Tower type heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a tower type heat exchanger which comprises an outer cover and a heat exchange assembly, the outer cover comprises a tower frame and baffle plates, and a plurality of baffle plates are distributed and fixed on the tower frame; the heat exchange assembly is arranged in the outer cover; the heat exchange assembly comprises a heat exchange connecting frame and a plurality of heat exchange supporting frames, the heat exchange supporting frames are detachably connected with the heat exchange connecting frame, and the heat exchange supporting frames are arranged at intervals from top to bottom; the heat exchange supporting frame comprises a connecting rod and a pair of supporting rods. A plurality of connecting rods are connected between the pair of supporting rods in an inserted mode, and the connecting rods are sleeved with spiral heat exchange pipes. One ends of the spiral heat exchange pipes are communicated through a water inlet pipe, and the other ends of the spiral heat exchange pipes are communicated through a water outlet pipe. A spiral heat exchange tube is adopted and is arranged outside the connecting rod in a sleeving manner; and after any spiral heat exchange tube is corroded, the spiral heat exchange tube can be independently replaced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field, concretely relates to a tower type heat exchanger. BACKGROUND

[0002] The flue heat exchanger of the coal-fired boiler is a device for recovering waste heat of flue gas. By transferring the heat in high-temperature flue gas to cooling medium (such as water or air), energy reuse is achieved, thereby improving energy utilization efficiency and reducing fuel consumption. This heat exchanger plays an important role in energy saving and environmental protection in the coal-fired boiler system.

[0003] There are various types of flue heat exchangers, including tube type, plate type, and fin type, etc. Different types of heat exchangers are suitable for different working conditions.

[0004] In actual application, the flue heat exchanger is usually installed in the tail flue of the boiler, such as between the air preheater and the dust collector. This arrangement can effectively reduce the flue gas temperature while avoiding equipment corrosion caused by excessively low temperature.

[0005] However, some problems need to be paid attention to when using the flue heat exchanger, such as preventing ash deposition and corrosion. Since the flue gas contains a large amount of dust and water vapor, it may cause fouling or corrosion on the surface of the heat exchanger. Therefore, appropriate measures need to be taken during design and operation, such as regular cleaning of ash deposition and timely replacement of corroded parts. However, the heat exchanger in the prior art is usually of an integral structure, which cannot be replaced or disassembled individually. SUMMARY

[0006] To solve the above technical problems, the utility model provides a tower type heat exchanger. The heat exchanger is arranged in multiple stages, which can increase the contact time with flue gas, thereby improving the heat exchange efficiency. Moreover, the structure is detachable, which can facilitate individual replacement and disassembly in the later stage.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A tower type heat exchanger, comprising an outer cover and a heat exchange assembly, the outer cover comprising a tower and a baffle, a plurality of baffles being fixedly distributed on the tower; the heat exchange assembly being arranged in the outer cover; the heat exchange assembly comprising a heat exchange connecting frame and a heat exchange support frame, the heat exchange support frame being detachably connected with the heat exchange connecting frame, the heat exchange support frame being provided with a plurality of heat exchange support frames, the plurality of heat exchange support frames being arranged at intervals from top to bottom;

[0009] The heat exchange support frame comprises a connecting rod and a pair of support rods; a plurality of connecting rods are inserted between the pair of support rods; the connecting rod is externally sleeved with a spiral heat exchange pipe; one end of each spiral heat exchange pipe is connected through an inlet pipe, and the other end of each spiral heat exchange pipe is connected through an outlet pipe.

[0010] The shape of the tower is square conical or conical.

[0011] The spiral heat exchange pipe adopts fluoroplastic pipe.

[0012] The heat exchange support frame is connected with the tower through a first connecting assembly, the first connecting assembly comprises a connecting rope and a connecting nut, one end of the connecting rope is fixedly connected with the tower, the other end of the connecting rope is threadedly connected with the connecting nut through the heat exchange support frame, and the other end of the connecting rope is fixedly provided with a corresponding stud; the first connecting assembly is provided with four.

[0013] The tower is fixedly provided with a limiting frame which is inserted with the heat exchange support frame.

[0014] The two second connecting assemblies are arranged between the pair of support rods, the second connecting assembly comprises a connecting screw rod and a fixing nut, and the two ends of the connecting screw rod are threadedly connected with the fixing nut through the corresponding support rods.

[0015] The second connecting assembly further comprises a movable insertion block and a wedge-shaped push block, the movable insertion block is slidably connected with the support rod, and a return spring is arranged between the movable insertion block and the support rod.

[0016] One end of the movable insertion block is provided with a slot, and the heat exchange connecting frame is provided with an insertion column corresponding to the slot; the wedge-shaped push block is slidably connected with the connecting screw rod, and the wedge-shaped push block is pushed to move by screwing the fixing nut; the movable insertion block is fixedly provided with a push rod matched with the wedge-shaped push block.

[0017] The support rod is fixedly provided with an insertion rod, and the connecting rod is provided with a corresponding insertion hole.

[0018] The water outlet pipe is communicated with a mixed flow box.

[0019] Compared with the prior art, the utility model has the beneficial effects that:

[0020] The heat exchange support frame is provided with a plurality of heat exchange support frames which are arranged at intervals from top to bottom, that is, a multi-stage arrangement structure is arranged; and in cooperation with the baffle plate on the tower, the contact time of the flue gas and the heat exchange pipe can be increased to some extent under the premise that the flue gas can normally flow through the heat exchanger, so as to strengthen the heat exchange effect.

[0021] The spiral heat exchange pipe is sleeved on the connecting rod; when any spiral heat exchange pipe is corroded, it can be replaced alone. Moreover, the threaded arrangement can realize efficient arrangement in a small volume, can increase the heat exchange volume, increase the contact area, and increase the contact time of the flue gas when flowing through the dense heat exchange pipe, so as to enhance the heat exchange effect.

[0022] The material of the spiral heat exchange pipe is fluorine plastic pipe, the pipe made of the material has strong plasticity, is corrosion resistant, and almost does not react with acid and alkaline gas in the flue gas; the comprehensive heat transfer coefficient of the pipe is obviously higher than that of a metal heat exchange pipe, and the surface friction coefficient is relatively low, which is not conducive to the adhesion of particulate matters in the flue gas, thereby avoiding affecting the heat exchange effect.

[0023] The first connecting assembly and the second connecting assembly are arranged in a structure, which facilitates later disassembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic diagram of the principle of the utility model;

[0025] Figure 2 is a schematic diagram of the split structure of the utility model;

[0026] Figure 3 is a schematic diagram of the structure of the outer cover of the utility model;

[0027] Figure 4 is a sectional view of the outer cover of the utility model;

[0028] Figure 5 is a schematic diagram of the structure of one direction of the heat exchange assembly of the utility model;

[0029] Figure 6 is a schematic diagram of the structure of another direction of the heat exchange assembly of the utility model;

[0030] Figure 7 is a schematic diagram of the structure of the heat exchange support frame of the utility model;

[0031] Figure 8 is Figure 7 is a local enlarged view of A in the middle;

[0032] Figure 9 is a sectional view of the heat exchange support frame of the utility model;

[0033] Figure 10 is a schematic diagram of the structure of the heat exchange connecting frame of the utility model;

[0034] Figure 11 is a schematic diagram of the structure of the second connecting assembly of the utility model;

[0035] Wherein: 1 is the outer cover, 10 is the tower, 11 is the baffle, 12 is the limit frame, 2 is the heat exchange assembly, 20 is the heat exchange connecting frame, 21 is the heat exchange support frame, 210 is the connecting rod, 211 is the support rod, 22 is the spiral heat exchange pipe, 23 is the water inlet pipe, 24 is the water outlet pipe, 25 is the plug rod, 3 is the first connecting assembly, 30 is the connecting rope, 31 is the connecting nut, 32 is the stud, 4 is the second connecting assembly, 40 is the connecting screw, 41 is the fixed nut, 42 is the movable plug, 420 is the insertion slot, 43 is the wedge-shaped push block, 44 is the return spring, 45 is the plug-in column, 46 is the push rod, 5 is the mixed flow box. DETAILED DESCRIPTION

[0036] The technical scheme in the embodiments of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0037] A tower type heat exchanger, comprising an outer cover 1 and a heat exchange assembly 2, the outer cover 1 comprises a tower 10 and a baffle 11, the tower 10 is fixedly distributed with a plurality of baffles 11, that is, a structure similar to a louvered window is formed, which can increase the contact time of flue gas and heat exchange pipes to some extent under the premise of ensuring that flue gas can normally flow through the heat exchanger, so as to strengthen the heat exchange effect. Specifically, the overall material of the outer cover 1 is preferably niobium metal alloy, which has high melting point and corrosion resistance, thereby reducing the maintenance frequency of the equipment.

[0038] The heat exchange assembly 2 is arranged in the outer cover 1; the heat exchange assembly 2 comprises a heat exchange connecting frame 20 and a heat exchange support frame 21, the heat exchange support frame 21 is detachably connected with the heat exchange connecting frame 20, the heat exchange support frame 21 is provided with a plurality of levels, one heat exchange support frame 21 is one level, and a plurality of heat exchange support frames 21 are arranged in intervals from top to bottom, that is, a multi-level arrangement structure is formed.

[0039] When installing, the heat exchanger can be arranged horizontally in the flue of the coal-fired boiler; the tower 10 is detachably fixedly connected with the flue.

[0040] Each heat exchange support frame 21 comprises a connecting rod 210 and a pair of support rods 211; a plurality of connecting rods 210 are inserted between the pair of support rods 211, and the connecting rod 210 is externally provided with a spiral heat exchange pipe 22; one end of each spiral heat exchange pipe 22 is communicated through a water inlet pipe 23, the other end of each spiral heat exchange pipe 22 is communicated through a water outlet pipe 24, and each spiral heat exchange pipe 22 is connected with the water inlet pipe 23 (the water outlet pipe 24) through a threaded interface pipe. When replacing the spiral heat exchange pipe 22 alone, the threaded interface pipes connected with the water inlet pipe 23 and the water outlet pipe 24 need to be removed respectively.

[0041] When any of the spiral heat exchange pipes 22 needs to be replaced due to corrosion, the heat exchange support frame 21 is first separated from the tower 10, and then the corresponding heat exchange support frame 21 is separated from the heat exchange connecting frame 20, so that the corresponding spiral heat exchange pipe 22 can be replaced alone.

[0042] Further, the tower 10 is square conical or conical in shape. The spiral heat exchange pipe 22 is preferably made of fluoroplastic pipe.

[0043] Further, in order to facilitate the separation of the heat exchange support frame 21 from the tower 10, the heat exchange support frame 21 is preferably connected to the tower 10 through the first connecting assembly 3. Four first connecting assemblies 3 are provided, i.e. the heat exchange support frame 21 is connected to the tower 10 through the four first connecting assemblies 3.

[0044] The first connecting assembly 3 includes a connecting rope 30 and a connecting nut 31. One end of the connecting rope 30 is fixedly connected to the tower 10, and a stud 32 is fixedly connected to the other end of the connecting rope 30. The other end of the connecting rope 30 is inserted through the heat exchange support frame 21, and the stud 32 is threadedly connected to the connecting nut 31, so that the heat exchange support frame 21 is connected to the tower 10. When disassembly is required, the connecting bolt is removed, and the heat exchange support frame 21 is separated from the tower 10.

[0045] Further, the tower 10 is fixedly connected to the tower 10. When the connecting nut 31 is tightened, the upper end of the heat exchange support frame 21 is inserted into the limiting frame 12.

[0046] Further, the pair of support rods 211 are connected through two second connecting assemblies 4. The second connecting assembly 4 includes a connecting screw 40 and a fixed nut 41. The two ends of the connecting screw 40 are respectively threadedly connected to the fixed nut 41 through the corresponding support rods 211. By tightening the fixed nut 41, the two support rods 211 are pressed against the connecting rod 210, thereby achieving the function of fixation.

[0047] When a connecting pipe needs to be removed, any of the fixed nuts 41 is removed, and the connecting rod 210 on one side is separated. Then the corresponding spiral heat exchange pipe 22 (the threaded interface pipe has been removed) is pulled out of the connecting rod 210.

[0048] Further, the second connecting assembly 4 further includes a movable plug 42 and a wedge-shaped push block 43. The movable plug 42 is slidably connected to the support rod 211, and a return spring 44 is arranged between the movable plug 42 and the support rod 211. The two ends of the return spring 44 are respectively fixedly connected to the movable plug 42 and the support rod 211. A plug groove 420 is arranged at one end of the movable plug 42, and a plug-in column 45 corresponding to the plug groove 420 is arranged on the heat exchange connecting frame 20.

[0049] The wedge-shaped push block 43 is in sliding connection with the connecting screw rod 40, and a push rod 46 matched with the wedge-shaped push block 43 is fixed on the movable plug block 42. During the process of tightening the fixing nut 41, the fixing nut 41 pushes the wedge-shaped push block 43 to move; when the wedge-shaped push block 43 moves, the push rod 46 assembly is contacted, the insertion slot 420 of the movable plug block 42 is inserted with the insertion column 45, and the elastic potential energy of the reset spring 44 is generated.

[0050] That is, during the process of tightening the fixing nut 41, the movable plug block 42 is first extended to be inserted with the insertion column 45, and the insertion of the support rod 211 and the heat exchange connecting frame 20 is realized. After the fixing nut 41 is finally tightened, the two support rods 211 can press the connecting rod 210, and the fixing effect is achieved.

[0051] Further, the insertion rod 25 is fixed on the support rod 211, and the insertion hole is arranged on the connecting rod 210, and the insertion rod 25 can be inserted into the insertion hole.

[0052] When the spiral heat exchange pipe 22 needs to be replaced, during the process of loosening the fixing nut 41, the reset spring 44 releases the elastic potential energy, so that the insertion slot 420 of the movable plug block 42 is separated from the insertion column 45. Then, the corresponding heat exchange support frame 21 and the heat exchange connecting frame 20 can be separated; and during the separation process, since the nut is not completely removed, and the insertion rod 25 of the support rod 211 is still inserted into the insertion hole on the connecting rod 210, that is, the heat exchange support frame 21 is still an "integrated whole", and will not be scattered.

[0053] Further, the water outlet pipe 24 is communicated with the mixed flow box 5, and the mixed flow box 5 is provided with a corresponding water outlet; the water flow passes through the water inlet pipe 23 and flows through each spiral heat exchange pipe 22 (contacting with flue gas to absorb heat); finally, the water flow is collected into the mixed flow box 5 through the water outlet pipe 24; the water in the mixed flow box is discharged to the required position through the water outlet. Since the upper and lower multi-stage arrangement is adopted, there is a certain difference in the water temperature discharged from each spiral heat exchange pipe 22; therefore, by arranging the mixed flow box 5, the discharged water is mixed to reduce the temperature difference.

[0054] The above only describes the preferred embodiment of the utility model in detail, but the utility model is not limited to the above embodiment.

Claims

1. A column heat exchanger characterized by: The application relates to a heat exchange device, which comprises an outer cover (1) and a heat exchange assembly (2), the outer cover (1) comprises a tower (10) and baffles (11), the tower (10) is provided with a plurality of baffles (11) which are fixedly arranged on the tower (10) in a distributed mode; the heat exchange assembly (2) is arranged in the outer cover (1); the heat exchange assembly (2) comprises a heat exchange connecting frame (20) and heat exchange support frames (21), the heat exchange support frames (21) are detachably connected with the heat exchange connecting frame (20), and a plurality of heat exchange support frames (21) are arranged in a spaced mode from top to bottom. The heat exchange support frame (21) comprises connecting rods (210) and a pair of support rods (211), a plurality of connecting rods (210) are inserted between the pair of support rods (211), and the connecting rods (210) are externally provided with spiral heat exchange pipes (22); one end of each spiral heat exchange pipe (22) is communicated through a water inlet pipe (23), and the other end of each spiral heat exchange pipe (22) is communicated through a water outlet pipe (24).

2. A shell-and-tube heat exchanger according to claim 1, characterized in that: The tower (10) is in the shape of a square cone or a circular cone.

3. A shell-and-tube heat exchanger according to claim 1, wherein: The spiral heat exchange pipes (22) are made of fluoroplastic pipes.

4. A shell-and-tube heat exchanger according to claim 1, wherein: The heat exchange support frame (21) is connected with the tower (10) through a first connecting assembly (3), the first connecting assembly (3) comprises connecting ropes (30) and connecting nuts (31), one end of the connecting rope (30) is fixedly connected with the tower (10), the other end of the connecting rope (30) is threadedly connected with the connecting nut (31) through the heat exchange support frame (21), and the other end of the connecting rope (30) is fixedly provided with a corresponding stud (32); the first connecting assembly (3) is provided with four.

5. A heat exchanger according to claim 1 or 4, characterised in that: The tower (10) is internally fixed with a limiting frame (12) which is inserted with the heat exchange support frame (21).

6. A shell-and-tube heat exchanger according to claim 1, wherein: The pair of support rods (211) are connected through two second connecting assemblies (4), the second connecting assembly (4) comprises connecting screws (40) and fixing nuts (41), and the two ends of the connecting screw (40) are respectively threadedly connected with the fixing nut (41) through the corresponding support rod (211).

7. A heat exchanger according to claim 6, wherein: The second connecting assembly (4) further comprises a movable insertion block (42) and a wedge-shaped pushing block (43), the movable insertion block (42) is slidably connected with the support rod (211), and a return spring (44) is arranged between the movable insertion block (42) and the support rod (211); One end of the movable insertion block (42) is provided with an insertion slot (420), and the heat exchange connecting frame (20) is provided with an insertion column (45) corresponding to the insertion slot (420); the wedge-shaped pushing block (43) is slidably connected with the connecting screw (40), the wedge-shaped pushing block (43) is driven to move by rotating the fixing nut (41); the movable insertion block (42) is fixedly provided with a pushing rod (46) matched with the wedge-shaped pushing block (43).

8. A shell-and-tube heat exchanger according to claim 1, wherein: The support rod (211) is fixedly provided with an insertion rod (25), and the connecting rod (210) is provided with a corresponding insertion hole.

9. A shell-and-tube heat exchanger according to claim 1, wherein: The water outlet pipe (24) is communicated with a mixed flow box (5).

Images