Efficient and compact heat exchange device

Abstract

The utility model discloses an efficient compact heat exchange device, which relates to the technical field of heat exchange equipment, and comprises a fan and a heat exchange mechanism, and the heat exchange mechanism comprises an upper water tank, a lower water tank, a connecting pipe, a heat exchange shell, a baffle plate and a baffle ring. Cooling liquid flows along the multiple sets of heat exchange pipes for three return strokes, meanwhile, the baffle and the baffle ring can enable smoke to increase the smoke flowing path within the effective linear distance, the heat exchange area of high-temperature smoke and low-temperature cooling liquid is increased, the heat exchange device is reasonable in design, the flowing state of the high-temperature smoke and the low-temperature cooling liquid can be more beneficial to rapid heat transfer, and the heat exchange efficiency is improved. Heat exchange between smoke and a heat exchange medium is sufficient, the heat exchange efficiency of the heat exchange device in a smaller space is higher, the dust scraping plate capable of moving up and down is additionally arranged in the heat exchange shell, dust accumulated on the surfaces of the heat exchange pipes is scraped away, and the heat exchange effect of the heat exchange device is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a high-efficiency and compact heat exchange device. Background Technology

[0002] In industrial production processes, many processes generate a large amount of high-temperature flue gas. This high-temperature flue gas not only carries a lot of heat energy, but if it is directly discharged, it will not only cause a huge waste of energy, but also cause thermal pollution to the environment. At present, there are various devices on the market for heat exchange of high-temperature flue gas.

[0003] For example, Chinese patent CN213021140U discloses a flue gas heat exchanger, which includes multiple heat pipes; the flue gas heat exchanger also includes multiple sleeves that correspond one-to-one with the heat pipes and allow the cooling medium to flow through; the heat pipes include condenser tube sections that exchange heat with the cooling medium, and each heat pipe condenser tube section is inserted into a corresponding sleeve; the flue gas heat exchanger includes multiple first pipes arranged in parallel and multiple second pipes arranged in parallel, and a row of sleeves is arranged between a corresponding first pipe and a second pipe; at least some of the first pipes, second pipes, and sleeves cooperate to form a serpentine spatial flow channel.

[0004] In traditional tubular heat exchangers, the flue gas flows outside the tubes while the heat exchange medium flows inside. The contact area between the two is limited, and the flow pattern is not conducive to rapid heat transfer. Due to unreasonable heat exchange structure design, the heat exchange between the flue gas and the heat exchange medium is insufficient, resulting in low overall heat exchange efficiency of the heat exchange device. In addition, high-temperature flue gas contains dust and other impurities, which may accumulate on the surface of the heat exchange tubes during long-term operation, affecting the heat exchange effect. To address the above problems, a high-efficiency and compact heat exchange device is proposed. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art and to propose a high-efficiency and compact heat exchange device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency and compact heat exchange device, comprising a fan and a heat exchange mechanism, wherein the heat exchange mechanism comprises an upper water tank, a lower water tank, a connecting pipe, a heat exchange shell, baffles and baffle rings, the upper water tank and the lower water tank being fixedly installed at the upper and lower ends of the heat exchange shell respectively, the top end of the connecting pipe being fixedly installed at the top end of the upper water tank, and the bottom end of the connecting pipe extending into the heat exchange shell and being fixedly connected to a perforated pipe, the upper water tank having three baffles I fixedly arranged in a ring array inside, and the lower water tank having three baffles II fixedly arranged in a ring array inside, the outer edge of the lower water tank being fixedly connected to an inlet pipe and an outlet pipe located between adjacent baffles II, the heat exchange shell having baffles and baffle rings respectively arranged from top to bottom inside, and the baffles having gaps with the inner wall of the heat exchange shell, and six sets of heat exchange tubes being fixedly connected in a ring array between the upper water tank and the lower water tank, namely the first set of heat exchange tubes, the second set of heat exchange tubes, the third set of heat exchange tubes, the fourth set of heat exchange tubes, the fifth set of heat exchange tubes and the sixth set of heat exchange tubes.

[0007] Preferably, every two sets of heat exchange tubes are located between adjacent partitions, and the bottom end of the sixth set of heat exchange tubes is fixedly connected to the top of the outlet pipe.

[0008] Preferably, a filter screen is snapped into the inside of the connecting pipe, and a dust scraper is slidably connected to the inner wall of the heat exchange shell.

[0009] Preferably, a stepper motor is fixedly connected to the top of the retaining ring, and a lead screw is fixedly connected to the output end of the stepper motor.

[0010] Preferably, the top end of the lead screw is rotatably connected to the bottom of the upper water tank, and a connecting ring is provided on the top of the dust scraper.

[0011] Preferably, the inner wall of the connecting ring is threaded into the outer side of the lead screw, and an air outlet pipe is fixedly connected to the bottom end of the heat exchange shell.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, high-temperature flue gas is evenly dispersed into the heat exchange shell through a porous pipe, avoiding the accumulation of high-temperature flue gas and improving the heat exchange effect of the flue gas. Low-temperature coolant enters the lower water tank through the inlet pipe. The device divides the upper water tank and the lower water tank by partition one and partition two respectively. The coolant flows along multiple sets of heat exchange tubes in three rounds and is finally discharged through the outlet pipe. At the same time, by adding baffles and baffle rings inside the heat exchange shell and at the bottom, the flow path of the flue gas is increased within the effective straight distance, thereby increasing the heat exchange area between the high-temperature flue gas and the low-temperature coolant. The heat exchange device is reasonably designed, which can make the flow state of the high-temperature flue gas and the low-temperature coolant more conducive to the rapid heat transfer. The heat exchange between the flue gas and the heat exchange medium is sufficient, making the heat exchange device more efficient in a smaller space.

[0014] 2. In this utility model, by adding a dust scraper that can move up and down inside the heat exchange shell, and by driving the lead screw to rotate through the stepper motor, the dust scraper slides up / down along the heat exchange shell, thereby scraping off the dust accumulated on the surface of the heat exchange tube and improving the heat exchange effect of the heat exchange device. Attached Figure Description

[0015] Figure 1 This is a front sectional view of a high-efficiency and compact heat exchange device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the heat exchanger shell of a high-efficiency and compact heat exchanger proposed in this utility model.

[0017] Figure 3 This is a side sectional view of a high-efficiency and compact heat exchange device proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of multiple heat exchange tubes in a high-efficiency and compact heat exchange device proposed in this utility model.

[0019] Figure 5 This is a bottom view of the lower water tank of a high-efficiency and compact heat exchange device proposed in this utility model.

[0020] Legend: 1. Fan; 2. Heat exchange mechanism; 21. Upper water tank; 22. Lower water tank; 23. Connecting pipe; 24. Perforated pipe; 25. Inlet pipe; 26. Outlet pipe; 27. Outlet pipe; 28. Stepper motor; 29. ​​Heat exchange shell; 210. Lead screw; 211. Dust scraper; 212. Filter screen; 213. Connecting ring; 214. Baffle; 215. Baffle ring; 216. Partition 1; 217. Partition 2; 218. First group of heat exchange tubes; 219. Second group of heat exchange tubes; 220. Third group of heat exchange tubes; 221. Fourth group of heat exchange tubes; 222. Fifth group of heat exchange tubes; 223. Sixth group of heat exchange tubes; 224. Upper through hole; 225. Lower through hole. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-5 As shown, this utility model provides a high-efficiency and compact heat exchange device, including a fan 1 and a heat exchange mechanism 2. The heat exchange mechanism 2 includes an upper water tank 21, a lower water tank 22, a connecting pipe 23, a heat exchange shell 29, a baffle 214, and a baffle ring 215. The upper water tank 21 and the lower water tank 22 are respectively fixedly installed at the upper and lower ends of the heat exchange shell 29. The top end of the connecting pipe 23 is fixedly installed with the top end of the upper water tank 21, and the bottom end of the connecting pipe 23 extends into the heat exchange shell 29 and is fixedly connected to a perforated pipe 24. Three baffles 216 are fixedly arranged in a ring array inside the upper water tank 21, and three baffles 217 are fixedly arranged in a ring array inside the lower water tank 22. The outer edge of the lower water tank 22 is fixedly connected to a baffle located at the same position. The inlet pipe 25 and outlet pipe 26 are located between adjacent partition 217. Inside the heat exchange shell 29, baffles 214 and baffle rings 215 are respectively installed from top to bottom, and a gap is left between the baffles 214 and the inner wall of the heat exchange shell 29. Six sets of heat exchange tubes are fixedly connected in a ring array between the upper water tank 21 and the lower water tank 22. They are the first set of heat exchange tubes 218, the second set of heat exchange tubes 219, the third set of heat exchange tubes 220, the fourth set of heat exchange tubes 221, the fifth set of heat exchange tubes 222 and the sixth set of heat exchange tubes 223. Each pair of heat exchange tubes is located between adjacent partition 217. The bottom end of the sixth set of heat exchange tubes 223 is fixedly connected to the top of the outlet pipe 26. The bottom end of the heat exchange shell 29 is fixedly connected to the air outlet pipe 27.

[0024] The specific setup and function of this embodiment are described below: The upper water tank 21 of the heat exchange mechanism 2 is provided with three partitions 216 arranged in a ring array. These three partitions 216 divide the upper water tank 21 into three upper chambers. Similarly, the three partitions 217 divide the lower water tank 22 into three lower chambers (e.g., ...). Figure 4 and Figure 5 As shown, the inlet pipe 25 and the outlet pipe 26 are located in the same lower chamber. The bottom end of the first set of heat exchange pipes 218 is connected to the lower chamber. The sixth set of heat exchange pipes 223 is connected to the outlet pipe 26. The bottom ends of the second set of heat exchange pipes 219 and the third set of heat exchange pipes 220 are connected to the same lower chamber. The bottom ends of the fourth set of heat exchange pipes 221 and the fifth set of heat exchange pipes 222 are connected to the same lower chamber.

[0025] When using this heat exchange device to treat high-temperature flue gas, the low-temperature coolant enters the lower water tank 22 through the inlet pipe 25. The coolant flows upward along the first set of heat exchange tubes 218 into the upper chamber of the upper water tank 21, then flows downward through the second set of heat exchange tubes 219 into the lower chamber of the lower water tank 22. The coolant then flows upward through the third set of heat exchange tubes 220 into the upper water tank 21, then flows downward through the fourth set of heat exchange tubes 221 into the lower water tank 22. The coolant then flows upward through the fifth set of heat exchange tubes 222 into the upper water tank 21, and finally flows upward through the sixth set of heat exchange tubes 222 into the lower water tank 22. The heat pipe 223 flows downwards into the outlet pipe 26, and is discharged from the heat exchange mechanism 2 through the outlet pipe 26. All six sets of heat exchange pipes use 304 finned tubes for heat exchange, which have high heat exchange efficiency and long service life. The upper water tank 21 and the lower water tank 22 are divided by partition 1 216 and partition 2 217 respectively, dividing the water flow of this device into three return paths. At the same time, by adding baffle 214 and baffle ring 215 inside the heat exchange shell 29 and at the bottom position, the smoke chamber inside the heat exchange shell 29 is divided into three interconnected small smoke chambers by the baffle 214 and baffle ring 215, so that the flue gas can be... Figure 1 The path indicated by the arrow flows within the heat exchange shell 29. The presence of baffles 214 and baffle rings 215 increases the flow path of the flue gas within the effective straight distance, thereby increasing the heat exchange area between the high-temperature flue gas and the low-temperature coolant. This heat exchange device is reasonably designed, which can make the flow state of the high-temperature flue gas and the low-temperature coolant more conducive to the rapid transfer of heat. The heat exchange between the flue gas and the heat exchange medium is sufficient, making the heat exchange device more efficient in a smaller space.

[0026] Example 2: Figures 1-4 As shown, a filter screen 212 is snapped into the inside of the connecting pipe 23, a dust scraper 211 is slidably connected to the inner wall of the heat exchange shell 29, a stepper motor 28 is fixedly connected to the top of the baffle ring 215, and a lead screw 210 is fixedly connected to the output end of the stepper motor 28. The top end of the lead screw 210 is rotatably connected to the bottom of the upper water tank 21, and a connecting ring 213 is provided on the top of the dust scraper 211. The inner wall of the connecting ring 213 is threadedly engaged with the outer side of the lead screw 210.

[0027] The overall effect of this embodiment is that when the heat exchange device performs heat exchange treatment on high-temperature flue gas, the high-temperature flue gas is introduced into the connecting pipe 23 through the fan 1, the filter screen 212 can filter out large particulate impurities in the flue gas to prevent impurities from entering the heat exchange device, and the high-temperature flue gas is evenly dispersed into the heat exchange shell 29 through the porous pipe 24 to prevent the high-temperature flue gas from accumulating and improve the heat exchange effect of the flue gas.

[0028] By adding a vertically movable dust scraper 211 inside the heat exchange housing 29, after the heat exchange device has been used for a period of time and a layer of dust has accumulated on the outer wall of multiple heat exchange tubes, the stepper motor 28 is turned on. The stepper motor 28 drives the lead screw 210 to rotate, thereby causing the dust scraper 211 to slide up / down along the heat exchange housing 29, thereby scraping off the dust accumulated on the surface of the heat exchange tubes and improving the heat exchange effect of the heat exchange device.

[0029] The operating method and working principle of this device are as follows: When using this heat exchange device to treat high-temperature flue gas, the high-temperature flue gas is introduced into the heat exchange shell 29 by the fan 1, and the low-temperature coolant enters the lower water tank 22 through the inlet pipe 25. The coolant flows along multiple sets of heat exchange tubes and is finally discharged from the heat exchange mechanism 2 through the outlet pipe 26. The upper water tank 21 and the lower water tank 22 are divided by partition 1 216 and partition 217 respectively, dividing the water flow of this device into three return passes. At the same time, by adding baffle 214 and baffle ring 215 inside the heat exchange shell 29 and at the bottom position, the heat exchange shell 29 is... The smoke chamber inside 9 is divided into three interconnected small smoke chambers by baffle 214 and baffle ring 215, thereby increasing the flow path of the flue gas within the effective straight distance, and thus increasing the heat exchange area between the high-temperature flue gas and the low-temperature coolant. The heat exchange device is reasonably designed, and the bottom-up water flow direction is more in line with thermodynamics, which can better achieve the deoxygenation effect, reduce the damage of cavitation to the equipment, and extend the service life of the equipment. It can make the flow state of high-temperature flue gas and low-temperature coolant more conducive to rapid heat transfer, and the heat exchange between the flue gas and the heat exchange medium is sufficient, so that the heat exchange device has higher heat exchange efficiency in a smaller space.

[0030] After the heat exchange device has been used for a period of time, the stepper motor 28 drives the lead screw 210 to rotate, thereby causing the dust scraper 211 to slide up / down along the heat exchange shell 29 to scrape off the dust accumulated on the surface of the heat exchange tube, thus improving the heat exchange effect of the heat exchange device.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A high-efficiency and compact heat exchange device, comprising a fan (1) and a heat exchange mechanism (2), characterized in that: The heat exchange mechanism (2) includes an upper water tank (21), a lower water tank (22), a connecting pipe (23), a heat exchange shell (29), a baffle (214), and a retaining ring (215). The upper water tank (21) and the lower water tank (22) are respectively fixedly installed at the upper and lower ends of the heat exchange shell (29). The top end of the connecting pipe (23) is fixedly installed with the top end of the upper water tank (21), and the bottom end of the connecting pipe (23) extends into the heat exchange shell (29) and is fixedly connected with a perforated pipe (24). The upper water tank (21) has three partition plates (216) fixedly arranged in a ring array inside, and the lower water tank (22) has three partition plates (217) fixedly arranged in a ring array inside. The outer edge of the lower water tank (22) is fixedly connected to an inlet pipe (25) and an outlet pipe (26) located between adjacent partitions (217). Inside the heat exchange shell (29), baffles (214) and baffle rings (215) are respectively arranged from top to bottom, and there is a gap between the baffles (214) and the inner wall of the heat exchange shell (29). Six sets of heat exchange tubes are fixedly connected in a ring array between the upper water tank (21) and the lower water tank (22), namely the first set of heat exchange tubes (218), the second set of heat exchange tubes (219), the third set of heat exchange tubes (220), the fourth set of heat exchange tubes (221), the fifth set of heat exchange tubes (222) and the sixth set of heat exchange tubes (223).

2. The high-efficiency and compact heat exchange device according to claim 1, characterized in that: Two sets of heat exchange tubes are located between adjacent partitions (217), and the bottom end of the sixth set of heat exchange tubes (223) is fixedly connected to the top of the outlet pipe (26).

3. The high-efficiency and compact heat exchange device according to claim 1, characterized in that: The inside of the connecting pipe (23) is fitted with a filter screen (212), and the inner wall of the heat exchange shell (29) is slidably connected with a dust scraper (211).

4. The high-efficiency and compact heat exchange device according to claim 3, characterized in that: The top of the retaining ring (215) is fixedly connected to a stepper motor (28), and the output end of the stepper motor (28) is fixedly connected to a lead screw (210).

5. The high-efficiency and compact heat exchange device according to claim 4, characterized in that: The top end of the lead screw (210) is rotatably connected to the bottom of the upper water tank (21), and a connecting ring (213) is provided on the top of the dust scraper (211).

6. The high-efficiency and compact heat exchange device according to claim 5, characterized in that: The inner wall of the connecting ring (213) is threaded into the outer side of the lead screw (210), and the bottom end of the heat exchange shell (29) is fixedly connected to the air outlet pipe (27).

Images