Double-temperature heat exchange device

Abstract

The utility model discloses a dual-temperature heat exchange device, which relates to the technical field of heat exchange devices and comprises a first heat exchange module, a second heat exchange module, a shell and a connecting block, the first heat exchange module and the second heat exchange module are both located in the shell, and each of the first heat exchange module and the second heat exchange module comprises an end tube plate, a middle tube plate and a heat exchange tube bundle; the end tube plates and the middle tube plates are connected with the shell so as to form a closed space for containing a shell pass medium of the first heat exchange module or the second heat exchange module to flow. The middle tube plates of the first heat exchange module and the second heat exchange module are adjacent; the connecting block is positioned on a middle tube plate of the first heat exchange module and the second heat exchange module; the two ends of the heat exchange tube bundle are connected to the end tube plates and the connecting blocks correspondingly. Runner holes corresponding to the heat exchange tubes of the first heat exchange module and the second heat exchange module are formed in the connecting block so as to communicate the tube pass of the first heat exchange module with the tube pass of the second heat exchange module; the structure is simple, use is convenient, and the installation space can be saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange devices, and specifically relates to a dual-temperature heat exchange device. Background Art

[0002] At present, the recovery of CO2 gas from brewery fermentation is mainly carried out through CO2 gas compressors. In the CO2 booster fan system, the gas temperature will increase after boosting. Therefore, a cooling system needs to be installed at the compressor exhaust port to cool down the CO2 in the system. In order to adapt to the overall production line, the CO2 gas needs to be cooled to about 15°C.

[0003] The commonly used cooling methods are water cooling or using refrigerants for heat exchange, but if water cooling is used entirely, the water cooling temperature requirement is high, and if refrigerants are used entirely, the cost will be high. Therefore, a more ideal situation is to use secondary cooling, that is, water cooling is performed first and then refrigerant cooling; in the prior art, the secondary cooling method is to use two heat exchange devices, and the use of two heat exchange devices requires intermediate connecting devices, such as pipe boxes and connecting pipes, which leads to increased construction costs, increased equipment installation space, and losses in and out of the intermediate connecting devices. Utility Model Content

[0004] The utility model aims at the deficiencies in the prior art and provides a dual-temperature heat exchange device to save equipment installation space.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A dual-temperature heat exchange device comprises: a first heat exchange module, a second heat exchange module, a shell and a connecting block; the first heat exchange module and the second heat exchange module are both located in the shell and are respectively close to the two end header boxes of the shell; the first heat exchange module and the second heat exchange module both comprise an end tube sheet, an intermediate tube sheet and a heat exchange tube bundle; the end tube sheet and the intermediate tube sheet are both connected to the shell to form a closed space for accommodating the flow of shell-side medium of the first heat exchange module or the second heat exchange module; the intermediate tube sheets of the first heat exchange module and the second heat exchange module are adjacent; the connecting block is located on the intermediate tube sheets of the first heat exchange module and the second heat exchange module; the two ends of each heat exchange tube of the heat exchange tube bundle are detachably connected to the end tube sheet and the connecting block respectively; the connecting block is provided with flow channel holes corresponding to the heat exchange tubes of the first heat exchange module and the second heat exchange module to connect the tube sides of the first heat exchange module and the second heat exchange module.

[0007] Optionally, the end tube sheet is close to an end header box of the shell; the end header box of the shell can be disassembled, and after disassembly, the end tube sheet can be exposed;

[0008] The heat exchange tube is detachably connected to the end tube plate through a connecting flange arranged at its head; the flow channel hole is in the shape of an "I"; the heat exchange tube of the first heat exchange module rests on the stepped surface at one end of the flow channel hole, and the heat exchange tube of the second heat exchange module rests on the stepped surface at the other end of the flow channel hole.

[0009] Optionally, the intermediate tube plate is provided with first penetration holes corresponding to the heat exchange tubes one by one; the intermediate tube plate is also provided with a sealing groove coaxially sleeved with the first penetration holes; a sealing ring is sleeved on the circumference of the heat exchange tube; when the heat exchange tube is installed in place, the sealing ring is placed in the sealing groove.

[0010] Optionally, the first heat exchange module and the second heat exchange module both further include a baffle; the baffle is provided with a second through hole for accommodating the heat exchange pipe to pass through; the hole wall of the second through hole is serrated.

[0011] Optionally, an air inlet is provided on one end head box of the shell, and an air outlet and a drain pipe are provided on the other end head box; the drain pipe is connected to a first drain valve and a second drain valve; after the first drain valve or the second drain valve is opened independently, the drain pipe can be connected.

[0012] Optionally, a liquid level gauge is provided at the end of the shell close to the drain pipe; the liquid level gauge is electrically connected to the first drain valve.

[0013] Optionally, the first heat exchange module and the second heat exchange module are distributed vertically, and the shell-side media of the first heat exchange module and the second heat exchange module are different.

[0014] Optionally, the shell-side medium of the first heat exchange module is water, and the shell-side medium of the second heat exchange module is Freon.

[0015] The beneficial effects of the utility model are:

[0016] A first heat exchange module and a second heat exchange module are arranged in the shell, and a connecting block is arranged between the first heat exchange module and the second heat exchange module. The connecting block is provided with a flow channel hole, so that the pipe paths of the first heat exchange module and the second heat exchange module are connected, avoiding the use of too many connecting devices and saving equipment installation space; the heat exchange tube is detachably connected to the end tube plate and the connecting block, so that each heat exchange tube of the first heat exchange module and the second heat exchange module can be replaced independently, which is convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an enlarged structural schematic diagram of the first heat exchange module of the utility model;

[0019] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the local A in the middle;

[0020] Figure 4 It is a schematic diagram of the connection structure between the intermediate tube sheet and the heat exchange tube.

[0021] Markings in the figure are: 1 is the first heat exchange module, 2 is the second heat exchange module, 3 is the shell, 31 is the end header box, 32 is the air inlet, 33 is the air outlet, 34 is the drain pipe, 35 is the first drain valve, 36 is the second drain valve, 4 is the connecting block, 41 is the flow channel hole, 5 is the end tube sheet, 6 is the middle tube sheet, 61 is the first penetration hole, 62 is the sealing groove, 63 is the sealing ring, 7 is the heat exchange tube bundle, 71 is the heat exchange tube, 72 is the connecting flange, 8 is the baffle, 81 is the second penetration hole, and 9 is the liquid level meter. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings.

[0023] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. used in the utility model are only for the convenience of description and are not used to limit the scope of implementation of the utility model. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the utility model without substantially changing the technical content.

[0024] like Figure 1 As shown, a dual-temperature heat exchange device is provided, comprising: a first heat exchange module 1, a second heat exchange module 2, a shell 3 and a connecting block 4; the first heat exchange module 1 and the second heat exchange module 2 are both located in the shell 3 and are respectively close to two end header boxes 31 of the shell 3; the first heat exchange module 1 and the second heat exchange module 2 are distributed in a straight line; the first heat exchange module 1 and the second heat exchange module 2 both include an end tube sheet 5, an intermediate tube sheet 6 and a heat exchange tube bundle 7; the end tube sheet 5 and the intermediate tube sheet 6 are both connected to the shell 3 to form a closed space for accommodating the flow of the shell-side medium of the first heat exchange module 1 or the second heat exchange module 2, that is, a closed space is formed between the first heat exchange module 1 and the shell 3 to accommodate the flow of the shell-side medium of the first heat exchange module 1, and another closed space is formed between the second heat exchange module 2 and the shell 3 to accommodate the flow of the shell-side medium of the second heat exchange module 2; the shell 3 wraps the first heat exchange module 1 and the second heat exchange module 2; the shell inlet and outlet of the first heat exchange module 1 and the second heat exchange module 2 both extend to the outside of the shell 3.

[0025] The intermediate tube sheets 6 of the first heat exchange module 1 and the second heat exchange module 2 are adjacent to each other, that is, the end tube sheet 5 of the first heat exchange module 1 is close to one end header box 31 of the shell 3, and the end tube sheet 5 of the second heat exchange module 2 is close to the other end header box 31 of the shell 3; the connecting block 4 is located on the intermediate tube sheet 6 of the first heat exchange module 1 and the second heat exchange module 2; the two ends of the heat exchange tube bundle 7 are respectively connected to the end tube sheet 5 and the connecting block 4; the connecting block 4 is provided with flow channel holes 41 corresponding to the heat exchange tube bundles 7 of the first heat exchange module 1 and the second heat exchange module 2 to connect the tube paths of the first heat exchange module 1 and the second heat exchange module 2; the setting of the connecting block 4 can connect the tube paths of the first heat exchange module 1 and the second heat exchange module 2 with each other. The tube paths of the first heat exchange module 1 and the second heat exchange module 2 are CO2 gas that needs to be cooled. Through the connecting block 4, the first heat exchange module 1 and the second heat exchange module 2 are connected, which can avoid the use of auxiliary intermediate connecting devices such as connecting pipes. The overall structure is simple, easy to use and saves installation space.

[0026] More specifically, an air inlet 32 ​​is provided at one end header box 31 of the shell 3, and an air outlet 33 and a drain pipe 34 are provided at the other end header box 31; the first heat exchange module 1 is close to the air inlet 32, and the second heat exchange module 2 is close to the air outlet 33; the drain pipe 34 is provided with a first drain valve 35 and a second drain valve 36; after the first drain valve 35 or the second drain valve 36 is opened independently, the drain pipe 34 can be conductive; a liquid level gauge 9 is provided at the end of the shell 3 close to the drain pipe 34; the liquid level gauge 9 is electrically connected to the first drain valve 35. Specifically, the position of the liquid level gauge 9 is located on the side of the shell 3 close to the air outlet 33. After the liquid level gauge 9 is electrically connected to the first drain valve 35, the first drain valve 35 can be automatically opened and closed after the liquid level gauge 9 reaches the set value. The specific control method can refer to the existing technology, so as to realize the discharge of liquid components entrained in the CO2 gas after the CO2 gas is cooled.

[0027] More specifically, the first heat exchange module 1 and the second heat exchange module 2 are distributed up and down, and the shell-side media of the first heat exchange module 1 and the second heat exchange module 2 are different; the shell-side medium of the first heat exchange module 1 is water, and the shell-side medium of the second heat exchange module 2 is Freon, that is, the first heat exchange module 1 can cool the CO2 gas to about 40°C, and the second heat exchange module 2 can cool the CO2 gas to about 15°C; the cooling medium of the second heat exchange module 2 of the present application can have two sources, that is, source one is recycled Freon, and source two is newly added Freon from the outside.

[0028] Specifically, the end header box 31 of the shell 3 can be disassembled, and after disassembly, the end tube sheet 5 can be exposed; the heat exchange tube bundle 7 includes a plurality of heat exchange tubes 71; both ends of the heat exchange tube 71 are detachably connected to the end tube sheet 5 and the connecting block 4, so that the heat exchange tube 71 can be independently detached from the first heat exchange module 1 or the second heat exchange module 2; each of the heat exchange tubes 71 can be independently detached from the shell 3, so that the heat exchange tube 71 can be easily replaced.

[0029] Specifically, a connecting flange 72 is provided at the head of the heat exchange tube 71, and the heat exchange tube 71 is detachably connected to the end tube sheet 5 by using the connecting flange 72 and fasteners; the flow channel hole 41 is in the shape of an "I", that is, both ends of the flow channel hole 41 are stepped; the heat exchange tube 71 of the first heat exchange module 1 abuts on the stepped surface at one end of the flow channel hole 41, and the heat exchange tube 71 of the second heat exchange module 2 abuts on the stepped surface at the other end of the flow channel hole 41, that is, the CO2 gas enters the flow channel hole 41 after passing through the heat exchange tube 71 of the first heat exchange module 1, and then enters the second heat exchange tube 71 of the second heat exchange module 2; the heat exchange tube 71 abuts on the stepped surface of the flow channel hole 41, so that when the connecting flange 72 of the heat exchange tube 71 is detached from the end tube sheet 5, the heat exchange tube 71 can be detached from the connecting block 4.

[0030] Specifically, the intermediate tube sheet 6 is provided with a first penetration hole 61 corresponding to the heat exchange tube 71; the intermediate tube sheet 6 is also provided with a sealing groove 62 coaxially sleeved with the first penetration hole 61; a sealing ring 63 is sleeved on the circumferential surface of the heat exchange tube 71; when the heat exchange tube 71 is installed in place, the sealing ring 63 is placed in the sealing groove 62; under the setting of the sealing ring 63 and the sealing groove 62, the shell side medium of the first heat exchange module 1 and the second heat exchange module 2 can be prevented from entering the tube side; when the sealing ring 63 is placed in the sealing groove 62, the sealing ring 63 is deformed, thereby ensuring the sealing effect of the sealing ring 63 and the sealing groove 62; the connection method of the sealing ring 63 and the heat exchange tube 71 can refer to the existing technology. When the heat exchange tube 71 is replaced, the heat exchange tube 71 and the sealing ring 63 remain relatively still. The specific connection method of the sealing ring 63 and the heat exchange tube 71 can refer to the existing technology, for example, bonding or engaging through an annular groove.

[0031] Furthermore, the first heat exchange module 1 and the second heat exchange module 2 both include a baffle 8; a plurality of baffles 8 can be connected by existing technology; a second through hole 81 is provided on the baffle 8 for accommodating the heat exchange tube 71 to pass through; the hole wall of the second through hole 81 is serrated, that is, a small portion of the shell-side medium can pass through the gap between the second through hole 81 and the heat exchange tube 71, and the serrated gap can increase the heat exchange area, thereby ensuring the heat exchange efficiency.

[0032] Working process: The gas enters the tube side of the first heat exchange module 1 from the air inlet 32, reaches the flow channel hole 41 after being cooled by the first heat exchange module 1, and then enters the tube side of the second heat exchange module 2, and is discharged from the shell 3 from the air outlet 33 after being cooled by the second heat exchange module 2;

[0033] The cooling water of the first heat exchange module 1 enters the shell side of the first heat exchange module 1 and then flows out, and the Freon of the second heat exchange module 2 enters the shell side of the second heat exchange module 2 and then flows out.

[0034] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0035] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should be regarded as the protection scope of the utility model.

Claims

1. A dual temperature heat exchange device, characterized in that: include: A first heat exchange module (1), a second heat exchange module (2), a shell (3) and a connecting block (4); the first heat exchange module (1) and the second heat exchange module (2) are both located in the shell (3) and are respectively close to two end header boxes (31) of the shell (3); the first heat exchange module (1) and the second heat exchange module (2) both include an end tube sheet (5), an intermediate tube sheet (6) and a heat exchange tube bundle (7); the end tube sheet (5) and the intermediate tube sheet (6) are both connected to the shell (3) to form a closed space for accommodating the flow of shell-side medium of the first heat exchange module (1) or the second heat exchange module (2) ; the intermediate tube sheets (6) of the first heat exchange module (1) and the second heat exchange module (2) are adjacent; the connecting block (4) is located on the intermediate tube sheets (6) of the first heat exchange module (1) and the second heat exchange module (2); the two ends of each heat exchange tube (71) of the heat exchange tube bundle (7) are detachably connected to the end tube sheet (5) and the connecting block (4); the connecting block (4) is provided with flow channel holes (41) corresponding to the heat exchange tubes (71) of the first heat exchange module (1) and the second heat exchange module (2) so as to connect the tube paths of the first heat exchange module (1) and the second heat exchange module (2).

2. The dual temperature heat exchange device according to claim 1, characterized in that: The end tube sheet (5) is close to the end header box (31) of the shell (3); the end header box (31) of the shell (3) can be disassembled, and after disassembly, the end tube sheet (5) can be exposed; The heat exchange tube (71) is detachably connected to the end tube sheet (5) via a connecting flange (72) provided at the head thereof; the flow channel hole (41) is in the shape of an "I"; the heat exchange tube (71) of the first heat exchange module (1) abuts against a stepped surface at one end of the flow channel hole (41), and the heat exchange tube (71) of the second heat exchange module (2) abuts against a stepped surface at the other end of the flow channel hole (41).

3. The dual temperature heat exchange device according to claim 1, characterized in that: The intermediate tube plate (6) is provided with first penetration holes (61) corresponding one to one with the heat exchange tubes (71); the intermediate tube plate (6) is also provided with a sealing groove (62) coaxially sleeved with the first penetration holes (61); a sealing ring (63) is sleeved on the circumference of the heat exchange tube (71); when the heat exchange tube (71) is installed in place, the sealing ring (63) is placed in the sealing groove (62).

4. The dual temperature heat exchange device according to claim 1, characterized in that: The first heat exchange module (1) and the second heat exchange module (2) both further comprise a baffle (8); the baffle (8) is provided with a second through hole (81) for accommodating the heat exchange pipe (71) to pass through; the hole wall of the second through hole (81) is serrated.

5. The dual temperature heat exchange device according to claim 1, characterized in that: One end head box (31) of the shell (3) is provided with an air inlet (32), and the other end head box (31) is provided with an air outlet (33) and a liquid discharge pipe (34); the liquid discharge pipe (34) is connected to a first liquid discharge valve (35) and a second liquid discharge valve (36); after the first liquid discharge valve (35) or the second liquid discharge valve (36) is opened independently, the liquid discharge pipe (34) can be conducted.

6. The dual-temperature heat exchange device according to claim 5, characterized in that: A liquid level meter (9) is provided at the end of the housing (3) close to the liquid discharge pipe (34); the liquid level meter (9) is electrically connected to the first liquid discharge valve (35).

7. The dual-temperature heat exchange device according to claim 1, characterized in that: The first heat exchange module (1) and the second heat exchange module (2) are distributed vertically, and the shell-side media of the first heat exchange module (1) and the second heat exchange module (2) are different.

8. The dual-temperature heat exchange device according to claim 1, characterized in that: The shell-side medium of the first heat exchange module (1) is water, and the shell-side medium of the second heat exchange module (2) is Freon.

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