Combined heat exchanger

Abstract

The utility model discloses a combined heat exchanger which comprises a support. A heat exchange mechanism is arranged at the upper end of the support and comprises a shell, a water inlet pipeline, a snakelike pipeline, supporting plates, a water outlet pipeline and a connecting bent pipe, the shell is fixedly connected to the upper end of the support, and the supporting plates which are evenly distributed are fixedly connected to the inner walls of the left side and the right side of the shell; the inner space of a whole formed by the inner walls of the left side and the right side of the shell and the supporting plate is in a snake shape, snake-shaped pipelines which are evenly distributed are placed in the whole formed by the inner walls of the left side and the right side of the shell and the supporting plate, the snake-shaped pipelines are connected into a whole through connecting bent pipes, and the lower end of the snake-shaped pipeline on the foremost side is connected with a water inlet pipeline through a bolt. According to the combined heat exchanger, the retention time of flue gas in the heat exchanger is prolonged through the snake-shaped channel in the heat exchanger, meanwhile, circulating water circulates up and down in the heat exchanger for multiple times, and efficient recycling of flue gas waste heat is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a combined heat exchanger. Background Technique

[0002] When producing in fields such as electric coal mines, a large amount of flue gas will be generated. There is residual heat in the flue gas. In the early stage, the flue gas will be directly discharged, resulting in waste of this part of heat. Therefore, a heat exchanger is generally used. Absorb the heat in the flue gas to realize the recycling of heat and reduce energy waste.

[0003] After the flue gas passes through the heat exchanger, the heat is transferred to the cold pipe to heat the water inside. The heated water is stored in a storage tank (heat preservation tank) and can be used for heating in factories, etc. However, the existing heat exchanger directly discharges the flue gas after it contacts the cold pipe inside the heat exchanger. The residence time of the flue gas is short and the heat recovery efficiency is poor. Therefore, we propose a combined heat exchanger. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a combined heat exchanger. By lengthening the residence time of the flue gas inside the heat exchanger through the serpentine channel inside the heat exchanger, and at the same time, the circulating water circulates multiple times inside the heat exchanger, the efficient recovery and utilization of the waste heat of the flue gas can be realized, and the problems in the background technique can be effectively solved.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A combined heat exchanger, including a bracket;

[0006] Bracket: A heat exchange mechanism is arranged at the upper end thereof. The heat exchange mechanism includes a housing, a water inlet pipe, a serpentine pipe, a support plate, a water outlet pipe and a connecting elbow. The upper end of the bracket is fixedly connected with a housing. The inner walls on the left and right sides of the housing are both fixedly connected with evenly distributed support plates. The internal space formed by the inner walls on the left and right sides of the housing and the support plates is serpentine. Uniformly distributed serpentine pipes are placed inside the overall formed by the inner walls on the left and right sides of the housing and the support plates. The serpentine pipes are connected into a whole through connecting elbows. The lower end of the frontmost serpentine pipe is bolted to a water inlet pipe, and the upper end of the rearmost serpentine pipe is bolted to a water outlet pipe. By lengthening the residence time of the flue gas inside the heat exchanger through the serpentine channel inside the heat exchanger, and at the same time, the circulating water circulates up and down multiple times inside the heat exchanger, the efficient recovery and utilization of the waste heat of the flue gas can be realized.

[0007] Further, the heat exchange mechanism further includes support rods. Uniformly distributed support rods are fixedly connected between the front and rear inner walls of the housing. The lower surfaces of the support plates are respectively in contact with the upper surfaces of the adjacent lower support rods, improving the compressive strength of the support plates.

[0008] Furthermore, the heat exchange mechanism further includes a filter screen. The lower end inside the housing is slidably connected with a filter screen. Fixed mechanisms are arranged on the outer walls on the left and right sides of the housing. Buckles are provided on the left and right sides of the filter screen, and the buckles are respectively clamped on the front sides of the adjacent fixed mechanisms to filter out most impurities.

[0009] Furthermore, the fixed mechanism includes a fixed rod and a fixing plate. Fixing plates are arranged on the outer walls on the left and right sides of the housing. Fixed rods are inserted in the middles of the fixing plates. The fixed rods are "L"-shaped fixed rods, and the buckles are respectively clamped on the front sides of the adjacent fixed rods to fix the filter screen.

[0010] Furthermore, the fixed mechanism further includes sleeves, springs and fixing nuts. Sleeves are arranged on the rear sides of the fixing plates. Springs are placed inside the sleeves. The rear ends of the fixed rods respectively pass through the interiors of the adjacent springs, and the rear ends of the fixed rods are respectively threadedly connected with fixing nuts. The rear ends of the springs respectively contact the front sides of the adjacent fixing nuts to tighten the fixed rods, so that the front end of the filter screen closely adheres to the front side of the housing.

[0011] Furthermore, it further includes a circulating water tank and a water pump. The circulating water tank and the water pump are both placed on the left side of the bracket. A water pump is connected in series between the right side of the circulating water tank and the water inlet pipe. The input end of the water pump is electrically connected to the output end of the factory control terminal to convey cold water.

[0012] Furthermore, it further includes an energy storage tank. The energy storage tank is placed on the right side of the bracket. The upper end of the energy storage tank is communicated with the water outlet pipe to store hot water.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: This combined heat exchanger has the following advantages:

[0014] The flue gas of the production device enters the interior of the housing from the lower end of the housing. The filter screen filters out most impurities in the flue gas, prolonging the service life of this combined heat exchanger. The flue gas zigzags upward in the internal space formed by the inner walls on the left and right sides of the housing and the support plate as a serpentine channel. At the same time, the factory control terminal starts the water pump, and the cold water in the circulating water tank is sent by the water pump from the water inlet pipe into the interior of the whole formed by the serpentine pipes. The cold water sequentially passes through each serpentine pipe from front to back, fully absorbing the residual heat in the flue gas. The cold water becomes hot water and enters the energy storage tank through the water outlet pipe for storage. By lengthening the residence time of the flue gas in the heat exchanger through the serpentine channel inside the heat exchanger, and at the same time the cold water sequentially passes through each serpentine pipe from front to back, the efficient recovery and utilization of the waste heat of the flue gas are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a sectional structural diagram of the heat exchange mechanism of the present utility model;

[0017] Figure 3 This is the enlarged structural schematic diagram of part A of the present utility model.

[0018] In the figure: 1 bracket, 2 heat exchange mechanism, 21 housing, 22 water inlet pipe, 23 serpentine pipe, 24 support rod, 25 support plate, 26 water outlet pipe, 27 filter screen, 28 connecting elbow, 3 circulation water tank, 4 water pump, 5 energy storage tank, 6 fixing mechanism, 61 fixing rod, 62 fixing plate, 63 sleeve, 64 spring, 65 fixing nut, 7 buckle. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 , this embodiment provides a technical solution: a combined heat exchanger, including a bracket 1;

[0021] Bracket 1: A heat exchange mechanism 2 is provided at its upper end. The heat exchange mechanism 2 includes a housing 21, a water inlet pipe 22, a serpentine pipe 23, a support plate 25, a water outlet pipe 26, and a connecting elbow 28. The upper end of the bracket 1 is fixedly connected to the housing 21. The inner walls on the left and right sides of the housing 21 are both fixedly connected with evenly distributed support plates 25. The internal space formed by the inner walls on the left and right sides of the housing 21 and the support plates 25 is serpentine. Evenly distributed serpentine pipes 23 are placed inside the overall structure formed by the inner walls on the left and right sides of the housing 21 and the support plates 25. The serpentine pipes 23 are connected into a whole through the connecting elbows 28. The lower end of the foremost serpentine pipe 23 is bolted to the water inlet pipe 22, and the upper end of the rearmost serpentine pipe 23 is bolted to the water outlet pipe 26. Both the water inlet pipe 22 and the water outlet pipe 26 are located outside the housing 21. The heat exchange mechanism 2 further includes support rods 24. Evenly distributed support rods 24 are fixedly connected between the front and rear inner walls of the housing 21. The lower surfaces of the support plates 25 are respectively in contact with the upper surfaces of the adjacent lower support rods 24. The heat exchange mechanism 2 further includes a filter screen 27. The lower end inside the housing 21 is slidably connected with the filter screen 27. Fixed mechanisms 6 are provided on the outer walls on the left and right sides of the housing 21. Buckles 7 are provided on both the left and right sides of the filter screen 27, and the buckles 7 are respectively clamped to the front sides of the adjacent fixed mechanisms 6. The lower end of the housing 21 is connected to the exhaust port of the production device. The flue gas of the production device enters the inside of the housing 21 from the lower end of the housing 21. The filter screen 27 filters most of the impurities in the flue gas, extending the service life of this combined heat exchanger. The flue gas zigzags upward in the serpentine channel formed by the inner walls on the left and right sides of the housing 21 and the overall internal space of the support plates 25. At the same time, the factory control terminal starts the water pump 4, and the cold water in the circulation water tank 3 is sent into the inside of the overall structure formed by the serpentine pipes 23 from the water inlet pipe 22 by the water pump 4. The cold water sequentially passes through each serpentine pipe 23 from front to back, fully absorbing the residual heat in the flue gas;

[0022] The fixing mechanism 6 includes a fixing rod 61 and a fixing plate 62. Fixing plates 62 are provided on the outer walls on the left and right sides of the outer shell 21. Fixing rods 61 are inserted in the middle of the fixing plates 62. The fixing rod 61 is an "L"-shaped fixing rod. The buckles 7 are respectively clamped on the front sides of the adjacent fixing rods 61. The fixing mechanism 6 further includes a sleeve 63, a spring 64 and a fixing nut 65. Sleeves 63 are provided on the rear sides of the fixing plates 62. Springs 64 are placed inside the sleeves 63. The rear ends of the fixing rods 61 respectively pass through the interiors of the adjacent springs 64. The rear ends of the fixing rods 61 are respectively threadedly connected with fixing nuts 65. The rear ends of the springs 64 respectively contact the front sides of the adjacent fixing nuts 65. When the filter screen 27 needs to be cleaned, rotate the fixing rod 61. The fixing rod 61 is separated from the adjacent buckle 7, and the filter screen 27 is taken out. After the filter screen 27 is cleaned and reinstalled, the fixing rod 61 is clamped with the adjacent buckle 7, and the compressed spring 64 extends. The spring 64 generates a backward thrust on the fixing nut 65, so that the fixing rod 61 is firmly clamped with the adjacent buckle 7. The front end of the filter screen 27 closely adheres to the front side of the outer shell 21, preventing flue gas from leaking from the insertion position of the filter screen 27.

[0023] Wherein: It further includes a circulating water tank 3 and a water pump 4. The circulating water tank 3 and the water pump 4 are both placed on the left side of the bracket 1. A water pump 4 is connected in series between the right side of the circulating water tank 3 and the water inlet pipe 22. The input end of the water pump 4 is electrically connected to the output end of the factory control terminal to convey cold water.

[0024] Wherein: It further includes an energy storage tank 5. The energy storage tank 5 is placed on the right side of the bracket 1. The upper end of the energy storage tank 5 is communicated with the water outlet pipe 26 to store hot water.

[0025] The working principle of a combined heat exchanger provided by the present utility model is as follows: Connect the lower end of the outer shell 21 to the exhaust port of the production device. The flue gas of the production device enters the interior of the outer shell 21 from the lower end of the outer shell 21. The filter screen 27 filters most of the impurities in the flue gas, extending the service life of this combined heat exchanger. The flue gas zigzags upward in the internal space formed by the left and right inner walls of the outer shell 21 and the support plate 25 as a serpentine channel. At the same time, the factory control terminal starts the water pump 4. The cold water in the circulating water tank 3 is sent by the water pump 4 into the interior of the whole formed by the serpentine pipes 23 from the water inlet pipe 22. The cold water sequentially passes through each serpentine pipe 23 from front to back, fully absorbing the residual heat in the flue gas. The cold water becomes hot water and enters the energy storage tank 5 through the water outlet pipe 26 for storage. When the filter screen 27 needs to be cleaned, rotate the fixing rod 61. The fixing rod 61 is separated from the adjacent buckle 7, and the filter screen 27 is taken out. After the filter screen 27 is cleaned and reinstalled, the fixing rod 61 is clamped with the adjacent buckle 7, and the compressed spring 64 extends. The spring 64 generates a backward thrust on the fixing nut 65, so that the fixing rod 61 is firmly clamped with the adjacent buckle 7. The front end of the filter screen 27 closely adheres to the front side of the outer shell 21, preventing flue gas from leaking from the insertion position of the filter screen 27.

[0026] It should be noted that the water pump 4 disclosed in the above embodiments can be a DBY3S-15PTFF water pump, and the factory control terminal controls the operation of the water pump 4 by using the commonly used methods in the prior art.

[0027] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A combined heat exchanger, characterized in that: comprising a bracket (1); A support (1): a heat exchange mechanism (2) is arranged at the upper end thereof, the heat exchange mechanism (2) comprising an outer shell (21), an inlet pipe (22), a serpentine pipe (23), a support plate (25), an outlet pipe (26) and a connecting elbow (28); the upper end of the support (1) is fixedly connected to the outer shell (21); the inner walls on the left and right sides of the outer shell (21) are fixedly connected to the support plates (25) which are evenly distributed; the internal space of the whole formed by the inner walls on the left and right sides of the outer shell (21) and the support plates (25) is serpentine-shaped; the inside of the whole formed by the inner walls on the left and right sides of the outer shell (21) and the support plates (25) is evenly distributed, and the serpentine pipes (23) are connected to form a whole by connecting elbows (28); the lower end of the frontmost serpentine pipe (23) is connected to the inlet pipe (22) by bolts, and the upper end of the rearmost serpentine pipe (23) is connected to the outlet pipe (26) by bolts.

2. A combined heat exchanger according to claim 1, characterized in that: The heat exchange mechanism (2) further comprises support rods (24), and evenly distributed support rods (24) are fixedly connected between the front and rear inner walls of the shell (21), and the lower surface of the support plate (25) is respectively in contact with the upper surface of the support rods (24) adjacent to the lower ends.

3. A combined heat exchanger according to claim 1, characterized in that: The heat exchange mechanism (2) further comprises a filter screen (27), the filter screen (27) being slidably connected to the lower end of the interior of the shell (21), fixing mechanisms (6) being provided on both left and right outer walls of the shell (21), and buckles (7) being provided on both left and right sides of the filter screen (27), the buckles (7) being respectively buckled to the front sides of adjacent fixing mechanisms (6).

4. A combined heat exchanger according to claim 3, characterized in that: The fixing mechanism (6) comprises a fixing rod (61) and a fixing plate (62). The left and right outer walls of the housing (21) are each provided with a fixing plate (62). The middle of each fixing plate (62) is plugged with a fixing rod (61). The fixing rod (61) is an "L"-shaped fixing rod. The buckles (7) are respectively clamped to the front sides of adjacent fixing rods (61).

5. A combined heat exchanger according to claim 4, characterized in that: The fixing mechanism (6) further comprises a sleeve (63), a spring (64) and a fixing nut (65); the rear side of the fixing plate (62) is provided with a sleeve (63); the interior of the sleeve (63) is provided with a spring (64); the rear ends of the fixing rods (61) respectively pass through the interior of adjacent springs (64); the rear ends of the fixing rods (61) are threadedly connected with fixing nuts (65); and the rear ends of the springs (64) respectively contact the front side of adjacent fixing nuts (65).

6. A combined heat exchanger according to claim 1, characterized in that: It also includes a circulating water tank (3) and a water pump (4), wherein the circulating water tank (3) and the water pump (4) are both placed on the left side of the bracket (1), the water pump (4) is connected in series between the right side surface of the circulating water tank (3) and the water inlet pipe (22), and the input end of the water pump (4) is electrically connected to the output end of the factory control terminal.

7. A combined heat exchanger according to claim 1, characterized in that: It also includes an energy storage tank (5), which is placed on the right side of the bracket (1), and the upper end of the energy storage tank (5) is connected to the water outlet pipe (26).

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