Large-flow bent pipe type heat exchanger

Abstract

The utility model discloses a large-flow elbow pipe type heat exchanger, and relates to the technical field of heat exchangers. The heat exchanger comprises a heat exchanger cylinder and a heat exchange tube set, the cylinder comprises an upper cylinder and a lower cylinder, an upper confluence channel is arranged in the upper cylinder, an air outlet tube is connected to the outer side of the upper confluence channel, the lower cylinder comprises a cylinder wall, a middle confluence channel is fixed to the outer side of the top end of the cylinder wall, and an air inlet tube is connected to the outer side of the middle confluence channel. Cooling gas is discharged to the bottom from the interlayer of the cylinder wall from top to bottom, the temperature of the outer wall of the heat exchanger can be reduced, heat loss is reduced, namely cold air can exchange heat with hot smoke in the heat exchanger in the interlayer, heat exchange pipes in the center of the heat exchanger are bent and densely arranged, the heat exchange effect of the heat exchanger can be improved, and the heat exchange efficiency of the heat exchanger is improved. And meanwhile, the bent heat exchange tubes do not occupy the space of the top end and the bottom end of the heat exchanger, so that input and output of large-flow flue gas are facilitated, and efficient heat exchange of the large-flow flue gas is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, in particular to a large flow elbow type heat exchanger. Background Art

[0002] The flow of flue gas in the existing heat exchanger will be affected by the air resistance caused by the obstruction of the heat exchange tube, which will cause the problem of reduced gas flow rate. Therefore, the existing heat exchanger structure is not suitable for the use of large-flow flue gas. It can only be suitable for the use of large-flow flue gas by increasing the volume of the equipment or increasing the number of heat exchanger equipment. However, this will lead to problems such as high cost, waste of energy and difficulty in installation, maintenance and repair. Utility Model Content

[0003] The utility model aims to provide a large-flow curved tube heat exchanger, in which the cooling gas is first discharged from the interlayer of the tube wall from top to bottom to the bottom, so as to reduce the temperature of the outer wall of the heat exchanger and reduce heat loss, that is, the cold air can also exchange heat with the hot flue gas in the heat exchanger in the interlayer, and the heat exchange tubes in the center of the heat exchanger are bent and densely arranged, which can improve the heat exchange effect of the heat exchanger. At the same time, the bent heat exchange tubes will not occupy the space at the top and bottom of the heat exchanger, so as to facilitate the input and output of large-flow flue gas and realize efficient heat exchange of large-flow flue gas.

[0004] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0005] The utility model is a large flow elbow type heat exchanger, comprising a heat exchanger cylinder and a heat exchange tube group;

[0006] The cylinder comprises an upper cylinder and a lower cylinder;

[0007] An upper confluence channel is provided in the upper cylinder, and an air outlet pipe is connected to the outer side of the upper confluence channel;

[0008] The lower cylinder includes a cylinder wall, a middle confluence channel is fixed on the outer side of the top of the cylinder wall, an air inlet pipe is connected to the outer side of the middle confluence channel, the bottom end of the upper cylinder is fixed to the top of the lower cylinder, and a sealing member is provided at the connection between the upper cylinder and the lower cylinder;

[0009] A ventilation interlayer is provided inside the cylinder wall, an upper notch communicating with the middle confluence channel is provided at the top of the outer cylinder body of the cylinder wall, a lower confluence channel is fixed inside the bottom end of the cylinder wall, and a lower notch communicating with the lower confluence channel is provided at the bottom end of the inner cylinder body of the cylinder wall;

[0010] The heat exchange tube group is composed of a plurality of heat exchange tube bodies, which are evenly and staggeredly arranged in a ring shape in the cylinder wall, and the heat exchange tube body is a curved tube structure, and the two ends of the heat exchange tube body are respectively connected to the bottom of the upper converging channel and the top of the lower converging channel;

[0011] The top end of the upper cylinder and the bottom end of the lower cylinder are respectively the smoke outlet and the smoke inlet, and the inner sides of the upper converging channel and the lower converging channel are both fixed with fire-resistant structures.

[0012] Furthermore, cooling gas is input into the air inlet pipe, and the cooling gas passes through the middle converging channel, the ventilation interlayer, the lower converging channel, a plurality of heat exchange tube bodies and the upper converging channel in sequence and is output from the air outlet pipe.

[0013] Furthermore, the top surface of the middle converging channel is flush with the top end surface of the cylinder wall and forms a lower slope, and the bottom surface of the upper cylinder body is provided with an upper slope that is consistent with and fits with the lower slope.

[0014] Furthermore, the fire-resistant structure includes a backing plate, a refractory material is provided on the inner side of the backing plate, a cylindrical opening is provided at the axis of the refractory material, and the smoke outlet and the smoke inlet are formed by the opening.

[0015] Furthermore, an outer edging is provided at the bottom edge of the upper cylinder, a supporting edge is provided on the peripheral side surface of the top end of the lower cylinder, and the sealing member is arranged inside the outer edging and above the supporting edge.

[0016] Furthermore, the sealing element is composed of a plurality of packing layers, and the plurality of packing layers are arranged in an upper and lower array inside the outer edge.

[0017] Furthermore, a plurality of reinforcement points are provided at the upper inner part and the lower inner part of the ventilation interlayer.

[0018] The utility model has the following beneficial effects:

[0019] 1. The cooling gas of the utility model is first discharged from the interlayer of the cylinder wall from top to bottom to the bottom, which can reduce the temperature of the outer wall of the heat exchanger and reduce heat loss. That is, the cold air can also exchange heat with the hot flue gas in the heat exchanger in the interlayer, and the heat exchange tubes in the center of the heat exchanger are bent and densely arranged, which can improve the heat exchange effect of the heat exchanger. At the same time, the bent heat exchange tubes will not occupy the space at the top and bottom of the heat exchanger, which is conducive to the input and output of large-flow flue gas and realizes efficient heat exchange of large-flow flue gas.

[0020] 2. The utility model can increase the contact area between the heat exchange tube and the hot flue gas by designing a curved heat exchange tube. The curved tube can increase the length of the heat exchange tube, thereby further increasing the heat exchange area. The bending of the heat exchange tube can make the flue gas inlet and outlet on the same axis, and reserve enough space for the flue gas inlet and outlet. After reserving enough space, heat exchange of large-flow flue gas can be achieved. Secondly, the curved heat exchange tube has a certain deformation and expansion ability. When the heat exchange tube is deformed due to alternating hot and cold, a buffer is formed to increase the service life.

[0021] 3. The utility model designs a fire-resistant structure at the inlet and outlet of the flue gas, which can reduce the damage and temperature conduction of the inlet and outlet of the flue gas caused by the high-temperature flue gas, and improve the service life and stability of the heat exchanger.

[0022] 4. The utility model designs a stacked seal at the connection between the upper cylinder and the lower cylinder, and selects a high-temperature resistant filler layer, which can avoid deformation, burning and leakage of the seal after high temperature, thereby improving the sealing effect and service life. The reason why welding is not used for connection is that the heat exchanger is repeatedly heated and cooled, and the heat exchanger has a large amount of smoke and produces a large deformation. The use of filler seals can make the heat exchanger move relatively when it is deformed. If welding is used, repeated deformation and stretching will damage the weld, causing leakage in the heat exchanger.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic structural diagram of a large flow elbow heat exchanger of the utility model;

[0026] Figure 2 It is a schematic diagram of the structure of the utility model after half is cut away;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0029] Figure 5 It is a structural schematic diagram of a heat exchange tube group;

[0030] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0031] 1-upper cylinder, 2-lower cylinder, 3-heat exchange tube body, 4-refractory structure, 101-upper confluence channel, 102-air outlet pipe, 103-outer edging, 201-cylinder wall, 202-middle confluence channel, 203-air inlet pipe, 204-seal, 205-ventilation interlayer, 206-upper notch, 207-lower confluence channel, 208-lower notch, 209-support edge, 210-reinforcement point, 401-pad, 402-refractory material, 403-opening. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-5 As shown, the utility model is a large flow elbow heat exchanger, comprising a heat exchanger cylinder and a heat exchange tube group;

[0034] The cylinder comprises an upper cylinder 1 and a lower cylinder 2;

[0035] An upper confluence channel 101 is provided in the upper cylinder 1, and an air outlet pipe 102 is connected to the outer side of the upper confluence channel 101;

[0036] The lower cylinder 2 includes a cylinder wall 201, a middle confluence channel 202 is fixed on the outer side of the top of the cylinder wall 201, and an air inlet pipe 203 is connected to the outer side of the middle confluence channel 202. The bottom end of the upper cylinder 1 is fixed to the top of the lower cylinder 2, and a sealing member 204 is provided at the connection between the upper cylinder 1 and the lower cylinder 2.

[0037] A ventilation interlayer 205 is provided inside the cylinder wall 201, an upper notch 206 communicating with the middle confluence channel 202 is provided at the top of the outer cylinder body of the cylinder wall 201, a lower confluence channel 207 is fixed inside the bottom end of the cylinder wall 201, and a lower notch 208 communicating with the lower confluence channel 207 is provided at the bottom end of the inner cylinder body of the cylinder wall 201;

[0038] The heat exchange tube group is composed of a plurality of heat exchange tube bodies 3, which are evenly and staggeredly arranged in a ring shape in the cylinder wall 201. The heat exchange tube body 3 is a curved tube structure, and the two ends of the heat exchange tube body 3 are respectively connected to the bottom of the upper converging channel 101 and the top of the lower converging channel 207;

[0039] The top end of the upper cylinder 1 and the bottom end of the lower cylinder 2 are respectively the smoke outlet and the smoke inlet, and the inner sides of the upper converging channel 101 and the lower converging channel 207 are both fixed with a fire-resistant structure 4.

[0040] Among them, cooling gas is input at the air inlet pipe 203, and the cooling gas passes through the middle converging channel 202, the ventilation interlayer 205, the lower converging channel 207, a plurality of heat exchange tube bodies 3 and the upper converging channel 101 in sequence and is output from the air outlet pipe 102. The flue gas is input from the bottom of the lower cylinder 2 and output from the upper cylinder 1, and heat exchange is carried out inside the cylinder wall 201.

[0041] Among them Figure 2-3 As shown, the top surface of the middle converging channel 202 is flush with the top end surface of the cylinder wall 201 and forms a lower slope, and the bottom surface of the upper cylinder body 1 is provided with an upper slope that is consistent with and fits with the lower slope.

[0042] Among them Figure 1-2 and Figure 4 As shown, the fire-resistant structure 4 includes a backing plate 401 , a refractory material 402 is provided on the inner side of the backing plate 401 , a cylindrical opening 403 is provided at the axis of the refractory material 402 , and a smoke outlet and a smoke inlet are formed by the opening 403 .

[0043] Among them Figure 2-3 As shown, an outer rim 103 is provided at the bottom edge of the upper cylinder 1 , a supporting edge 209 is provided on the peripheral side surface of the top end of the lower cylinder 2 , and the sealing member 204 is arranged inside the outer rim 103 and above the supporting edge 209 .

[0044] Among them Figure 3 As shown, the sealing member 204 is composed of a plurality of packing layers, and the plurality of packing layers are arranged in an upper and lower array inside the outer edge 103 .

[0045] Among them Figure 2 As shown, a plurality of reinforcement points 210 are provided at the upper inner portion and the lower inner portion of the ventilation interlayer 205 .

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A large flow elbow heat exchanger, comprising a heat exchanger barrel and a heat exchange tube group, characterized in that: The cylinder comprises an upper cylinder (1) and a lower cylinder (2); An upper converging channel (101) is provided in the upper cylinder (1), and an air outlet pipe (102) is connected to the outer side of the upper converging channel (101); The lower cylinder (2) comprises a cylinder wall (201), a middle converging channel (202) is fixed on the outer side of the top end of the cylinder wall (201), an air inlet pipe (203) is connected to the outer side of the middle converging channel (202), the bottom end of the upper cylinder (1) is fixed to the top end of the lower cylinder (2), and a sealing member (204) is provided at the connection between the upper cylinder (1) and the lower cylinder (2); A ventilation interlayer (205) is provided inside the cylinder wall (201); an upper notch (206) communicating with the middle converging channel (202) is provided at the top of the outer cylinder body of the cylinder wall (201); a lower converging channel (207) is fixed inside the bottom end of the cylinder wall (201); and a lower notch (208) communicating with the lower converging channel (207) is provided at the bottom end of the inner cylinder body of the cylinder wall (201); The heat exchange tube group is composed of a plurality of heat exchange tube bodies (3), the plurality of heat exchange tube bodies (3) are arranged in a ring-shaped, uniform and staggered manner in the cylinder wall (201), the heat exchange tube body (3) is a curved tube structure, and the two ends of the heat exchange tube body (3) are respectively connected to the bottom of the upper converging channel (101) and the top of the lower converging channel (207); The top end of the upper cylinder (1) and the bottom end of the lower cylinder (2) are respectively a smoke outlet and a smoke inlet, and a fire-resistant structure (4) is fixed inside the upper converging channel (101) and the lower converging channel (207).

2. A large flow elbow heat exchanger according to claim 1, characterized in that: Cooling gas is input into the air inlet pipe (203), and the cooling gas passes through the middle converging channel (202), the ventilation interlayer (205), the lower converging channel (207), a plurality of heat exchange tube bodies (3) and the upper converging channel (101) in sequence and is output from the air outlet pipe (102).

3. A large flow elbow heat exchanger according to claim 1, characterized in that: The top surface of the middle converging channel (202) is flush with the top end surface of the cylinder wall (201) and forms a lower slope, and the bottom surface of the upper cylinder (1) is provided with an upper slope that is consistent with and fits with the lower slope.

4. A large flow elbow heat exchanger according to claim 1, characterized in that: The fire-resistant structure (4) comprises a backing plate (401), a refractory material (402) is arranged on the inner side of the backing plate (401), a cylindrical opening (403) is arranged at the axis of the refractory material (402), and the smoke outlet and the smoke inlet are formed by the opening (403).

5. A large flow elbow heat exchanger according to claim 1, characterized in that: The upper cylinder (1) is provided with an outer rim (103) at the bottom edge, the upper end peripheral side surface of the lower cylinder (2) is provided with a support edge (209), and the sealing member (204) is arranged inside the outer rim (103) and above the support edge (209).

6. A large flow elbow heat exchanger according to claim 5, characterized in that: The sealing element (204) is composed of a plurality of packing layers, and the plurality of packing layers are arranged in an upper and lower array inside the outer edge (103).

7. A large flow elbow heat exchanger according to claim 1, characterized in that: The upper inner portion and the lower inner portion of the ventilation interlayer (205) are both provided with a plurality of reinforcement points (210).

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