CN100447517C - Folding pressure-resistant multipass biaxial flow screw plate heat exchanger - Google Patents

Abstract

The present invention provides a detachable pressure-resistant multi-pass biaxial flow spiral plate heat exchanger which is composed of a heat transferring base plate, a central pipe, a spacing device, a sealing strip, a main partition plate, a partition plate among passes, a casing, a winding layer, sealing ends, a flange, a fluid inlet connection pipe and a fluid outlet connection pipe. The present invention is characterized in that a cold fluid and a hot fluid in a heat exchanger realize multi-pass reciprocation flow between the sealing ends at both ends; the two fluids mutually flows in the opposite direction; the same fluid in different passes has no radial flow; the winding layer is arranged outside heat-transfer cores; the spacing device is arranged in a fluid passage; when the heat exchange area needs to be large, the heat-transfer cores can be connected in series. The present invention reserves all advantages of a multi-turn heat exchanger and has the advantages that operating pressure can be obviously enhanced, the fluid flow speed is increased, the length of the heat exchanger is shortened, the consumption of the central pipes, the sealing ends, the flanges, the casings, etc., is reduced, the price ratio is high, and the development prospect is broad.

Description

A kind of detachable withstand voltage multipass double axial flow spiral-plate heat exchanger

Affiliated technical field

The invention belongs to the fluid thermal switching equipment.

Background technology

The spiral-plate heat exchanger patent since nineteen thirty implements since have the heat transfer coefficient height, with plate manage on behalf of another, compact conformation, manufacturing is easy, amount of machining is few, advantage such as with low cost, and significant progress has been arranged.But because also there is following shortcoming in it: operating pressure is not high, treating capacity is less, pick up and repair difficulty, and its application is restricted.Traditional spiral heat exchanger has four kinds (seeing table) by the flow direction of fluid.And by " multi-circle heat exchanger " of applicant invention, (ZL95215477.3), its hot and cold two fluids have all adopted axial flow, have the individual pen radial flow concurrently.For distinguishing mutually with traditional spiral heat exchanger, but called after IV type spiral heat exchanger.Implement proof through for many years: it has following advantage than shell and tube exchanger: 1, heat-transfer surface sheet material, manage on behalf of another with plate, and because of the sheet material of identical material is economized 40-50% than tubing, the high 5-10% of stock utilization makes the main material expense economize 50-60%; 2, processing technology is simple, no tube sheet, and accessory is few, the productivity ratio height, processing charges economize 40-50%; 3, the big 20-80% of heat transfer coefficient; Comprehensive above three advantages are when the exchanger heat original equipment cost of loading when identical is economized 60-70%; 4, the high 2-3 of compactedness times, floor space and spatial volume are all little; 5, be pure countercurrent flow, the two fluid tip temperature difference can be little of 3-4c ° during many series connection; 6, at the little 50-70% of the dirty body resistance of identical flow velocity, reduced running cost; 7; The few 70-80% of filling amount, startability is good; 8, do not have tube sheet, thermal stress is little; 9, can realize modularization production; 10, no matter heat transfer process has or not phase transformation, horizontal vertical installation all can.Compare with the conventional helical sheet heat exchanger, following advantage is arranged: 1. the outer elongated cylinder that forms, can improve operating pressure; 2. fluid resistance is low; 3. two kinds of fluids all can drain in the device, not material stock; 4. the separate unit treating capacity is big; 5. can realize modularization production, adopt way in parallel, that connect and also connect to satisfy the requirement of maximizing.

But, because multi-circle heat exchanger is an one way, its effective overflow section is long-pending bigger, makes flow rate of fluid low excessively (generally having only 0.1m/s), commercial metal roll bending width narrower (how less than 1.5m) in addition, so make the unit heat exchanger core shorter, when heat exchanger area is big, a plurality of unit heat exchanger cores are in series, make heat exchanger package long, so, use accessory many, process more numerous.Be subjected to the restriction of substrate thickness, further improve operating pressure and also have any problem.

Summary of the invention

Purpose of the present invention, be to provide a kind of detachable withstand voltage multipass double axial flow spiral-plate heat exchanger, it is by heat transfer substrate, central tube, the spacing device, strip of paper used for sealing, main dividing plate, the journey space bar, shell, winding layer, end socket, flange and fluid inlet and outlet adapter are formed, it is characterized in that: be provided with the heat exchange core in the enclosure, it is to be the center with the central tube with heat transfer plate, outwards roll into two not connected spiral roads, two ends need shutoff with strip of paper used for sealing by what fluid flowed, therein, cold and hot two fluids are respectively walked a runner, cold fluid is as walking the odd number circle, then hot body is walked the even number circle, the width of runner and the intensity of heat transfer substrate guarantee with the spacing device and strengthen, end socket place at the shell two ends, cold and hot two fluids separate by main dividing plate, make baffling between each comfortable journey of cold fluid and hot fluid by the journey space bar, the position of journey space bar is decision like this: when fluid does not have phase transformation, the long-pending size of effective overflow section between each journey is close, when fluid has phase transformation, should determine that the size of effective area of passage of each journey decides with the rate of flow of fluid of optimizing, like this, two fluids are counter-current flow at the heat exchange in-core, in the outside of heat exchange core winding layer are set.

Description of drawings

Below, in conjunction with the accompanying drawings, the invention will be further described.Fig. 1 is the Facad structure schematic diagram of detachable withstand voltage multipass double axial flow spiral-plate heat exchanger.Fig. 2 is the A-A view of Fig. 1.Fig. 3 is the B-B view of Fig. 1.Fig. 4 twines metal wire rod to improve the structural representation of compressive resistance for adopting.Fig. 5 is the structural representation of as a whole heat exchanger that two heat exchange cores are connected.Among the figure: 1-master's dividing plate, the 2-end socket, 3-journey space bar, the 4-fluid inlet and outlet is taken over, 5-flange, 6-shell, the 7-heat transfer substrate, 8-central tube, 9-I journey, 10-II journey, 11-III journey, the 12-strip of paper used for sealing, 13-winding layer, 14-spacing device, N-left end heat exchange core, M-right-hand member heat exchange core.What of journey, and, need comprehensively balance whether with the series connection of heat exchange core.

Embodiment

Select three Cheng Wei representative among Fig. 1, (being not limited thereto certainly).In shell 6, be provided with the heat exchange core, it is to be the center with heat transfer substrate 7 with central tube 8, outwards roll into two not connected spiral roads, two ends need shutoff with strip of paper used for sealing 12 by what fluid flowed, are example so that 18 circles to be set among the figure, and are labeled as 1# ∽ 18# circle, (numeral not shown in the figures) cold fluid (representing its flow direction with empty lead-in wire) is as walking the odd number circle, and then hot fluid (representing its flow direction with real lead-in wire) is walked the even number circle.1#.3#.5#.7# and 2#.4#.6#.8# is the I journey, 9#.11#.13# and 10#.12#.14# are the II journey, and 15#.17# and 16#.18# are the III journey.The position of journey space bar 3 is like this decisions: when heat exchanging fluid does not have phase transformation, should make long-pending the equating of effective overflow section of each journey as much as possible, and fluid should select overflow section long-pending when phase transformation is arranged with the rate of flow of fluid of optimizing.Main dividing plate 1 is divided into two parts up and down with the end socket 2 of heat exchanger, and the odd number circle on heat exchanger left end (referring to Fig. 1 and Fig. 2) top seals, and the even number circle then opens wide, and the bottom in contrast, and the odd number circle opens wide, and the even number circle then seals.The method of sealing is with strip of paper used for sealing 12 that the runner weldering is dead.The right-hand member of heat exchanger (referring to Fig. 1 and Fig. 3), the odd number circle on top opens wide, and the even number circle seals, and bottom odd number circle seals, the even number circle opens wide.Use this structure,, make two fluids make counter-current flow, and carry out heat exchange by heat transfer substrate 7 along passage separately again with the acting in conjunction of main dividing plate 1, journey space bar 3 and end socket 2.

Referring to Fig. 4, be the width that keeps runner and withstand voltage (when particularly the being subjected to external pressure) intensity that increases heat transfer substrate, be provided with spacing device 13 in runner, they are spacing column, spacing bar, spring and various fin, and the pattern of fin is a lot, be ripe auxiliary, need not to give unnecessary details.They and heat transfer substrate are compressed, preferably adopt soldering, with the heat transfer substrate seam on distance keeper and two sides.To increase withstand voltage (when particularly being subjected to external pressure) and the heat-transfer intensity of heat transfer substrate.For increasing the whole compressive resistance of heat exchange core, the measure that should take is: 1. being subjected to interior channel arrangement of pressing in outermost, 2. be provided with winding layer 14 in heat exchange core outside, its material has metal wire rod, glass or other synthetic fibers, metal wire rod is fixed with soldering or section solid welding, and glass and synthetic fibers will be fixed with high-strength plastic fat.Fig. 5 for about two heat exchange core N and M series connection be the structural representation of a heat exchanger, the flow direction of cold and hot two fluids has been indicated among the figure, need not to give unnecessary details.Two also available flanges of heat exchange core connect.

The present invention has kept all advantages of multi-circle heat exchanger, can effectively overcome it again and deposit Shortcoming, have very high cost performance, urgently have a DEVELOPMENT PROSPECT.

Claims (5)

1. detachable withstand voltage multipass double axial flow spiral-plate heat exchanger, be by heat transfer substrate, central tube, the spacing device, strip of paper used for sealing, main dividing plate, the journey space bar, shell, winding layer, end socket, flange and fluid inlet and outlet adapter are formed, it is characterized in that: be provided with the heat exchange core in the enclosure, it is to be the center with the central tube with heat transfer substrate, outwards roll into two not connected spiral roads, two ends need shutoff with strip of paper used for sealing by what fluid flowed, therein, cold and hot two fluids are respectively walked a runner, the width of runner and the intensity of heat transfer substrate guarantee with the spacing device and strengthen, end socket place at the shell two ends, cold and hot two fluids separate by main dividing plate, make baffling between each comfortable journey of cold fluid and hot fluid by the journey space bar, the position of journey space bar is decision like this: when fluid does not have phase transformation, the long-pending size of effective overflow section between each journey is close, when fluid has phase transformation, should determine that the long-pending size of effective overflow section of each journey decides with the rate of flow of fluid of optimizing, like this, two fluids are counter-current flow at the heat exchange in-core, in the outside of heat exchange core winding layer are set.

2. a detachable withstand voltage multipass double axial flow spiral-plate heat exchanger as claimed in claim 1 is characterized in that number of passes should be selected by technological requirement, and journey space bar number lacks 1 than number of passes.

3. a detachable withstand voltage multipass double axial flow spiral-plate heat exchanger as claimed in claim 1 is characterized in that the spacing device is spacing column, spacing bar, spring and various fin.

4. detachable withstand voltage multipass double axial flow spiral-plate heat exchanger as claimed in claim 1, it is characterized in that metal wire rod, glass or other synthetic fibers being arranged as the material of winding layer, metal wire rod is fixed with soldering or section solid welding, and glass and other synthetic fibers will be fixed with high-strength plastic fat.

5. detachable withstand voltage multipass double axial flow spiral-plate heat exchanger as claimed in claim 1 is characterized in that adopting a kind of in non-removable or dismountable two kinds of connecting modes that a plurality of heat exchange cores are together in series.

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