CN2555491Y

CN2555491Y - Special pipe heat exchanger

Info

Publication number: CN2555491Y
Application number: CN 02268744
Authority: CN
Inventors: 洪晓波
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-03
Filing date: 2002-08-03
Publication date: 2003-06-11
Anticipated expiration: 2012-08-03

Abstract

The utility model discloses a mechanical tube heat exchanger, which aims to improve heat transfer coefficient by the flow state of the medium in heat exchanger pipe of the heat exchanger. A tube plate (8) is arranged in a tube box (2); a plurality of mechanical tubes (4) are arranged on the tube plate (8); the two ends of the mechanical tubes (4) are provided with a straight section respectively, and the length is equal to that the width of the tube plate (8) adds to 3mm; others are processed to multi expanding and shrinkage circular section tube couplings, which are connected end to end. The utility model has the advantages of large heat transferring temperature difference, small thermal resistance of the ''boundary layer'' of heat transferring pipe inner wall and not easy scale formation of inner wall.

Description

The shape tube heat exchanger

Technical field

The utility model relates to a kind of heat exchanger, particularly a kind of shape tube heat exchanger.

Background technology

At present in the shell-and-tube heat exchanger field, because its heat exchanger tube is a smooth pipe, when fluid flows in this heat exchanger, internal face can form " boundary layer " and be laminar condition, flow velocity is low, make that the temperature on each cross section of pipe is inconsistent, have the bigger temperature difference, thereby reduced the inside and outside heat transfer temperature difference of pipe.In addition, because the flow velocity in " boundary layer " is low, be detained the fouling nucleus easily, quickened foulant and on inwall, deposited, generate incrustation scale, because the thermal conductivity factor of " boundary layer " and incrustation scale is low, thermal resistance is big, therefore greatly reduces the heat transfer coefficient of heat-transfer pipe, and tube wall incrustation also can produce underdeposit corrosion and increase flow resistance in addition, waste water pump electric power shortens equipment life.

The utility model content

The purpose of this utility model is the above-mentioned deficiency that overcomes prior art, propose a kind of flow regime, promptly produce the shape tube heat exchanger that whirlpool and attenuate " boundary layer " thickness improve heat transfer coefficient in the flow process by medium in the heat exchanger tube in the change heat exchanger.

The technical scheme that its technical problem that solves the utility model adopts is: the shape tube heat exchanger is to adopt tube sheet is housed in bobbin carriage, many shape tubes are housed on tube sheet, on tube sheet one end, pull bar is housed, deflection plate is housed on pull bar, the distance of deflection plate is regulated fixing by pull bar, the tube sheet of both sides and outward flange are connected to a fixed in bobbin carriage, have gasket seal between tube sheet and outward flange, flange end is welded with end socket outside, in end socket inside radius centre position, left side dividing plate is housed.Be provided with bearing in the bobbin carriage bottom, a kind of medium enters bobbin carriage from the tube side inlet, and by the dividing plate blocking-up, this medium enters the radius shape tube, from the downward radius shape tube of tail end bit stream, and by tube side outlet outflow; Another kind of medium enters bobbin carriage from the shell side inlet, returns multiple baffling at the shape tube outer surface by deflection plate, is flowed out by the shell side outlet.

Respectively there is one section straight section at the two ends of described shape tube, and its length equals the Tube Sheet of Heat Exchanger plate thickness and adds 30mm, and all the other are processed into a plurality of end to end expansions and shrink shape circle cross section tube coupling, L ₁＞L ₂, D＞D ₀

The beneficial effects of the utility model: the utility model is processed into shape tube to the smooth pipe of heat exchanger, and it is big to have the heat exchanger heat transfer temperature difference, and heat exchanger tube internal face " boundary layer " thermal resistance is little, the characteristics that inwall is less scaling.Because the acting in conjunction of These characteristics makes heat transfer coefficient improve greatly, can reach more than 1 times, under identical heat transfer condition, required heat transfer area significantly reduces; Less scaling in the heat exchanger tube in addition, the no strong throttling of flowing, the inefficient flow drag losses is little, saves power consumption, and prevents underdeposit corrosion.

Description of drawings

Fig. 1 is a general structure schematic diagram of the present utility model.

Fig. 2 is the shape tube structural representation of Fig. 1.

Among Fig. 1: 1. dividing plate, 2. bobbin carriage, 3. pull bar, 4. shape tube, 5. deflection plate, 6. pad, 7. end socket, 8. tube sheet, 9. bearing, 10. flange, 11. tube sides inlet, the outlet of 12. shell sides, the outlet of 13. tube sides, 14. shell sides inlet.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As shown in Figure 1 and Figure 2, the shape tube heat exchanger is to adopt tube sheet 8 is housed in bobbin carriage 2, many shape tubes 4 are housed on tube sheet 8, on tube sheet 8 one ends pull bar 3 is housed, deflection plate 5 is housed on pull bar 3, the distance of deflection plate 5 is regulated fixing by pull bar 3, the tube sheet 8 of both sides is connected to a fixed with outward flange 10 in bobbin carriage 2, between tube sheet 8 and outward flange 10, have pad 6 sealings, be welded with end socket 7, dividing plate 1 is housed in left side end socket 7 inside radius centre positions at outward flange 10 ends.Be provided with bearing 9 in bobbin carriage 2 bottoms.A kind of medium enters in the end socket 7 of left side by tube side inlet 11, and by dividing plate 1 blocking-up, this medium enters radius shape tube 4, from the downward radius shape tube 4 of tail end bit stream, and by tube side outlet 13 outflows; Another kind of medium enters bobbin carriage 2 from shell side inlet 14, returns multiple baffling at shape tube 4 outer surfaces by deflection plate 5, is flowed out by shell side outlet 12.Respectively there is one section straight section at the two ends of shape tube 4, and its length equals the Tube Sheet of Heat Exchanger plate thickness and adds 30mm, and all the other are processed into a plurality of end to end expansions and shrink shape circle cross section tube coupling, L ₁＞L ₂, D＞D ₀

Claims

1. shape tube heat exchanger, it is characterized in that: tube sheet (8) is housed in bobbin carriage (2), many shape tubes (4) are housed on tube sheet (8), on tube sheet (8) one ends, pull bar (3) is housed, deflection plate (5) is housed on pull bar (3), the tube sheet (8) of both sides is connected to a fixed with outward flange (10) in bobbin carriage (2), between tube sheet (8) and outward flange (10), has pad (6) sealing, be welded with end socket (7) at outward flange (10) end, in left side end socket (7) inside radius centre position dividing plate (1) is housed, be provided with bearing (9) in bobbin carriage (2) bottom, tube side inlet (11) and tube side outlet (13) is housed on left side end socket (7), shell side inlet (14) and shell side outlet (12) is housed on bobbin carriage (2).

2. a kind of shape tube heat exchanger according to claim 1 is characterized in that: respectively there is one section straight section at the two ends of shape tube (4), and its length equals the Tube Sheet of Heat Exchanger plate thickness and adds 30mm, and all the other are processed into a plurality of end to end expansions and shrink shape circle cross section tube coupling, L ₁＞L ₂, D＞D ₀