Detachable multi-stage heat exchanger

Abstract

The utility model discloses a detachable multi-stage heat exchanger which comprises a shell, and at least two sets of tube pass heat exchange assemblies perpendicular to the axial direction of the shell are arranged in the shell from top to bottom. Each group of tube pass heat exchange assembly comprises a first tube box, a second tube box, a tube bundle, a first tube plate, a second tube plate, a first tube box flange, a first shell flange, a second tube box flange and a second shell flange; the size of the first tube plate is larger than the inner size of the first tube box flange and the first shell flange, and the first tube plate is clamped and fixed through the first tube box flange and the first shell flange. The size of the second tube plate is smaller than the inner size of the second tube box flange and the inner size of the second shell flange, a plurality of fixing grooves are evenly formed in the surface of the outer edge of the second tube plate, fixing rings are installed in the fixing grooves, the fixing rings are fixedly connected with the second tube plate through external bolts, and the fixing rings are clamped and fixed through the second tube box flange and the second shell flange. According to the heat exchanger, multiple sets of heat exchange can be conducted at the same time, and each set of tube pass heat exchange assembly is detachable.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely relates to a detachable multistage heat exchanger. BACKGROUND

[0002] At present, the most common heat exchanger is the tube heat exchanger, and the tube heat exchanger includes a shell and a tube bundle arranged axially inside the shell, and two kinds of fluids with different temperatures in the tube and shell exchange heat. In some strong acid and alkali heat exchange conditions, the heat exchanger tube bundle needs to be designed to be detachable to facilitate cleaning and maintenance. At present, the tube plate of the large detachable heat exchanger is usually fixed by bolts, and the bolts are located in the tube, which causes the bolts to be corroded by the corrosive medium, and if the bolts are loosened due to corrosion, it may cause medium leakage and safety accidents. In addition, the tube heat exchanger currently available has a tube bundle in the shell, which is usually arranged in one group, i.e. only the medium in one group of heat exchange tube bundles can be exchanged, and when maintenance is needed, the heat exchange must be stopped, which affects the production progress. Therefore, a detachable multistage heat exchanger is proposed. SUMMARY

[0003] To solve the above technical problems, the utility model provides a detachable multistage heat exchanger.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of:

[0005] A detachable multistage heat exchanger is placed vertically and includes a shell, at least two groups of tube heat exchange assemblies perpendicular to the axial direction of the shell are arranged in the shell from top to bottom, and both ends of the tube heat exchange assemblies extend out of the shell.

[0006] Each group of tube heat exchange assemblies includes a first tube box, a second tube box, a tube bundle arranged between the first tube box and the second tube box, a first tube plate and a second tube plate fixed at both ends of the tube bundle, and a first flange group and a second flange group for fixing the first tube plate and the second tube plate respectively; the first flange group includes a first tube box flange and a first shell flange, the second flange group includes a second tube box flange and a second shell flange, the first shell flange and the second shell flange are symmetrically fixed on the two side walls of the shell, and the first tube box flange and the second tube box flange are fixed on the side of the first tube box and the second tube box close to the shell respectively.

[0007] The size of the first tube plate is greater than the inner sizes of the first tube box flange and the first shell flange, and the first tube plate is clamped and fixed through the first tube box flange and the first shell flange; the size of the second tube plate is smaller than the inner sizes of the second tube box flange and the second shell flange, and the outer edge surface of the second tube plate is uniformly provided with a plurality of fixing grooves, a fixing ring protruding out of the fixing grooves is installed in the fixing grooves, the fixing ring is fixedly connected with the second tube plate through external bolts, and one end of the fixing ring protruding out of the fixing grooves is clamped and fixed through the second tube box flange and the second shell flange.

[0008] Preferably, first sealing gaskets are arranged between the first tube plate and the first tube box flanges and the first shell flanges on both sides of the first tube plate respectively; and second sealing gaskets are arranged between the fixing ring and the second tube box flanges and the second shell flanges on both sides of the fixing ring respectively.

[0009] Preferably, the outer edges of the first tube plate are provided with sealing channels for placing the first sealing gaskets.

[0010] Preferably, the first tube box flanges and the first shell flanges are provided with first bosses on the opposite side surfaces for pressing the outer edges of the first tube plate; and the second tube box flanges and the second shell flanges are provided with second bosses on the opposite side surfaces for pressing the outer end surfaces of the fixing ring.

[0011] Preferably, the first tube box flanges and the first shell flanges and the second tube box flanges and the second shell flanges are connected through bolts.

[0012] Preferably, the two ends of the shell are respectively provided with a shell side medium inlet and a shell side medium outlet which are in communication with the interior of the shell.

[0013] Preferably, the first tube box and the second tube box of each group of tube side heat exchange assemblies are respectively provided with a tube side medium inlet and a tube side medium outlet which are in communication with the interiors of the tube boxes.

[0014] Preferably, the first tube box and the second tube box of each group of tube side heat exchange assemblies are provided with a purging port which is in communication with the interiors of the tube boxes.

[0015] Preferably, the installation directions of the multiple groups of tube side heat exchange assemblies are the same.

[0016] Preferably, the installation directions of the multiple groups of tube side heat exchange assemblies are different, and the multiple groups of tube side heat exchange assemblies are cross arranged from top to bottom.

[0017] The utility model discloses the beneficial effects are:

[0018] (1) The detachable multi-stage heat exchanger is characterized in that at least two groups of tube-side heat exchange assemblies perpendicular to the axial direction of the shell are arranged in the shell from top to bottom, and multiple groups of heat exchange can be simultaneously performed.

[0019] (2) The detachable multi-stage heat exchanger is characterized in that the tube-side heat exchange assembly is of a detachable structure, facilitating cleaning, maintenance and replacement of the tube bundle; and the small tube plate is fixed with the fixing ring by external bolts, which not only is more firmly fixed, but also can effectively avoid corrosion of the bolts by the corrosive medium, resulting in loosening of the bolts and leakage of the medium. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0021] Figure 1 is the internal structure schematic view of the heat exchanger of the embodiment 1 of the present application;

[0022] Figure 2 is the structure schematic view of the tube-side heat exchange assembly of the embodiment 1 of the present application;

[0023] Figure 3 is Figure 2 the structure enlarged view of A in the figure;

[0024] Figure 4 is the structure schematic view of the first tube plate of the embodiment 1 of the present application;

[0025] Figure 5 is Figure 2 the structure enlarged view of B in the figure;

[0026] Figure 6 is the top view of the heat exchanger of the embodiment 2 of the present application.

[0027] The figure is marked: 1, shell; 101, shell side medium inlet; 102, shell side medium outlet; 2, tube side heat exchange assembly; 201, first tube box; 202, second tube box; 203, tube bundle; 204, first tube plate; 205, second tube plate; 206, first tube box flange; 207, first shell flange; 208, second tube box flange; 209, second shell flange; 210, connecting tube box; 211, first sealing gasket; 212, sealing channel; 213, first boss; 214, fixing ring; 215, external bolt; 216, second sealing gasket; 217, second boss; 218, tube side medium inlet; 219, tube side medium outlet; 220, exhaust port. DETAILED DESCRIPTION

[0028] The utility model provides a detachable multistage heat exchanger, in order to make the purpose, technical scheme and effect of the utility model more clear, explicit, the following to the utility model further detailed explanation. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0029] In the description of the utility model, it is understood that the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it can not be understood as a limitation on the utility model.

[0030] The utility model will be described in detail below in combination with the drawings.

[0031] Embodiment 1

[0032] Referring to Figure 1 , the embodiment provides a detachable multistage heat exchanger, which is vertically placed, comprising a shell 1, at least two groups of tube side heat exchange assemblies 2 perpendicular to the axial direction of the shell 1 are arranged in the shell 1 from top to bottom, and both ends of the tube side heat exchange assemblies 2 extend out of the shell 1, and mounting holes for mounting the tube side heat exchange assemblies 2 are arranged on the side wall of the shell 1. Wherein, the shell side medium in the shell 1 flows along the axial direction of the shell 1, the flow direction of the tube side medium in the tube side heat exchange assemblies 2 is perpendicular to the flow direction of the shell side medium, and the shell side medium flowing in the shell 1 can simultaneously exchange heat with the tube side medium flowing in the multiple groups of tube side heat exchange assemblies 2.

[0033] In the embodiment, referring to Figure 2Each group of tube-pass heat exchange assembly 2 includes a first tube box 201, a second tube box 202, a tube bundle 203 arranged between the first tube box 201 and the second tube box 202, a first tube plate 204 and a second tube plate 205 fixed at both ends of the tube bundle 203, and a first tube box flange 206 and a first shell flange 207 for fixing the first tube plate 204, a second tube box flange 208 and a second shell flange 209 for the second tube plate 205. The first tube box flange 206 and the second tube box flange 208 are respectively fixed on the side of the first tube box 201 and the second tube box 202 close to the shell 1, and can be fixed by welding. The first shell flange 207 and the second shell flange 209 are respectively fixed on the two side walls of the shell 1 by the connecting tube box 210, and can be fixed in the mounting hole area of the shell 1 by welding. The tube bundle 203, the first tube plate 204 and the second tube plate 205 are fixed by expansion and welding, which effectively avoids gap corrosion.

[0034] In this embodiment, with reference to Figure 3 and Figure 4 The size of the first tube plate 204 is greater than the inner size of the first tube box flange 206 and the first shell flange 207, the first tube plate 204 is clamped and fixed by the first tube box flange 206 and the first shell flange 207, and the first tube box flange 206 and the first shell flange 207 are fixed by bolts.

[0035] In addition, in order to ensure the sealing performance of the first tube plate 204 and the first tube box flange 206 and the first shell flange 207 on both sides of the first tube plate 204, first sealing gaskets 211 are arranged between the first tube plate 204 and the first tube box flange 206 and the first shell flange 207 on both sides of the first tube plate 204, and sealing channels 212 for placing the first sealing gaskets 211 are formed on both sides of the outer edge of the first tube plate 204.

[0036] In addition, in order to ensure that the first tube box flange 206 and the first shell flange 207 can firmly fix the first tube plate 204, first bosses 213 are arranged on the opposite side surfaces of the first tube box flange 206 and the first shell flange 207, which are used to press the parts of the outer edges of the first tube plate 204 close to the first tube box flange 206 and the first shell flange 207, that is, the sealing surfaces of the first tube box flange 206 and the first shell flange 207 are provided with the first bosses 213; at the same time, the first bosses 213 can also press the first sealing gaskets 211, that is, the first sealing gaskets 211 are arranged in the sealing cavities formed by the sealing channels 212 on both sides of the outer edge of the first tube plate 204 and the sealing surfaces of the first tube box flange 206 or the first shell flange 207 and the first bosses 213 of the first tube box flange 206 or the first shell flange 207, which further improves the sealing performance.

[0037] In this embodiment, with reference toFigure 5 The second tube plate 205 is sleeved in the second tube plate flange 208 and the second shell flange 209, the outer edge surface of the second tube plate 205 is provided with a plurality of fixing grooves which are uniformly distributed around the outer edge of the second tube plate 205, a fixing ring 214 with one end protruding out of the fixing groove is installed in the fixing groove, the fixing ring 214 is provided with a T-shaped bolt hole in the center, the fixing ring 214 is fixedly connected with the second tube plate 205 through the external hexagonal bolt 215, and the end of the fixing ring 214 protruding out of the fixing groove is clamped and fixed through the second tube plate flange 208 and the second shell flange 209, and the second tube plate flange 208 and the second shell flange 209 are fixed through bolts.

[0038] In addition, in order to ensure the sealing performance of the second tube plate 205 and the fixing ring 214 and the second tube plate flange 208 and the second shell flange 209 on both sides thereof, the second sealing gasket 216 is arranged between the fixing ring 214 and the second tube plate flange 208 and the second shell flange 209 on both sides thereof.

[0039] In addition, in order to ensure that the second tube plate flange 208 and the second shell flange 209 can firmly fix the second tube plate 205, the second tube plate flange 208 and the second shell flange 209 are provided with a second boss 217 on the opposite side surface thereof, which is used for pressing the outer end surface of the fixing ring 214 on both sides thereof close to the second tube plate flange 208 and the second shell flange 209, that is, the sealing surface of the second tube plate flange 208 and the second shell flange 209 is provided with the second boss 217; meanwhile, the second boss 217 can also press the second sealing gasket 216, that is, the second sealing gasket 216 is arranged in the sealing cavity formed by the sealing surface of the second tube plate flange 208 or the second shell flange 209 and the second boss 217 of the second tube plate flange 208 or the second shell flange 209 on both sides of the fixing ring 214, so as to further improve the sealing performance.

[0040] In the embodiment, the two ends of the shell 1 are respectively provided with a shell medium inlet 101 and a shell medium outlet 102 which are in communication with the inside of the shell 1, the first tube plate 201 and the second tube plate 202 of each group of tube-side heat exchange assemblies 2 are respectively provided with a tube-side medium inlet 218 and a tube-side medium outlet 219 which are in communication with the inside of the tube plate, and the first tube plate 201 and the second tube plate 202 of each group of tube-side heat exchange assemblies 2 are also respectively provided with a venting port 220 which is in communication with the inside of the tube plate, and the venting port 220 is arranged at the bottom of the first tube plate 201 and the second tube plate 202.

[0041] In the embodiment, the cross sections of the first tube box 201, the second tube box 202, the first tube plate 204, the second tube plate 205, the first tube box flange 206, the first shell flange 207, the second tube box flange 208 and the second shell flange 209 are rectangular; in other embodiments, circular, square, polygonal or combinations thereof can also be used.

[0042] In the embodiment, the installation directions of the plurality of groups of tube-side heat exchange assemblies 2 are the same, i.e., the installation directions of the plurality of groups of tube-side heat exchange assemblies 2 are all parallel to a certain radial direction of the shell 1.

[0043] The installation process of the detachable multi-stage heat exchanger of the embodiment is as follows:

[0044] (1) Installation of the first tube box and the first tube plate: the two ends of the tube bundle are fixedly connected with the first tube plate and the second tube plate, then the first sealing gasket close to the shell is placed against the sealing surface of the first shell flange, then the tube bundle is installed into the shell from the side of the first tube box, after the tube bundle is installed, the second sealing gasket on the other side is installed, then the first tube box is installed, and the first tube box flange and the first shell flange are fixed by using bolts.

[0045] (2) Installation of the second tube box and the second tube plate: the second sealing gasket close to the shell is placed against the sealing surface of the second shell flange, then the fixing ring is installed on the second tube plate and fixed by using the hexagonal outside bolt, then the second sealing gasket on the other side is installed, then the second tube box is installed, and the second tube box flange and the second shell flange are fixed by using bolts.

[0046] The disassembly process of the detachable multi-stage heat exchanger of the embodiment is opposite to the above installation process, i.e., the second tube box and the fixing ring installed on the second tube plate are disassembled first, then the first tube box is disassembled, and after the first tube box and the second tube box are disassembled, the tube bundle is pulled out from the side of the first tube box, and the tube bundle is cleaned, maintained or repaired.

[0047] Embodiment 2

[0048] With reference to Figure 6 The difference between the embodiment and embodiment 1 is that in the embodiment, the installation directions of the plurality of groups of tube-side heat exchange assemblies 2 are different, and the plurality of groups of tube-side heat exchange assemblies 2 are arranged in a cross manner from top to bottom, i.e., the plurality of groups of tube-side heat exchange assemblies 2 are arranged along different radial directions of the shell 1.

[0049] In the embodiment, the installation manner can reduce the non-uniform deformation of the shell side wall caused by the welding of the first and second shell flanges of the plurality of groups of tube-side heat exchange assemblies.

[0050] It should be noted that the parts not mentioned in the utility model can be realized by using or referring to the existing technology.

[0051] Of course, the above description is not a limitation of the utility model, the utility model is not limited to the above examples, the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A detachable multi-stage heat exchanger, which is vertically placed, characterized in that, The application relates to a heat exchange device, which comprises a shell (1) and a plurality of groups of tube-pass heat exchange assemblies (2) arranged in the shell (1) from top to bottom and extending out of the shell (1) at both ends. Each group of tube-pass heat exchange assemblies (2) comprises a first tube box (201), a second tube box (202), a tube bundle (203) arranged between the first tube box (201) and the second tube box (202), a first tube plate (204) and a second tube plate (205) fixed at both ends of the tube bundle (203), and a first tube box flange (206) and a first shell flange (207) for fixing the first tube plate (204), and a second tube box flange (208) and a second shell flange (209) for fixing the second tube plate (205); the first tube box flange (206) and the second tube box flange (208) are respectively fixed on the side of the first tube box (201) and the second tube box (202) close to the shell, and the first shell flange (207) and the second shell flange (209) are symmetrically fixed on the two side walls of the shell (1). The size of the first tube plate (204) is greater than the inner size of the first tube box flange (206) and the first shell flange (207), and the first tube plate (204) is clamped and fixed by the first tube box flange (206) and the first shell flange (207); the size of the second tube plate (205) is smaller than the inner size of the second tube box flange (208) and the second shell flange (209), and the outer edge surface of the second tube plate (205) is uniformly provided with a plurality of fixing grooves, a fixing ring (214) protruding out of the fixing groove is arranged in the fixing groove, the fixing ring (214) is fixedly connected with the second tube plate (205) through external bolts (215), and one end of the fixing ring (214) protruding out of the fixing groove is clamped and fixed by the second tube box flange (208) and the second shell flange (209).

2. A dismountable multi-stage heat exchanger according to claim 1, characterized in that First sealing gaskets (211) are respectively arranged between the first tube plate (204) and the first tube box flange (206) and the first shell flange (207) on the two sides of the first tube plate (204); and second sealing gaskets (216) are respectively arranged between the fixing ring (214) and the second tube box flange (208) and the second shell flange (209) on the two sides of the fixing ring (214).

3. A dismountable multi-stage heat exchanger according to claim 2, characterized in that Sealing channels (212) for placing the first sealing gaskets (211) are formed by the structure on both sides of the outer edge of the first tube plate (204).

4. A dismountable multi-stage heat exchanger according to claim 1, characterized in that First bosses (213) for pressing the outer edge of the first tube plate (204) are arranged on the opposite side surfaces of the first tube box flange (206) and the first shell flange (207); and second bosses (217) for pressing the outer end surface of the fixing ring (214) are arranged on the opposite side surfaces of the second tube box flange (208) and the second shell flange (209).

5. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The first tube box flange (206) and the first shell flange (207) and the second tube box flange (208) and the second shell flange (209) are connected through bolts.

6. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The shell (1) is provided with a shell medium inlet (101) and a shell medium outlet (102) respectively at two ends of the shell (1) and connected with the interior of the shell (1).

7. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The first tube box (201) and the second tube box (202) of each group of tube side heat exchange assemblies (2) are respectively provided with a tube side medium inlet (218) and a tube side medium outlet (219) connected with the interior of the tube box.

8. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The first tube box (201) and the second tube box (202) of each group of tube side heat exchange assemblies (2) are respectively provided with a tube side medium inlet (218) and a tube side medium outlet (219) connected with the interior of the tube box.

9. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The installation directions of the plurality of groups of tube side heat exchange assemblies (2) are the same.

10. A dismountable multi-stage heat exchanger according to claim 1, characterized in that The installation directions of the plurality of groups of tube side heat exchange assemblies (2) are different, and the plurality of groups of tube side heat exchange assemblies (2) are arranged in cross from top to bottom.

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