipe as a tube side for each caliber is each to restrain difference Multiple regions of same tube sheet are arranged in, and pass partition is correspondingly arranged on tube sheet and in bobbin carriage and divides regional Open, so as to constitute tube side multiple flow.

It is described around pipe use a variety of calibers when, each caliber around pipe tube bank can use independent small tube sheet, Mei Ge little Tube sheet sets bobbin carriage and inlet/outlet pipe respectively, and bobbin carriage passes through end socket and is symmetrically fixed on the 45° angle position of end socket, so as to constitute pipe Journey multiple flow.

Depending on every kind of pipe diameter size around pipe is according to the process conditions of each tube side fluid under actual operating mode.

Compared with prior art, the invention has the advantages that：One be a variety of calibers around pipe using one piece of tube sheet Upper subregion arrangement or multiple small tube sheet arrangements, so as to constitute tube side fluid multiple flow, the tube side fluid for realizing various working is same When exchanged heat with a kind of shell-side fluid, alternative multiple common pipe heat exchangers improve the synthesis heat transfer effect of shell-side fluid；Two It is, around pipe successively canoe, to increase footpath of the ectonexine between pipe in the outer each layer of core cylinder around pipe all using a variety of calibers Axial gap to gap and with layer between pipe, is significantly reduced shell-side fluid flow resistance, strengthens the turbulent flow of shell-side fluid Degree and heat convection effect；Three be to use four tube plate structures, compared with double tubesheet structure, can greatly reduce tube sheet material consumption, Mitigate tube sheet weight and heat exchanger gross weight, save manufacturing cost.

Brief description of the drawings

Fig. 1 is the multiple flow reduced pipe wound tube heat exchanger of double tubesheet.

Accompanying drawing 1 is marked：1- pass partitions；2- bobbin carriages；3- paths are around pipe tube side outlet；4- shell side inlet tubes；5- housings； 6- tube sheets；7- paths are around pipe tube side inlet tube；The big footpaths of 8- are around pipe tube side inlet tube；9- shell-side outlet pipes；10- paths are around pipe；11- Big footpath is around pipe；12- hanging supports；13- cores cylinder；The big footpaths of 14- are around pipe tube side outlet.

Fig. 2 is the multiple flow reduced pipe wound tube heat exchanger of four tube sheets.

Accompanying drawing 2 is marked：1- shell side inlet tubes；2- paths export bobbin carriage around the tube side of pipe；3- end sockets；4- tube sheets；5- housings； 6- paths are around pipe；Tube side import bobbin carriage of the 7- paths around pipe；8- shell-side outlet pipes；Tube side import bobbin carriage of the big footpaths of 9- around pipe；10- Big footpath is around pipe；11- cores cylinder；12- hanging supports；The big footpaths of 13- export bobbin carriage around the tube side of pipe.

Embodiment

The assembling process of multiple flow reduced pipe wound tube heat exchanger is further illustrated below in conjunction with the accompanying drawings.

By taking the bifilar stream reduced pipe wound tube heat exchanger of double tubesheet as an example, first, core cylinder and the Tube-sheet Welding at two ends are consolidated Fixed, then, each layer is all wrapped in outside core cylinder successively by a variety of calibers around pipe around pipe according to the helical angle of design, then, institute Have and be divided into two tube banks according to pipe diameter size around the two ends of pipe, two tube banks of its one end respectively penetrate two of same tube sheet Area, two tube banks of its other end respectively penetrate the corresponding Liang Ge areas of another piece of tube sheet again.

For the bifilar stream reduced pipe wound tube heat exchanger of four tube sheets, first, by the circle of core cylinder tube sheet similar with two ends Frame welding is fixed, then, and each layer is all wrapped in core cylinder successively around pipe by a variety of calibers around pipe according to the helical angle of design Outside, then, all two ends around pipe are divided into two tube banks according to pipe diameter size, and two tube banks of its one end are each passed through circular frame Frame and penetrate two pieces of tube sheets, two tube banks of its other end respectively penetrate corresponding other two pieces of tube sheets again.

Positioned with axial spacing of the layer between pipe with positioning strip, positioning strip is weldingly fixed on bottom plate bar in advance, bottom plate Bar is axial arranged along core cylinder, is weldingly fixed on core cylinder；Adjacent ectonexine around pipe winding direction on the contrary, around the two ends of pipe and pipe Plate junction is fixed using first swollen rear weldering mode；The tube bank constituted around pipe of core cylinder and different tube diameters is integrally loaded into housing.

For the bifilar stream reduced pipe wound tube heat exchanger of double tubesheet, two ends tube sheet and case weld are fixed, at two ends One piece of pass partition is set respectively in bobbin carriage, the dividing plate both sides of bobbin carriage respectively correspond to welding tube side import and export adapter, by band every The two ends bobbin carriage of plate is connected by welding with tube sheet, and at two ends, the top center of bobbin carriage end socket sets the import and export of shell side Pipe.

For the bifilar stream reduced pipe wound tube heat exchanger of four tube sheets, the circular frame for restraining two ends is solid with 4-6 roots angle steel Cylinder inboard wall face is scheduled on, two piece tube sheets of the tube bank per one end dock two small bobbin carriages, and two small bobbin carriages are through end socket and weld solid The 45° angle position of end socket is scheduled on, is then connected end socket with housing butt welding, the top center of end socket sets shell side at two ends Inlet/outlet pipe.

When multiple flow reduced pipe wound tube heat exchanger works, shell side heat transferring medium is flowed into from shell-side fluid inlet tube, in shell Axially washed away in journey different tube diameters around pipe, while with around pipe carry out heat convection, finally from shell side fluid outlet pipe flow out；Pipe Two kinds of heat transferring mediums of journey separately flow into two kinds of calibers around the corresponding tube side fluid inlet tube of pipe, heat transferring medium passes through two kinds of pipes Footpath around pipe simultaneously with shell-side fluid heat-shift, finally respectively from the discharge of two tube side outlets.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims

1. the present invention disclose a kind of multiple flow reduced pipe wound tube heat exchanger, including housing, bobbin carriage, tube sheet, core cylinder, around pipe, calmly Position bar, shell side inlet/outlet pipe, tube side inlet/outlet pipe, pass partition and hanging support, it is characterised in that：For the outer each layer of core cylinder Around pipe, all it is entwined, is positioned with axial spacing of the layer between pipe with positioning strip by two kinds of replacing around pipe for caliber, it is adjacent interior Outer layer around the helical angle of pipe is identical and winding direction is on the contrary, all two ends around pipe are divided into two tube banks according to pipe diameter size, its Two per one end are restrained two regions for being arranged in same tube sheet, and pass partition are set on tube sheet and in bobbin carriage And separate two regions, two tube banks of its every one end can be also arranged on two pieces of small tube sheets, two pieces small tube sheet difference Bobbin carriage and inlet/outlet pipe are set, and bobbin carriage passes through end socket and is symmetrically fixed on the 45° angle position of end socket, and two kinds of tube bank arrangements are equal Constitute the bifilar stream of tube side.

2. multiple flow reduced pipe wound tube heat exchanger according to claim 1, it is characterised in that：It is described to be not limited only to around pipe , also can be using a variety of calibers around pipe using two kinds of calibers, the outer each layer of core cylinder is all twined successively around pipe by a variety of calibers around pipe Around into being restrained around pipe as a tube side for each caliber is each to restrain the multiple areas for being arranged in same tube sheet Domain, and on tube sheet and be correspondingly arranged pass partition in bobbin carriage and separate regional, so as to constitute tube side multiple flow.

3. multiple flow reduced pipe wound tube heat exchanger according to claim 1, it is characterised in that：It is described to use a variety of around pipe During caliber, being restrained around pipe for each caliber can use independent small tube sheet, and each small tube sheet sets bobbin carriage and import and export respectively Pipe, bobbin carriage passes through end socket and is symmetrically fixed on the 45° angle position of end socket, so as to constitute tube side multiple flow.